KR>electric fuel pumps / failures
On 11/23/2021 8:58 AM, Flesner wrote: Other concerns on electric pumps only came to mind during my morning shower but I'll have to wait till this evening when I have more time to post them. Larry Flesner + On my "not to scale" drawing on an earlier post you may have noticed that my fuel pressure gauge is after the pumps but before the regulator. That's because I grew concerned that I'd need a regulator after I had the system complete. The regulator fit nicely after the gauge so I went with it. Result is I know if pumps are working but must rely on regulator to maintain correct pressure. If they were reversed I'd know exactly what pressure the carb is seeing. Here is a photo of my batteries on the firewall. https://www.dropbox.com/s/3h27f5jtqitz7yx/IMG_8083.JPG?dl=0 I weighed a 5 AH battery at the shop today and it was 3 pounds exactly. Even if you double that for the rest of a backup system, switches, wires, circuit breakers, etc., it's still a small price to pay to keep you in the air and out of a corn field as mine did for me. Here is a closeup of my "emergency" panel. Yellow switch hooks alternator output to backup battery. The switch to the left of the radio (Radio / GPS) has been replaced with a single pole / double throw (up on / down on / center off) that is now "up = avionics on main buss" "down = avionics on backup battery" "center = off". https://www.dropbox.com/s/u39owy7asnll1b2/100_0169.jpg?dl=0 Better photo showing both fuel valves (down past the stick) and "emergency" panel in red. Fuel line is on left firewall in the white spiral braid. It makes a 90 degree about level with the panel bottom and goes forward, through the regulator, firewall, and to the gas collator. Anyone running a VW or Corvair should think twice before just running a standard ignition with all electrical running off the master buss. If you loose the master buss as I did (think turning off the master switch) or a battery failure that draws voltage down below the level to power components you have no way to recover. With a small backup battery you can flip a switch and bring the ignition and fuel pumps back on line. Mark Langford had posted some schematics to accomplish the task. If your engine will not "windmill" make sure the backup includes the ability to turn the starter. It shouldn't take much for the starter to turn the engine if you still have flying speed to unload the prop. A standard alternator will need the "field" backed up also to have alternator output. Each aircraft is different so just make a list. If I lose my master buss or battery, I need this to happen and then design / wire accordingly. Mark Langford and I have both had electrical failures that required a backup to stay in the air. It's not an uncommon occurrence. Anyone running magnetos simply need to keep the fuel pumps running for the simplest possible backup. Larry Flesner -Please see LIST RULES and KRnet info at http://www.krnet.org/info.html -Change list delivery options at https://list.krnet.org/list/krnet.list.krnet.org/ Affinity List Info Board -Search recent KRnet Archives at https://list.krnet.org/empathy/list/krnet.list.krnet.org/ -Search John Bouyea's decades of archive at https://www.mail-archive.com/krnet@list.krnet.org/
KR>Electric fuel pumps - final thoughts
Larry wrote- >Last, if someone has been injured or died from a single point failure of a >mechanical fuel pump >I suspect there is more to the story. Just my guess. Yes, there is more to this story. I don't know if anyone has been injured or died from a single point failure of the original mechanical fuel pump on the Corvair, but those pumps are certainly not the way to go on a flight Corvair conversion. They are a diaphragm type pump with fuel on one side of the diaphragm and the other side open to the crankcase where the actuating pushrod comes up from the eccentric that pumps the diaphragm. Failures of the diaphragm -a single point failure- have occurred, sometimes in significant numbers depending on the timeframe when those were manufactured. Raw fuel dumping into the crankcase through the ruptured diaphragm will not do anything to improve engine lubrication and pumping fuel vapor out the breather creates a fire hazard. Worse than a total rupture would be a tear or a hole in the diaphragm, which could allow the engine to continue running for a considerable time in that condition before it quit from fuel starvation, seized from lack of l ubrication, or something caught fire from the fuel being pumped around inside the engine and vented out the breather. In the early days of aero conversion of these engines, the simplicity and lack of need for any external power to operate the stock fuel pump made them attractive, especially for those on a budget. Just connect hoses and you've got pressurized fuel from a simple, low-profile, stock pump. Not a good idea on flight engines though. Oscar Zuniga Medford, OR Air Camper NX41CC, A75 power 164cid Corvair partially converted -Please see LIST RULES and KRnet info at http://www.krnet.org/info.html -Change list delivery options at https://list.krnet.org/list/krnet.list.krnet.org/ Affinity List Info Board -Search recent KRnet Archives at https://list.krnet.org/empathy/list/krnet.list.krnet.org/ -Search John Bouyea's decades of archive at https://www.mail-archive.com/krnet@list.krnet.org/
KR>Electric fuel pumps - final thoughts
Some final thoughts before I head to the local brewery to make music with some friends of mine. If your check list has you turn on the electric pump before startup make sure you turn it off long enough before turning it back on for T.O. to insure the engine pump is working. How long does it take the engine to empty the carb at high idle / taxi speed? As for carrying a backup battery, many experimentals are using electronic ignition now days that require a backup battery. No reason this second battery can't do double duty as a backup for fuel pumps. Last, if someone has been injured or died from a single point failure of a mechanical fuel pump failure I suspect there is more to the story. Just my guess. 1.2.3.4 / 1,2,3,4 / pick it Luther... Larry Flesner -Please see LIST RULES and KRnet info at http://www.krnet.org/info.html -Change list delivery options at https://list.krnet.org/list/krnet.list.krnet.org/ Affinity List Info Board -Search recent KRnet Archives at https://list.krnet.org/empathy/list/krnet.list.krnet.org/ -Search John Bouyea's decades of archive at https://www.mail-archive.com/krnet@list.krnet.org/
KR>electric motor for propulsion
Dee David asked- >Does anyone have any clue of electric airplane motor for 33-60 HP being sold There are some out there and they are very interesting... but not cheap. My understanding is that you'll be looking at about $10,000 for the motor and controller without the batteries. The motors themselves are quite small, constant torque like most electric motors of this type, so the throttle response is probably quite impressive. Check out emrax.com for motors, and DTI (Drivetrain Innovation) for controllers. The Emrax 188, their smallest, is listed on their website as 52kW max (about 70 HP) and the air-cooled version weighs 7 kg (under 16 lbs). Oscar Zuniga Medford, OR -Please see LIST RULES and KRnet info at http://www.krnet.org/info.html -Change list delivery options at https://list.krnet.org/list/krnet.list.krnet.org/ Affinity List Info Board -Search recent KRnet Archives at https://list.krnet.org/empathy/list/krnet.list.krnet.org/ -Search John Bouyea's decades of archive at https://www.mail-archive.com/krnet@list.krnet.org/
Re: KR> Electric KR, New Zealand
There's a pretty significant difference in the flammability between an Lithium Ion battery vs a Lithium Iron battery. That's why I have a 4# Lithium Iron EarthX battery in my KR. -Jeff Scott Arkansas Ozarks. > Sent: Tuesday, June 16, 2020 at 5:15 PM > From: "Flesner via KRnet" > To: "Mike Stirewalt via KRnet" > Cc: "Flesner" > Subject: Re: KR> Electric KR, New Zealand > > On 6/16/2020 4:41 PM, Mike Stirewalt via KRnet wrote: > > Robin is replacing a HAPI with a 60 HP electric motor and is building his > > own battery modules with batteries (1865 Lithium Iron) bought in China! > > His email follows. I'm posting this with the hope that others interested > > in electrics can share information with each other. Robin's email is > > above. > > + > > I'd suggest he take one of those LI-ON 18650 cells outside, short it > out, then re-evaluate flying with hundreds of them under the cowl. I've > accidentally shorted them out rebuilding battery packs and it ain't a > pretty picture. That technology is like a woman. You better treat it > right. Some other forms of LI-ON are more forgiving. > > Larry Flesner > ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
Re: KR> Electric KR, New Zealand
On 6/16/2020 4:41 PM, Mike Stirewalt via KRnet wrote: Robin is replacing a HAPI with a 60 HP electric motor and is building his own battery modules with batteries (1865 Lithium Iron) bought in China! His email follows. I'm posting this with the hope that others interested in electrics can share information with each other. Robin's email is above. + I'd suggest he take one of those LI-ON 18650 cells outside, short it out, then re-evaluate flying with hundreds of them under the cowl. I've accidentally shorted them out rebuilding battery packs and it ain't a pretty picture. That technology is like a woman. You better treat it right. Some other forms of LI-ON are more forgiving. Larry Flesner ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
KR> Electric KR, New Zealand
Forwarded to KRNET by me (hope Robin doesn't mind!) Robin Macdonald flyer67.ro...@gmail.com ** Robin is replacing a HAPI with a 60 HP electric motor and is building his own battery modules with batteries (1865 Lithium Iron) bought in China! His email follows. I'm posting this with the hope that others interested in electrics can share information with each other. Robin's email is above. Hi Mike, I see from the Krnet you have a a KR2. I am in New Zealand and purchased a KR2 that had been built in the 70's. When I got it home there was a few problems with it so strpped it down & started again, then in the middle of it it all we got hit with 2 earthquakes in 2010 & 2011 & about 20,000 aftershocks. My house was not badly damaged - a few cracks in the paster but not much . . . not like some people. I decided to shift so the KR went into storage. I've relocated & built a big garage & am in the process of bringing the KR2 home. I looked into using an electric motor instead of the 1835 Hapi that I purchased - that is another story. I found a Drone motor 40 KW, 60 HP complete with a ESC ( Electric speed controler) then looked for batteries, but not much luck, so decided to build my own with 1865 Lithinm Iron. Then in the middle of all that the country became locked down with the Covid 19. We are now back to normality what ever that is & in the process of purchasing a spot welder for the batteries & 1000 batteries from China. (My emphasis) So, in the next 6 - 12 mths should be a lot further ahead with it all. Regards Robin Macdonald New Zealand Virus-free. www.avast.com ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
Re: KR> Electric
I personally feel that Elec powered KRs is still a long way to meet reality mainly due to battery weight. Range I feel would be very poor but it is a nice project to study and follow what others have to say. Don J. N40WS donated to build Taylor-mono plane On Mon, Jun 15, 2020 at 2:53 PM Oscar Zuniga via KRnet wrote: > Rather than dump info onto KRNet, I'll just summarize what the electric > Pietenpol experiment ran. HPEV-50 3-phase induction motor, rated 71HP at > about 3300 RPM. 100 volt, 115 lbs. Batteries: lithium ion polymer, 100 > amp-hour with Curtis controller. Ivo prop, abut 4-4.5 degrees of pitch got > it to about 210 lbs of static thrust. I'll attempt to attach a little pic > of what the firewall forward setup looks like (76kb image) > > Oscar Zuniga > Medford, OR > ___ > Search the KRnet Archives at > https://www.mail-archive.com/krnet@list.krnet.org/. > Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options. > To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org > ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
KR> Electric
Rather than dump info onto KRNet, I'll just summarize what the electric Pietenpol experiment ran. HPEV-50 3-phase induction motor, rated 71HP at about 3300 RPM. 100 volt, 115 lbs. Batteries: lithium ion polymer, 100 amp-hour with Curtis controller. Ivo prop, abut 4-4.5 degrees of pitch got it to about 210 lbs of static thrust. I'll attempt to attach a little pic of what the firewall forward setup looks like (76kb image) Oscar Zuniga Medford, OR ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
KR> Electric
John Mason said, "I will go one further and offer 81JM as a test bed to anyone who can put together a credible plan to electrify her. She is currently flying with all basic instruments working." That's a generous offer and surely will be of interest to any number of innovators in the electric world. Poking through the forums on that subject I've seen these folks build wood and composite structures as testbeds for their projects - pretty crude looking compared to a KR. I've seen KR-sized firewalls with an electric motor mounted. How much further along they would be with an already flying plane like your KR! Harbour Air in BC has converted one of their Beavers for commercial operations and plan to convert the rest of their fleet. A Caravan was recently electrified https://tinyurl.com/ybwzz7wa and huge strides are being made in Europe, China, here in the US and surely many other places. Tesla recently bought Maxwell who itself is involved in development of electric aircraft so Tesla is obviously involved in this enterprise as they are in so many others. Musk moving to the U.S. was surely a huge loss for South Africa, but oh well. If it wasn't for their communist and thoroughly corrupt ANC government he might have stayed. Anyway, this direction towards electric flight is not hard to understand when you see an 80 HP motor that weighs 20 pounds and doesn't need overhaul until 10 thousand hours. Lots of homegrown individuals with electrical skills are putting together these motors with controllers, batteries, and monitoring panels - mostly on ultralight/LSA sized airframes at this point. Clearly there's a mad dash going on to develop higher energy density/lighter batteries. Musk is shooting for 400wh/kilogram within 5 years but with so much effort going into this project, breakthroughs will likely arrive much sooner. It's a really interesting subject and one the upper atmosphere sorely needs since at current rates carbon emissions from airliners are scheduled to double by 2050. Here's a media overview of recent developments. https://www.youtube.com/watch?v=hHApAWHO_bc ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
Re: KR> Electric
Electric power is a subject I have been researching ever since I saw Mark Beierle's electric Thunder Gull at OSH many years ago. However my interest was in a self-launching glider. Re: Tristan's post excerpt below - I already have an ultra-efficient airframe, a kitbuilt Albastar Apis WR. It's a 13.5 meter span glass glider with realistic, verifiable 38:1 glide performance due to its low weight. Albastar is a composite mfr who does contract work for some of the well-known German glider mfrs, and after a time began to design their own aircraft. They sold the Apis intellectual property and name some time ago, and it ended up in the hands of Pipistrel - who have just got EASA cert on their Velis design etc as noted by Mike in his post below. https://www.pipistrel-usa.com/apis/ Pipistrel sold the Apis as a motorglider with a typical retractable 2-stroke engine on a mast. Originally it was available as a pure glider as well. According to Pipistrel's website the Apis is now out of production, which is news to me since the last time I looked at their site a few months ago. Albastar is not out of the picture just yet. They have their own glider in production called the Albastar AS, available in 13.5 m and 15 m span. https://www.gliders-albastar.com/as-135-m/ The pics reveal the fuselage to be almost identical to the Apis with the addition of a retractable mainwheel. The interesting feature is the FES Front Engine Sustainer powerplant. This is a smallish outrunner electric motor similar in size, weight, and output to what would be a largish powerplant for giant-scale model aircraft. The motor is mounted in the nose and as seen in their pics, it turns a small-diameter prop with blades which fold back against the fuselage when not running. This system is available on a number of gliders sold in Europe at this time. http://front-electric-sustainer.com/ It's called a "sustainer" because when installed on a large, heavy or 2-place glider, it can be used to maintain altitude in no-lift conditions and save landing out. In a smaller, much lighter glider like the Apis, the system has enough thrust and duration to launch from a dead stop on the runway. An Apis would require far, far less thrust than a Zero powerplant can generate. And once I'm at altitude I turn it off and fly for a couple of hours with batteries running instruments and radio only. I'm content letting someone else's R&D serve my purposes since my application is almost exact as Albastar's AS so I contacted FES about installing a system on my Apis. On the following link they explain that they don't really sell kits or components to DIY the job, and I understand why. A bulkhead for the motor/prop needs to be installed and strength calcs for this and the battery trays and W&B need to be done in a way that takes them off the hook for the engineering aspect of the retrofit. http://front-electric-sustainer.com/sailplanes.php They replied they could install a FES in my glider if I shipped it to Slovenia so they could control all aspects of the installation. Cost would be around $16000 USD, not including shipping, and turnaround time would be 90 - 120 days or longer depending on their workload and schedule. $16k is more than I have in the glider. By rough calc, $16k could pay for 4+ years of tows to 2000' AGL considering my flying habits. FES - the business - is located in Slovenia, as is Albastar, as is Pipistrel. I believe they all test at Lesce Bled airfield, where the pic of the Apis hoisted by the three guys was taken. The area has an aerospace brain trust that is quite mobile much like Wichita in the 60s and 70s - familar faces repeatedly encountering familiar faces as they move around from employer to employer. People at Pipistrel with whom I have interacted have a pragmatic and enthusiastic approach which makes me think they are definitely on an upward trajectory. What I DO NOT get from them is the pressure one feels from many of the e-acolytes in the US that everybody running IC power MUST change their ways if they want to be hip, or want to avoid being sent to gulag. My $.02 and YMMV... Chris K On 6/14/2020 12:19 PM, Tris Hotmail via KRnet wrote: I have done all the groundwork for this exercise with a Rutan Quickie (Q1) and have the aircraft and the electric powertrain donor in my hangar. On Jun 14, 2020, at 12:54 AM, Gary Sack via KRnet wrote: I will go one further and offer 81JM as a test bed to anyone who can put together a credible plan to electrify her. She is currently flying with all basic instruments working. On Thu, Jun 11, 2020, 11:36 Mike Stirewalt via KRnet wrote: Someone in the initial thinking/designing phase of a KR project might consider using electric power instead of our tried and true engines. Pipestrel just got their trainer approved by EASA and the FAA can't be far behind. ___ Search the KRnet Archiv
Re: KR> Electric
I have done all the groundwork for this exercise with a Rutan Quickie (Q1) and have the aircraft and the electric powertrain donor in my hangar. The project is currently awaiting more of my time (unlikely for a year or two). I would like to humbly pass on some suggestions/observations: 1. Scope out the minimum power requirements (take-off, cruise) and the propeller RPM range you will accept for full power delivery. For instance, on the Quickie, 3500 rpm is what the original 18-22hp engine used due to prop sizing and tip speed constraints. Convert your brain and calculations from hp to kW (1kW = 1.34hp). The Q1 needed about 16kW for take-off at MGW and needed 8kW for cruise. I then hunted for a long time trying to find the perfect motor that would deliver these parameters. You will be severely weight-limited in this project due to energy density constraints of electric batteries so chances are you need to dismiss a propeller speed reduction unit at the outset. Look for a direct drive arrangement i.e. Prop RPM = motor rpm. 2. In parallel with this, the maximum battery+motor weight available in the airframe of choice must be considered. In simple terms, add up the weight of all the unneeded current gas engine components and the max fuel capacity weight. That will be your starting point for total weight available for the electric motor, controller, and battery (which may or may not contain the battery management system - BMS). Then add anything left over from full fuel payload with the specific pilot in mind. 3. Now calculate the maximum battery capacity available for the weight you just calculated (minus the motor weight). This is where you will have your first reality check. For instance on the Q1, The original engine plus full fuel added up to ~120 lbs. I’m a light pilot, so I managed to get another 75 lbs of payload capacity to bring it up to MGW. The electric motor was ~37lbs, motor controller another 10 lbs, leaving 148 lbs for batteries. 4. Now comes the maybe demoralizing part. Energy density in a very good battery PACK (including all the casing and essential safety connectors etc) is ~12 lbs/kWh. Don’t be seduced by data about just the individual cells. So 148 lbs = 12.3 kWh. I think 5 mins at T/O (max) power is a reasonable requirement, then the rest of the flight can be calculated at best endurance speed or range speed depending on your goal. If you can honestly get take-off power (5mins) plus cruise endurance to give you more than 1-1.5 hours you’re doing well. For example, on the Q1, takeoff power is 16kW for five minutes uses 1.3 kWh. Subtract that from the maximum battery capacity calculated in para 3 and you have ~11 kWh remaining. Cruise at 8kW will give another 1.375 hrs, or 1hr 22.5 mins. No reserve. Total flight time until the motor stops ~1.5 hours. 5. Perhaps now, the reason I chose a Quickie design is becoming clear. These numbers work for a super-efficient aircraft that only needs 8kW to maintain cruise speed. I don’t know the numbers for the KR, but is the available battery weight capacity going to make up for the higher cruise power requirement? 6. Implications. Due to the need to have the maximum possible battery capacity onboard, you will probably be at MGW THROUGHOUT THE FLIGHT AND LANDING. Think hard about this. How does your KR fly at MGW? This is how it will behave whether you have a full battery charge or nearly empty. This is not a trivial consideration. 7. Now for the good news. After diving down many Chinese electric motor website rabbit holes I stumbled on the powertrain from Zero motorcycles based right here in the USA (Santa Cruz/Monterey, CA). A year or two later, I managed to afford a 2014 Zero SR which had the particular motor I was interested in and came with an 11.4kWh battery pack as standard. It then dawned on me to use the whole powertrain from the motorcycle, not just the motor and battery. This solves the motor controller choice, the ’throttle’ controller, the battery pack and battery management system all in one go. The powertrain can wake up and not realize it isn’t a motorcycle…I think this will save years of development work from the project, you just need to find a Zero model that matches your requirements. You can always optimize it later. If the above excites your curiosity and doesn’t put you off, then please go and succeed or learn while failing. I am a hard-over disciple to this idea, even though it may seem I am trying to discourage you. Coincidentally, I have a beautiful working (I ride it now and again) 2014 Zero SR motorcycle for sale as I figure I can just buy another one in a year or two when I have the time to move my own project forward. I’m not sure the specs will be sufficient for a KR project (67 hp, at 3500 rpm) but that’s for you to decide. You may need a newer, more powerful model. Good luck, I look forward to hearing how it goes. Tristan KR-1 project (95% done) Rutan Q
KR> Electric
I have a writeup on an electric conversion on a Pietenpol that has been run tested and pull tested, but not flown. Showed promise with the amount of thrust that it developed in the pull testing. The author/developer gave permission to publish it in Contact! Magazine but it has not been yet. Gary Sack, I'll get with you offline to discuss since it sounds like you may be interested. Oscar Zuniga Medford OR Sent from my iPhone X ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
Re: KR> Electric
I will go one further and offer 81JM as a test bed to anyone who can put together a credible plan to electrify her. She is currently flying with all basic instruments working. On Thu, Jun 11, 2020, 11:36 Mike Stirewalt via KRnet wrote: > > Someone in the initial thinking/designing phase of a KR project might > consider using electric power instead of our tried and true engines. > Pipestrel just got their trainer approved by EASA and the FAA can't be > far behind. Once the gate is open there will be a flood of electric > planes getting certified and hitting the market. None of us with engines > would give up our known power sources but for someone thinking of > building . . . I haven't looked into it be just from general impressions > an electric motor, maybe one taken from a wrecked Tesla, hooked up to a > self-sought controller and batteries and other components . . . Pat > Panzera probably already knows someone in the LSA or Experimental field > putting together turn-key electric propulsion solutions for homebuilders. > Electric planes are good only for training or flying around the ranch > but Pipestril is saying they'll have a four-seater with three hours of > range certified a year from now. Their EASA certification arrived a year > earlier that they had been projecting so this technology is moving fast. > In ten years I would expect fast chargers sitting next to the fuel bibs > at just about any airport except the smallest. > > Just an observation prompted by the Pipestril certification. Electric > power is the future, and not that far away. The KR is a slick fuselage > with a wing that carries a lot of weight without much trouble - > relatively perfect. If someone were to buy NVAero and start thinking > electric our KR designs will be part of the evolution. > > Mike > KSEE > > > > ___ > Search the KRnet Archives at > https://www.mail-archive.com/krnet@list.krnet.org/. > Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options. > To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org > ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
KR> Electric
Someone in the initial thinking/designing phase of a KR project might consider using electric power instead of our tried and true engines. Pipestrel just got their trainer approved by EASA and the FAA can't be far behind. Once the gate is open there will be a flood of electric planes getting certified and hitting the market. None of us with engines would give up our known power sources but for someone thinking of building . . . I haven't looked into it be just from general impressions an electric motor, maybe one taken from a wrecked Tesla, hooked up to a self-sought controller and batteries and other components . . . Pat Panzera probably already knows someone in the LSA or Experimental field putting together turn-key electric propulsion solutions for homebuilders. Electric planes are good only for training or flying around the ranch but Pipestril is saying they'll have a four-seater with three hours of range certified a year from now. Their EASA certification arrived a year earlier that they had been projecting so this technology is moving fast. In ten years I would expect fast chargers sitting next to the fuel bibs at just about any airport except the smallest. Just an observation prompted by the Pipestril certification. Electric power is the future, and not that far away. The KR is a slick fuselage with a wing that carries a lot of weight without much trouble - relatively perfect. If someone were to buy NVAero and start thinking electric our KR designs will be part of the evolution. Mike KSEE ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
Re: KR> Electric KR2 in Canada
That's pretty cool. Really nice to see young people learning and applying it. Here is quoted from their page: *To demonstrate some of the advantages of aircraft electrification, one of the requirements of the prototype is to double the inital climb speed, which illustrates the instantaneous power of electric motors. The target range is 40 minutes* I would suggest this is not going to happen. I think that to double the climb, you'd need double the continuous horsepower (if similar aircraft weight), Maybe they can. But assigning simply having "instantaneous power" to additional climb, does not jibe. You need double the *continuous* power. Doesnt matter about that 2 less seconds a recip engine reaches power, nor the modest disadvantage while the plane accelerates enough for the slipstream not to hold the engine beneath its peak power on the curve (only on the runway, and only applies if they referring to time-to-climb), nor even that an electric would be at peak power despite being slower rpm at best climb where a recip engine would be pulled down off peak. I dont think any of those advantages mean all that much in a climb and certainly not double.But they help. This is just off the top of my head for discussion. I am not an engineer. On Sat, Jan 25, 2020 at 12:56 PM Craig Williams via KRnet < krnet@list.krnet.org> wrote: > University project in Canada. > > http://projethera.espaceweb.usherbrooke.ca/en/home/ > > ___ > Search the KRnet Archives at > https://www.mail-archive.com/krnet@list.krnet.org/. > Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options. > To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org > ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
Re: KR> Electric KR2 in Canada
Hmmm? Well that’s my KR2S on the web site picture but so far it’s still a VW? I guess they just used this picture from Wikipedia as a typical light plane that could be converted. Maybe they want to convert mine to electric? Regards Chris Gardiner C GKRZ Sent from my iPad > On Jan 25, 2020, at 12:56 PM, Craig Williams via KRnet > wrote: > > University project in Canada. > > http://projethera.espaceweb.usherbrooke.ca/en/home/ > > ___ > Search the KRnet Archives at > https://www.mail-archive.com/krnet@list.krnet.org/. > Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options. > To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
KR> Electric KR2 in Canada
University project in Canada. http://projethera.espaceweb.usherbrooke.ca/en/home/ ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
Re: KR> Electric Artificial Horizon
How does that KR fly with the 62x68 prop? I took the spinner off this past week end to check the torque on my prop. There wasn’t much torque left since it was installed it. Obviously new to the wood prop scene. Life goes on. I am getting better at 3 point landings. A Murphy Rebel, and C140. Good variety. Enjoy Roger Sent from Mail for Windows 10 From: Flesner via KRnet Sent: Saturday, November 17, 2018 4:47 PM To: james flowers via KRnet Cc: Flesner Subject: Re: KR> Electric Artificial Horizon On 11/17/2018 3:53 PM, james flowers via KRnet wrote: > What does it take to hook up, beside the electronics. The basic question is > do I hook up sometime else to the two hose outlets? (I don't know much > about this stuff, i want to put it in my kr2) +++ I'm guessing it should just be the two hoses and battery power. Everything else is internal. But that is a guess. Larry Flesner P.S. My buddy won a C140 in a raffle, yes, won a C140, and I made the first flight on another buddy's Murphy Rebel with an 0-320 Lycombing this afternoon. If my hometown University basket ball team wins tonight it will be a trifecta kind of day!! The Rebel does not fly like a KR but more like a dump truck. Now I can't wait to fly the C-140. https://www.barnstormers.com/cat.php?mode=listing&main= ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
Re: KR> Electric Artificial Horizon
Thanks Mark Langford On Sat, Nov 17, 2018, 9:19 PM Mark Langford via KRnet wrote: > James Flowers wrote: > > > What does it take to hook up, beside the electronics. The basic > question is > > do I hook up sometime else to the two hose outlets? > > The ebay ad that you visited also has a link to the manual, which is > > http://11hc.44rf.com/manuals/avionics-instruments/adi_install_and_user_guide.pdf > . It's a complete 16 page installation and operation manual, which > should answer all the questions you'd have > > Mark Langford > m...@n56ml.com > http://www.n56ml.com > > > ___ > Search the KRnet Archives at > https://www.mail-archive.com/krnet@list.krnet.org/. > Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options. > To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org > ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
Re: KR> Electric Artificial Horizon
James Flowers wrote: > What does it take to hook up, beside the electronics. The basic question is > do I hook up sometime else to the two hose outlets? The ebay ad that you visited also has a link to the manual, which is http://11hc.44rf.com/manuals/avionics-instruments/adi_install_and_user_guide.pdf . It's a complete 16 page installation and operation manual, which should answer all the questions you'd have Mark Langford m...@n56ml.com http://www.n56ml.com ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
Re: KR> Electric Artificial Horizon
On 11/17/2018 3:53 PM, james flowers via KRnet wrote: What does it take to hook up, beside the electronics. The basic question is do I hook up sometime else to the two hose outlets? (I don't know much about this stuff, i want to put it in my kr2) +++ I'm guessing it should just be the two hoses and battery power. Everything else is internal. But that is a guess. Larry Flesner P.S. My buddy won a C140 in a raffle, yes, won a C140, and I made the first flight on another buddy's Murphy Rebel with an 0-320 Lycombing this afternoon. If my hometown University basket ball team wins tonight it will be a trifecta kind of day!! The Rebel does not fly like a KR but more like a dump truck. Now I can't wait to fly the C-140. https://www.barnstormers.com/cat.php?mode=listing&main= ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
Re: KR> Electric Artificial Horizon
What does it take to hook up, beside the electronics. The basic question is do I hook up sometime else to the two hose outlets? (I don't know much about this stuff, i want to put it in my kr2) On Sat, Nov 10, 2018, 12:23 PM Mike Stirewalt via KRnet < krnet@list.krnet.org> wrote: > > There is a Trutrak attitude indicator on eBay for a Buy it Now price of > $450. This instrument came in two sizes, 3 1/8 diameter and 2 inch. The > one listed below is the larger one and includes the GPS function that > renders heading information. > > Trutrak doesn't make this particular model anymore, however they will > repair it if that were ever necessary. They are solid state so there's > little to go wrong. Mine has been fine for hundreds of hours and is a > very easy device to use when caught in instrument conditions. Having > heading info with the attitude info means a lot less eye-shifting. > > I know a lot of guys are going for the expensive glass Dynon and other > EFIS panels, however, assuming the panel is equipped with the standard > instruments found in all airplanes, for instrument flying this little guy > from Trutrak is really all one needs. Having two of them - the second > one being the 2 inch model - powered independently would be even better. > > > I paid $1200 for mine back in 2007 so $450 seems inexpensive. Notice it > has an inclinometer built-in. > > https://www.ebay.com/itm/323542255981?ul_noapp=true > > Trutrak calls it an ADI for Attitude Directional Indicator. The > (optional) GPS input gives direction. For someone putting a panel > together, I give this instrument 5 stars. > > Mike > KSEE > > > How To Remove Eye Bags & Lip Lines Fast (Watch) > Fit Mom Daily > http://thirdpartyoffers.juno.com/TGL3141/5be713c95b16013c9529cst04vuc > > ___ > Search the KRnet Archives at > https://www.mail-archive.com/krnet@list.krnet.org/. > Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options. > To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org > ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
KR> Electric Artificial Horizon
There is a Trutrak attitude indicator on eBay for a Buy it Now price of $450. This instrument came in two sizes, 3 1/8 diameter and 2 inch. The one listed below is the larger one and includes the GPS function that renders heading information. Trutrak doesn't make this particular model anymore, however they will repair it if that were ever necessary. They are solid state so there's little to go wrong. Mine has been fine for hundreds of hours and is a very easy device to use when caught in instrument conditions. Having heading info with the attitude info means a lot less eye-shifting. I know a lot of guys are going for the expensive glass Dynon and other EFIS panels, however, assuming the panel is equipped with the standard instruments found in all airplanes, for instrument flying this little guy from Trutrak is really all one needs. Having two of them - the second one being the 2 inch model - powered independently would be even better. I paid $1200 for mine back in 2007 so $450 seems inexpensive. Notice it has an inclinometer built-in. https://www.ebay.com/itm/323542255981?ul_noapp=true Trutrak calls it an ADI for Attitude Directional Indicator. The (optional) GPS input gives direction. For someone putting a panel together, I give this instrument 5 stars. Mike KSEE How To Remove Eye Bags & Lip Lines Fast (Watch) Fit Mom Daily http://thirdpartyoffers.juno.com/TGL3141/5be713c95b16013c9529cst04vuc ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
KR> Electric artificial horizon
I stumbled across this site today. I've never come across it before which is odd . . . I thought I knew all of the aircraft selling sites. But I don't. This one is devoted mainly it seems to ultralights but there's helicopters, projects and all sorts of interesting machines. One interesting item is what looks like a ridiculously good deal on a solid state gyro horizon that fits a 2.25" panel hole. It says it's for sale for $200. That appears to be the sale price however it could be the starting bid if it's on auction - I didn't explore things any further. The site is interesting to glance through and on some items I saw the words "starting bid" so some things are on auction and other things are just for sale. There's a Star Lite which preceded the Pulsar . . . an unusual ultralight that doesn't look like an oversized kite - as most do. The canopy I have on Ken Cottle's KR-1½ came from a Star Lite. eHorizon: https://tinyurl.com/y99plagp Star Lite https://tinyurl.com/ydygyjfz Mike KSEE How To "Remove" Dark Spots Gundry MD http://thirdpartyoffers.juno.com/TGL3141/5b21defd574cf5efd477ast01vuc ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
KR> Electric Flap Actuator
Currently in-process of installing an electric flap actuator, LACT-4, in my KR-2. I purchased a controller from Northern Tool that is specifically designed for the LACT-4. I built an aluminum box to mount the control display, three position switches and an LED caution indicator. Here is a picture of the controller display and mounting box. https://s3.amazonaws.com/expercraft/sidwood/144256209656b7f7d4a072b.jpg Sid Wood Tri-gear KR-2 N6242 Mechanicsville, MD, USA
KR> Electric tach readout (for input to an EFIS system)
All the part-numbers discussed below can be seen on this page: http://www.westach.com/products/ACCESSORIES/SPEED%20SENSORS/index.php My EFIS system came with this unit for a tach pickup: 303DGT It fits a Lycoming tach output, not the one on the VW. I am thinking of getting this unit: 720-14R, since my motor has a slick mag on it - I assume that this will screw into the back of the mag & pick up RPM by detecting the mag parts as they spin past it... Is this right? Also, is there any way to make a Lycoming tach pickup fit a VW motor (so I can avoid buying a whole new tach pickup)?
KR> Electric Artificial Horizon
> Maybe it's time for a little glass in my cockpit... There's still no bids on the TruTrak ADI below. It's well worth $600 or a bit more. I'd go as high as $800 for one that's been treated as nicely as this one appears to have been treated. Actually, I don't think anyone buys expensive electronics and abuses them. This one is 3 1/8" and will exactly fit your T&B empty space. Item number: 260773310655 Mike KSEE Banks Forced to Forgive Credit Card Debt See how much of your debt could be settled! http://thirdpartyoffers.juno.com/TGL3141/4db658943ef18ceb9bst04vuc
KR> Electric Artificial Horizon
If it is labeled "Falcon" it is direct from China. They are imported by Wultrad. Their instruments have a history of poor performance and reliability. Bob Lasecki -Original Message- From: Larry&Sallie Flesner To: KRnet Sent: Mon, Apr 25, 2011 7:10 am Subject: Re: KR> Electric Artificial Horizon At 11:41 PM 4/24/2011, you wrote: >but an AI is something you want to be able to implicitly trust. I >wouldn't want something that occasionally "does something funny." >+++ The seller couldn't really pinpoint what he thought the "occasionally does something funny" feature is all about. I plan to give it a good VFR checkout before putting any money down. I only want one in the panel to get me out of a spot where I got a bit stupid or maybe on those days flying high when it's hazy and no horizon. I don't want those times to be the time it "does something funny". Larry Flesner ___ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
KR> Electric Artificial Horizon
At 11:41 PM 4/24/2011, you wrote: >but an AI is something you want to be able to implicitly trust. I >wouldn't want something that occasionally "does something funny." >+++ The seller couldn't really pinpoint what he thought the "occasionally does something funny" feature is all about. I plan to give it a good VFR checkout before putting any money down. I only want one in the panel to get me out of a spot where I got a bit stupid or maybe on those days flying high when it's hazy and no horizon. I don't want those times to be the time it "does something funny". Larry Flesner
KR> Electric Artificial Horizon
If you are going to steal it, the Falcon will probably be cheaper than what this fellow on eBay is expecting to get for his TruTrak ADI below, but an AI is something you want to be able to implicitly trust. I wouldn't want something that occasionally "does something funny." I see the auction below has no bids so it will probably go for around what he started the bidding off with - $600. With the GPS model (as this one is - it comes with a GPS puck that plugs into the back of the instrument) Gulf Coast Avionics wants $1200+ for a new one. This one on eBay looks like new. TruTrak will do for free any service work that might ever be necessary (even if you're not the original owner) but since these things are all solid state it isn't likely to ever need anything. Mine never has. Great instrument. The GPS track readout replaces a DG for all practical purposes and reduces scan. eBay Item #260773310655 Mike KSEE Groupon™ Official Site 1 ridiculously huge coupon a day. Get 50-90% off your city's best! http://thirdpartyoffers.juno.com/TGL3141/4db4fbc6e0f499c9a8st06vuc
KR> Electric Trim Install
Hey Dave, wouldn't be able to post photos of your installation? Paul Smith Brisbane, AUSTRALIA pk.sm...@bigpond.net.au http://kr2spacemodulator.blogspot.com/ -Original Message- I managed to get the manual trim system out of there and then fit the new RAC system.
KR> Electric Trim Install
I've managed to do it - a retrofit - but I just have to ask!!! Are all of you guys just little guys? Or do you hire midgets, or use mini-robots, or bribe your kids, or what??? My access panel is just about large enough for my head. No arms in there, just the head! So, with extensive use of a mirror and a video camera, I managed to get the manual trim system out of there and then fit the new RAC system. Would I do it again? Well, yeah, I guess!!! But not for free!!! Dave. N1199P N8325M
KR> Electric Trim
For this application, one needs to use an analog servo, not digital servo. John Melvin El Paso, Texas In a message dated 4/7/2010 8:32:28 A.M. Mountain Daylight Time, awh.hawk...@telus.net writes: I tried to use a r/c servo with a test controller, and it worked fine until the transponder transmitted, then it went to full deflection. If you use a r/c landing gear servo, it does not use a pulse modulation to control it, it might work. I went with a Ray allen servo, which works just fine. Al Hawkins Port Coquitlam, B.C. On 4/7/2010 12:42 AM, Peter Drake wrote: > Dave > > I have used a heavy duty model airplane radio control servo with a servo > tester circuit as a controller. It hasn't flown yet so I don't know whether > the servo is powerful enough. > I tried the wing mirror servo method with a servo off a Jeep Cherokee, but I > couldn't get it to operate fast enough. > > Peter > Hereford UK > > - Original Message - > From: "Dave Dunwoodie" > To: > Sent: Tuesday, April 06, 2010 10:32 PM > Subject: KR> Electric Trim > > > I haven't seen anything on here about electric trim, and I know lots of > > > -- > I am using the free version of SPAMfighter. > We are a community of 7 million users fighting spam. > SPAMfighter has removed 570 of my spam emails to date. > Get the free SPAMfighter here: http://www.spamfighter.com/len > > The Professional version does not have this message > > > > ___ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html > ___ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
KR> Electric Trim
Ray Allen probably is the best but, I went on the cheap side. I used 96 Toyota heater servo motors and Toyota Camary window switches. Seems to work fine. I also used the cables from the heater control off a toyota too. The motors and cables combined only weighed 5 ounces. --- On Wed, 4/7/10, Al Hawkins wrote: From: Al Hawkins Subject: Re: KR> Electric Trim To: "KRnet" List-Post: krnet@list.krnet.org Date: Wednesday, April 7, 2010, 9:31 AM I tried to use a r/c servo with a test controller, and it worked fine until the transponder transmitted, then it went to full deflection. If you use a r/c landing gear servo, it does not use a pulse modulation to control it, it might work. I went with a Ray allen servo, which works just fine. Al Hawkins Port Coquitlam, B.C. On 4/7/2010 12:42 AM, Peter Drake wrote: > Dave > > I have used a heavy duty model airplane radio control servo with a servo > tester circuit as a controller. It hasn't flown yet so I don't know whether > the servo is powerful enough. > I tried the wing mirror servo method with a servo off a Jeep Cherokee, but I > couldn't get it to operate fast enough. > > Peter > Hereford UK > > - Original Message - > From: "Dave Dunwoodie" > To: > Sent: Tuesday, April 06, 2010 10:32 PM > Subject: KR> Electric Trim > > > I haven't seen anything on here about electric trim, and I know lots of > > > -- > I am using the free version of SPAMfighter. > We are a community of 7 million users fighting spam. > SPAMfighter has removed 570 of my spam emails to date. > Get the free SPAMfighter here: http://www.spamfighter.com/len > > The Professional version does not have this message > > > > ___ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html > ___ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
KR> Electric Trim
I tried to use a r/c servo with a test controller, and it worked fine until the transponder transmitted, then it went to full deflection. If you use a r/c landing gear servo, it does not use a pulse modulation to control it, it might work. I went with a Ray allen servo, which works just fine. Al Hawkins Port Coquitlam, B.C. On 4/7/2010 12:42 AM, Peter Drake wrote: > Dave > > I have used a heavy duty model airplane radio control servo with a servo > tester circuit as a controller. It hasn't flown yet so I don't know whether > the servo is powerful enough. > I tried the wing mirror servo method with a servo off a Jeep Cherokee, but I > couldn't get it to operate fast enough. > > Peter > Hereford UK > > - Original Message - > From: "Dave Dunwoodie" > To: > Sent: Tuesday, April 06, 2010 10:32 PM > Subject: KR> Electric Trim > > > I haven't seen anything on here about electric trim, and I know lots of > > > -- > I am using the free version of SPAMfighter. > We are a community of 7 million users fighting spam. > SPAMfighter has removed 570 of my spam emails to date. > Get the free SPAMfighter here: http://www.spamfighter.com/len > > The Professional version does not have this message > > > > ___ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html >
KR> Electric Trim
Dave I have used a heavy duty model airplane radio control servo with a servo tester circuit as a controller. It hasn't flown yet so I don't know whether the servo is powerful enough. I tried the wing mirror servo method with a servo off a Jeep Cherokee, but I couldn't get it to operate fast enough. Peter Hereford UK - Original Message - From: "Dave Dunwoodie" To: Sent: Tuesday, April 06, 2010 10:32 PM Subject: KR> Electric Trim I haven't seen anything on here about electric trim, and I know lots of -- I am using the free version of SPAMfighter. We are a community of 7 million users fighting spam. SPAMfighter has removed 570 of my spam emails to date. Get the free SPAMfighter here: http://www.spamfighter.com/len The Professional version does not have this message
KR> Electric Trim
http://krbuilder.org/Trim/index.html This looks like a nice economical way of going about it... it is in my 'wish list' of things to do for N952MW. -Original Message- From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net] On Behalf Of Dave Dunwoodie Sent: Tuesday, April 06, 2010 4:33 PM To: kr...@mylist.net Subject: KR> Electric Trim I haven't seen anything on here about electric trim, and I know lots of you have it! I'd like to go electric on the elevator trim, but don't know what kind of linear motor, actuator, servo, geared motor, etc. would be up to the task. Any information would be greatly appreciated! Thanks, Dave N1199P N8325M ___ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
KR> Electric Trim
Here is my installation. Much like Langford's. http://www.flykr2s.com/trimtab.html Mark Jones (N886MJ) Stevens Point, WI E-mail: flyk...@charter.net Web: www.flykr2s.com
KR> Electric Trim
Dave Dunwoodie wrote: >I haven't seen anything on here about electric trim. See http://home.hiwaay.net/~langford/trimtab/index.html for my trim tab installation, and http://www.krnet.org for many others Mark Langford N56ML "at" hiwaay.net website at http://www.N56ML.com
KR> Electric Trim
Suggest you check out this link http://www.rayallencompany.com/index.html it's what I used Rick Human N202RH Houston, Tx
KR> Electric Trim
I haven't seen anything on here about electric trim, and I know lots of you have it! I'd like to go electric on the elevator trim, but don't know what kind of linear motor, actuator, servo, geared motor, etc. would be up to the task. Any information would be greatly appreciated! Thanks, Dave N1199P N8325M
KR> RE: KR Electric motor
Try this link http://www.kitplanes.com/news/news/8403-1.phtml I heard a segment on that Flight Time radio show. By the way is anyone still getting that show on the net? I haven't been able to get for a couple of weeks. -Joe > Hi KR Netters, > > I have been thinking about the idea of using an electric > motor in the KR2, I haven't been able to come up with much > information even though I know these type of power plants are > out there. > > Has anyone worked with the idea of using an electric motor > in the KR2 ?. Or would anyone have any good idea of where to > start looking ?. > > Thanks > Bobby Burington > CAlifornia KR Builder
KR> Electric motor ?
In my (extremely biased) opinion, an electric motor is the future, but definitely not a sustainable idea right now. I toyed with the idea for a while, but I think it can't be done satisfactorily. Endurance is way too marginal, and charging the battery is sure to be a long wait. The only application where it can work right now is self-launching gliders. For more power-hungry planes, we probably have to wait for a decade for the automotive industry to provide light and affordable battery technology first. In the meantime, the best affordable eco-friendly technology around is Diesel (lower fuel burn, and possibility to burn anything from Jet-fuel to bio-Diesel to spent cooking oil...). My next project will be just that: a two-seater of approximately the same MTOW as the KR2, powered by a tiny and light automotive Diesel engine (1.4 liter, 53 hp). Engines like that are a dime a dozen in Europe, where most cars are small, and two-thirds of them are Diesel. The challenge to select the engine was to find one with an all-aluminum block, and low technology (Europe having high anti-pollution standards and high fuel-economy expectations, so European engines are crammed with electronics, and it's not always easy to tamper with it). The engine used in that project is substantially heavier than a petrol engine, but that is entirely offset by the lower fuel burn (5 to 6 liters per hour, which is about 1.3 to 1.6 gallons per hour). The airframe is substantially more performing, aerodynamically speaking, which helps too. By the way, I'm not talking about a pipe dream, but a proven solution. The plane exists, the prototype has flown hundreds of hours, and has had three predecessors, all successful. Over 200 plans sold over 3 years, which is a huge success by European standards. Serge Vidal Melbourne, Australia No virus found in this outgoing message. Checked by AVG. Version: 7.5.549 / Virus Database: 270.8.3/1747 - Release Date: 26/10/2008 09:27
KR> Electric motor ?
This makes some sense for a motorglider, but has limited utility as an airplane. Bob Polgreen Ev car owner KR2 builder -Original Message- From: ColdLake-Tim To: bobbycrea...@yahoo.com; KRnet Sent: Sun, 26 Oct 2008 1:13 pm Subject: Re: KR> Electric motor ? Sonex > New idea at Oshkosh, all about batteries & their cost. http://www.airventure.org/2007/4wed25/sonex.html ___ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
KR> Electric motor ?
If you have $10K for the Li-Ion battery, don't mind having a 90 mph speed, a 90 - 120 minute range, flying alone, and $4K for the 9.2" Advanced DC motor and controller, then it is do-able. Here's a forum you should search or join about EV and everything you'll need to know. http://www.evforum.net/forums/showthread.php?p=4993#post4993 - this thread is about what you want to do.. http://www.evforum.net/forums/showthread.php?p=4071#post4071 - this one has part numbers and such for everything you'll need. -dave bobby burington wrote: > Hi KR Netters, > > I have been thinking about the idea of using an electric motor in the KR2, I > haven't been able to come up with much information even though I know these > type of power plants are out there. > > Has anyone worked with the idea of using an electric motor in the KR2 ?. Or > would anyone have any good idea of where to start looking ?. > > Thanks > Bobby Burington > CAlifornia KR Builder > > > > > ___ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html >
KR> Electric motor ?
Sonex > New idea at Oshkosh, all about batteries & their cost. http://www.airventure.org/2007/4wed25/sonex.html
KR> Electric motor ?
Hi KR Netters, I have been thinking about the idea of using an electric motor in the KR2, I haven't been able to come up with much information even though I know these type of power plants are out there. Has anyone worked with the idea of using an electric motor in the KR2 ?. Or would anyone have any good idea of where to start looking ?. Thanks Bobby Burington CAlifornia KR Builder
KR> Electric Fuel Pump Failure
Netters, A friend drag races a methanol 568 Big Block powered 74 Corvette, and recently has been having some lean-out problems that have un-characteristicly put him on the trailer early. His EGT has jumped from the normal 1100 degrees to over 1500 degrees, his plugs indicate a lean condition, and he's running much hotter coolant temps. He's running 1/2 inch fuel lines, and replaced the fuel filter at the beginning of the season. I suggested that he test the output of the fuel pump, and although he insisted that the fuel pressure was 6 psi, he finally decided to test the pump for fuel output volume. Bingo! the fuel pump was supplying less than 1/2 of the volume than specified. Just to be sure it was the pump, and not a clogged strainer, he pulled the strainer out of the fuel cell, and of course it was clean. How does this relate to a KR? Look at the failure mode: Higher than normal EGT's Higher than normal cylinder head temps/faster than normal temperature climb Plugs indicate lean condition High speed stumble May or may not show a drop in fuel pressure. Seems to me that the only time you would notice a drop in fuel pressure would be at times when the engine is in high power settings such as during take-off and climb. = Scott Cable KR-2S # 735 Wright City, MO s2cab...@yahoo.com __ Do you Yahoo!? Friends. Fun. Try the all-new Yahoo! Messenger. http://messenger.yahoo.com/
KR> electric start
new kr2'er looking for starter,alt,mtng plate ect.just don't like prop'n it. i think i have a 1600 motor #AE thanks mike blimka boise, idaho
KR> electric start
We use the Diehl accessory case with a geared starter. Can't personally vouch for it yet, but a lot of planes have used it. It has the alternator built in, but if you are going to require a lot of electric power, it might not provide enough charging. The starter works very well. 1600 is quite a small engine for a KR2. There is a time for building and a time for flying, and the time for building has long since expired. See N64KR at http://KR-Builder.org - Then click on the pics Daniel R. Heath - Columbia, SC See you in Mt. Vernon - 2004 - KR Gathering See our EAA Chapter 242 at http://EAA242.org
