KR> Antennas
Good evening, again, I've been going through the archives and found some lite information about antennas. Are you guys mounting the antennas inside of the aircraft? I have a comm/nav antenna, and a transponder antenna. What have you guys found was a good place to mount them? Thanks! Trevor
KR> Canopy/Seat
Good evening, I've been able to finish my seats, and I am very pleased with the results.However (you know how it is when someone says "however") I sat in the airplane (and, yes, I'll admit to making airplane noises too) and I lowered the canopy-the result was needing to cock my head to the right in order to close it completely. Now, my question is three-fold: First, the seat itself is kind of like Mark Langford's in the design and installation of the base product. Where it differs is the upholstery adds about 3 inches to my height. Now, I'm only 5'5" so I should fit nicely in the aircraft. So, my first question is should I recess the seat farther down so that it's lower than the aft spar? It would mean re-building the seats from scratch because of how the supports are developed. There is no structural supports on the floor of the aircraft at all (which presented the challenge to begin with). Secondly, What are people's thoughts about raising the canopy? Has anyone ever tried it? What trouble am I looking at to do this? Thirdly, instead of trying to reinvent the wheel, how would one go about reclining the seat so that I can have more head clearance without losing visibility? In this situation, what would you guys recommend? Any of you found that you're too tall for the setup? How did you overcome that? Thanks! Trevor
KR> Electrical System
The Diehl alternator setup on my plane is the old single phase system, and is a permanent magnet ring mounted to the flywheel, with a bunch of coils surrounding it (bolted to the case). The regulator has two AC inputs from the coils, and one output to the battery. I'm pretty sure the coils and magnets are from an Onan generator. It delivers an amazingly steady 14.5V output, and charges anywhere north of 1500 rpms. I have a couple of $1 50A Schottkey diodes that manage the backup battery charging and isolation from the main system. That backup battery is constantly being charged by the alternator (as is the main battery), but a drain on the main side won't hurt the backup side. They are rated at a current that will act as a fuse in case of a short in the main system, isolating the backup from the main. I'm quite happy with the failsafe nature of the system, and the price was right... Mark Langford ML at N56ML.com http://www.n56ml.com
KR> Electrical System
I do not know any thing about the John Deer alternators. The Diehl alternator consists of permanent magnet array bolted to the fly wheel, a set of coils with iron cores bolted to the Diehl adapter case and a quite small regulator usually mounted on the firewall. Two wires from the adapter case hookup to the regulator. One wire is for the field and the other wire is for the alternator output. Without the field wire connected, the alternator has no output. The field and output returns are through the grounded adapter case. A rectifier array in the case converts the alternating current from the coils to direct current. The only moving part is the magnet assembly. The regulator is all solid state; it does need some cooling and does get that in conjunction with the electronic ignition module cooling air blast. There are no bearings or brushes in the system. The VW crank shaft bearings are used as the alternator bearings. The Diehl alternator is rated for 20 amps output continuous operation. The alternator can produce higher outputs, but will incur overheating problems resulting in insulation breakdown and rectifier burnout. My installation allows air to enter at the magneto mounting location and exit at the starter pinion area on the engine transmission mounting flange. The spinning motion of the fly wheel does pump a lot of air past the alternator. My Dynon D10A has a system voltage readout. An instrument panel mounted load meter displays current output from the alternator. The regulator holds the system voltage to a consistent 14.2 VDC at full battery charge. With every electrical item on line, transponder and VHF radio transmitting, and engine WOT the current output from the alternator is 18 amps. The batteries are still floating. Granted, charging a down battery while running full electrical load may tax the alternator. However, the electric fuel pump is only needed for starting the engine. WOT is limited to 2 minutes at a time due to engine over heating, as recommended by Steve Bennett. Landing lights are not used continuously. With those considerations and at 75% power, the system current load goes to 10 amps. I consider that a reasonable continuous operation design. What could go wrong? Could get excess current outputs by shorting the output to ground, battery failure or alternator failure. If the output current goes high enough the 35 amp circuit breaker would trip and take the alternator and regulator off line. For what ever reason, such as overvoltage, I can disconnect the alternator from the system by manually pulling the breaker. Power is only produced if there is a current flowing. Inductive voltage spikes can be destructive to the system. Batteries do a great job limiting voltage spikes. Using a crowbar type circuit protection is definitely not recommended: that will short out the battery. Sid Wood Tri-gear KR-2 N6242 Mechanicsville, MD, USA -- What kind of alternator is that VW Diehl alternator? Is it field regulated aka most cars or a permanent magnet dynamo with regulator aka the small John Deere or Kubota tractors? Cheers John John Martindale 29 Jane Circuit Toormina NSW 2452 Australia Cc: Sid Wood I have used the Expbus for 5 years on my KR-2. I added a 35 amp circuit breaker for the VW Diehl alternator rated at 20 amps. .sheep shears -- Hmmm, in which case having a 35amp circuit breaker in its unregulated output is pointless. It will never trip because the dynamo at 20 amp rating is incapable of supplying that current in the first place unless it goes into substantial overspeed. What should be included is over-voltage protection across the regulated output that breaks (or shunts) the circuit in the event of regulator failure. Breaking unregulated output by circuit breaker or simple switch generates huge voltages in the dynamo coils that could break down the insulation around the wires in it because the power from the coils spinning in the non-adjustable non turn offable magnetic field has nowhere else to go. You should never spin a dynamo without somewhere for the excess power to go...even if it just literally a "crowbar" across the output. Alternators are very different because the coils are energised to produce the field (as opposed to magnet) and can thus be turned off. Spinning of the armature thus has no output and no adverse impact. John Martindale - From: It is a permanent magnet generator. If I recall correctly it is a John Deer part. ---
KR> WTB KR1 Boat stage
Got a kr2 boat with a lot of stuff, if interested contact me off net. IHS PaTS Seminary MS > On Oct 2, 2015, at 15:09, Chris Prata via KRnet > wrote: > > hi all, just throwing it out there that if an affordable original spec (no > significant changes) kr1 boat stage project turns up, I'd be interested to > take a look. > > thanks > > ___ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options >
KR> WTB KR1 Boat stage
hi all, just throwing it out there that if an affordable original spec (no significant changes) kr1 boat stage project turns up, I'd be interested to take a look. thanks
KR> Electrical System
Hmmm, in which case having a 35amp circuit breaker in its unregulated output is pointless. It will never trip because the dynamo at 20 amp rating is incapable of supplying that current in the first place unless it goes into substantial overspeed. What should be included is over-voltage protection across the regulated output that breaks (or shunts) the circuit in the event of regulator failure. Breaking unregulated output by circuit breaker or simple switch generates huge voltages in the dynamo coils that could break down the insulation around the wires in it because the power from the coils spinning in the non-adjustable non turn offable magnetic field has nowhere else to go. You should never spin a dynamo without somewhere for the excess power to go...even if it just literally a "crowbar" across the output. Alternators are very different because the coils are energised to produce the field (as opposed to magnet) and can thus be turned off. Spinning of the armature thus has no output and no adverse impact. John Martindale 29 Jane Circuit Toormina NSW 2452 Australia ph:61 2 6658 4767 m:0403 432179 email:john_martindale at bigpond.com web site: -Original Message- From: KRnet [mailto:krnet-bounces at list.krnet.org] On Behalf Of brian.kraut--- via KRnet Sent: Friday, 2 October 2015 11:39 AM To: KRnet Cc: brian.kraut at eamanufacturing.com Subject: Re: KR> Electrical System It is a permanent magnet generator. If I recall correctly it is a John Deer part. Original Message Subject: Re: KR> Electrical System From: John Martindale via KRnet List-Post: krnet@list.krnet.org Date: Thu, October 01, 2015 1:43 pm To: "'KRnet'" Cc: John Martindale Hi Sid What kind of alternator is that VW Diehl alternator? Is it field regulated aka most cars or a permanent magnet dynamo with regulator aka the small John Deere or Kubota tractors? Cheers John John Martindale 29 Jane Circuit Toormina NSW 2452 Australia ph:61 2 6658 4767 m:0403 432179 email:john_martindale at bigpond.com web site: -Original Message- From: KRnet [mailto:krnet-bounces at list.krnet.org] On Behalf Of Sid Wood via KRnet Sent: Friday, 2 October 2015 1:31 AM To: krnet at list.krnet.org Cc: Sid Wood Subject: Re: KR> Electrical System I have used the Expbus for 5 years on my KR-2. I added a 35 amp circuit breaker for the VW Diehl alternator rated at 20 amps. .sheep shears - No virus found in this message. Checked by AVG - www.avg.com Version: 2015.0.6140 / Virus Database: 4435/10737 - Release Date: 10/01/15 ___ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org please see other KRnet info at http://www.krnet.org/info.html see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options ___ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org please see other KRnet info at http://www.krnet.org/info.html see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options - No virus found in this message. Checked by AVG - www.avg.com Version: 2015.0.6140 / Virus Database: 4435/10739 - Release Date: 10/01/15 - No virus found in this message. Checked by AVG - www.avg.com Version: 2015.0.6140 / Virus Database: 4435/10739 - Release Date: 10/01/15
KR> KRnet Digest, Vol 3, Issue 260
I have a kr2 converted to a 1. It is at hicks T67 6 miles west of alliance and 6 miles. 6 miles north of Meacham. Sent from my iPhone > On Oct 2, 2015, at 11:00 AM, krnet-request at list.krnet.org wrote: > > Send KRnet mailing list submissions to >krnet at list.krnet.org > > To subscribe or unsubscribe via the World Wide Web, visit >http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org > or, via email, send a message with subject or body 'help' to >krnet-request at list.krnet.org > > You can reach the person managing the list at >krnet-owner at list.krnet.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of KRnet digest..." > > > Today's Topics: > > 1. Re: Electrical System (Jeff Scott) > 2. Re: Electrical System (John Martindale) > 3. Re: Electrical System (brian.kraut at eamanufacturing.com) > 4. Re: Electrical System (John Martindale) > 5. Re: Electrical System (Mike Arnold) > > > -- > > Message: 1 > Date: Thu, 1 Oct 2015 19:21:56 +0200 > From: "Jeff Scott" > To: krnet at list.krnet.org > Subject: Re: KR> Electrical System > Message-ID: > 3capp-mailcom-lxa06> > > Content-Type: text/plain; charset=UTF-8 > > > >> Most mechanical circuit >> breakers are rated for 10,000 trip cycles. >> >> Sid Wood >> Tri-gear KR-2 N6242 >> Mechanicsville, MD, USA >> -- > > > If my mechanical circuit breakers are getting close to 10,000 trip cycles, I > have done something very wrong... > > Real world failures of mechanical circuit breakers seem to be more related to > corrosion on the contacts creating a voltage drop across the breaker. I've > seen that a number of times in 1960s vintage aircraft. That is an issue one > should never see with electronic breakers. Of course your mechanical > breakers need to age for about 40 or 50 years before that becomes a problem. > > Not really my cup of tea, but for those that like an electronic panel. > Vertical Power seems to be the favored company if one wants to use electronic > breakers. Their VP-X Sport and VP-X Pro series units integrate with a number > of EFIS displays, so can be controlled from the EFIS. Their stuff isn't > cheap, but it works quite well. The vertical power unit also integrates a > lot of whiz bang capability as well by giving you the capability to program > it to not allowing flaps to extend above a certain speed, or warn you if you > exceed your flap speed with them deployed, can control your trim, operates > the landing lights as Wig-Wags, and allows each circuit to be programmed > individually for the electronic circuit breaker trip current. Lots of bells > and whistles for those that want to program their airplane. > > -Jeff Scott > Los Alamos, NM > > > > -- > > Message: 2 > Date: Fri, 2 Oct 2015 06:43:24 +1000 > From: "John Martindale" > To: "'KRnet'" > Subject: Re: KR> Electrical System > Message-ID: > Content-Type: text/plain; charset="us-ascii" > > Hi Sid > > What kind of alternator is that VW Diehl alternator? Is it field regulated > aka most cars or a permanent magnet dynamo with regulator aka the small John > Deere or Kubota tractors? > > Cheers John > > John Martindale > 29 Jane Circuit > Toormina NSW 2452 > Australia > > ph:61 2 6658 4767 > m:0403 432179 > email:john_martindale at bigpond.com > web site: > -Original Message- > From: KRnet [mailto:krnet-bounces at list.krnet.org] On Behalf Of Sid Wood via > KRnet > Sent: Friday, 2 October 2015 1:31 AM > To: krnet at list.krnet.org > Cc: Sid Wood > Subject: Re: KR> Electrical System > > I have used the Expbus for 5 years on my KR-2. I added a 35 amp circuit > breaker for the VW Diehl alternator rated at 20 amps. .sheep shears > > > > - > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2015.0.6140 / Virus Database: 4435/10737 - Release Date: 10/01/15 > > > > > -- > > Message: 3 > Date: Thu, 01 Oct 2015 18:39:15 -0700 > From: > To: "KRnet" > Subject: Re: KR> Electrical System > Message-ID: ><20151001183915.31a5f8c871d0e3389177406b4aec562c.e72f563f6f.wbe at > email04.secureserver.net> > > Content-Type: text/plain; charset="utf-8" > > It is a permanent magnet generator. If I recall correctly it is a John > Deer part. > > > Original Message > Subject: Re: KR> Electrical System > From: John Martindale via KRnet > Date: Thu, October 01, 2015 1:43 pm > To: "'KRnet'" > Cc: John Martindale > > Hi Sid > > What kind of alternator is that VW Diehl alternator? Is it field > regulated > aka most cars or a permanent magnet dynamo with regulator aka the small > John > Deere or Kubota tractors? > > Cheers John > > John Martindale > 29 Jane Circuit > Toormina NSW 2452 >
KR> Electrical System
Any KR 2 in N Tx? On Oct 1, 2015 11:12 PM, "John Martindale via KRnet" wrote: > Hmmm, in which case having a 35amp circuit breaker in its unregulated > output > is pointless. It will never trip because the dynamo at 20 amp rating is > incapable of supplying that current in the first place unless it goes into > substantial overspeed. > > What should be included is over-voltage protection across the regulated > output that breaks (or shunts) the circuit in the event of regulator > failure. Breaking unregulated output by circuit breaker or simple switch > generates huge voltages in the dynamo coils that could break down the > insulation around the wires in it because the power from the coils spinning > in the non-adjustable non turn offable magnetic field has nowhere else to > go. You should never spin a dynamo without somewhere for the excess power > to > go...even if it just literally a "crowbar" across the output. > > Alternators are very different because the coils are energised to produce > the field (as opposed to magnet) and can thus be turned off. Spinning of > the > armature thus has no output and no adverse impact. > > John Martindale > 29 Jane Circuit > Toormina NSW 2452 > Australia > > ph:61 2 6658 4767 > m:0403 432179 > email:john_martindale at bigpond.com > web site: > -Original Message- > From: KRnet [mailto:krnet-bounces at list.krnet.org] On Behalf Of > brian.kraut--- via KRnet > Sent: Friday, 2 October 2015 11:39 AM > To: KRnet > Cc: brian.kraut at eamanufacturing.com > Subject: Re: KR> Electrical System > > It is a permanent magnet generator. If I recall correctly it is a John > Deer part. > > > Original Message > Subject: Re: KR> Electrical System > From: John Martindale via KRnet > Date: Thu, October 01, 2015 1:43 pm > To: "'KRnet'" > Cc: John Martindale > > Hi Sid > > What kind of alternator is that VW Diehl alternator? Is it field > regulated > aka most cars or a permanent magnet dynamo with regulator aka the small > John > Deere or Kubota tractors? > > Cheers John > > John Martindale > 29 Jane Circuit > Toormina NSW 2452 > Australia > > ph:61 2 6658 4767 > m:0403 432179 > email:john_martindale at bigpond.com > web site: > -Original Message- > From: KRnet [mailto:krnet-bounces at list.krnet.org] On Behalf Of Sid Wood > via > KRnet > Sent: Friday, 2 October 2015 1:31 AM > To: krnet at list.krnet.org > Cc: Sid Wood > Subject: Re: KR> Electrical System > > I have used the Expbus for 5 years on my KR-2. I added a 35 amp circuit > breaker for the VW Diehl alternator rated at 20 amps. .sheep shears > > > > - > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2015.0.6140 / Virus Database: 4435/10737 - Release Date: > 10/01/15 > > > ___ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to > change options > > ___ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options > > > - > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2015.0.6140 / Virus Database: 4435/10739 - Release Date: 10/01/15 > > > > - > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2015.0.6140 / Virus Database: 4435/10739 - Release Date: 10/01/15 > > > ___ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options >
KR> Electrical System
Hi Sid What kind of alternator is that VW Diehl alternator? Is it field regulated aka most cars or a permanent magnet dynamo with regulator aka the small John Deere or Kubota tractors? Cheers John John Martindale 29 Jane Circuit Toormina NSW 2452 Australia ph:61 2 6658 4767 m:0403 432179 email:john_martindale at bigpond.com web site: -Original Message- From: KRnet [mailto:krnet-bounces at list.krnet.org] On Behalf Of Sid Wood via KRnet Sent: Friday, 2 October 2015 1:31 AM To: krnet at list.krnet.org Cc: Sid Wood Subject: Re: KR> Electrical System I have used the Expbus for 5 years on my KR-2. I added a 35 amp circuit breaker for the VW Diehl alternator rated at 20 amps. .sheep shears - No virus found in this message. Checked by AVG - www.avg.com Version: 2015.0.6140 / Virus Database: 4435/10737 - Release Date: 10/01/15
