KR> Tip tanks
Outboard tanks, tips or not, increase the structural ability of the wing to handle sudden increases in lift. Tip tanks, if canted like the later 310's for instance, are thought to decrease tip drag. The KR wing is strong enough that carrying fuel in the tips isn't relevant for strength issues, to my mind. And disturbing the tip vortice is more easily done than by building a fake tank. If someone wants to do it though, why not? Potential imbalance issues can be provided for easily. Mike KSEE Get Free Email with Video Mail & Video Chat! http://www.juno.com/freeemail?refcd=JUTAGOUT1FREM0210
KR> Fly your KR
I sent this to the net a few days ago and it never came back, I'm sending it again. Sorry if you get it twice. Hey Guys, If your needing a flyin destination this weekend ? SERFI is this weekend in Evergreen Al. A great place to be Saturday. Our Birmingham EAA Chapter will be working it again this year. See ya there. Mike Sylvester kr2s builder Birmingham,AL. Cell no.205-966-3854
KR> 6 year anniversary
Hey Guys,Today is the 6 year anniversary of the first flight of 357CJ with the 3100 corvair. I was hoping to get a morning flight in to celebrate but heavy rain, strong winds, and ceilings lower than a snakes belly all went against it. Anyway it has been some of the best 6 years of my life, I have a total of 646 hours and over a 1000 landings. I have flown around 80,000 miles (645 x 125 mph). I have had a few hick ups but never gave up. I feel this is the privileged life, I don't need Warren Buffets means to have it all, Great friends, great travel, great opportunity to share with my kids, Great plane and engine that started it all. I stood in the hanger the other day after a flight and just said out loud "I love my plane" There is so much fun out there to be had. Get out in that shop today, file something, cut something, glue something, assemble something, anything-- one part at a time and all of a sudden one day you look around and there aren't any more parts left over but there is a magic carpet sitting there in what ever form you had imagined it to be. It will be great! it will be beautiful! It will be your ride into a whole new world. Be brave and bold, move forward today.Joe Horton,Coopersburg, Pa. The Next Internet Boom Stock Investment with 1,000% Potential Gains. http://thirdpartyoffers.juno.com/TGL3141/4e9f20a5ccd9f004d7st04duc
KR> Tip tanks
Scott wrote: I can tell you for a fact that a 60 lb imbalance between tanks with them located at the inboard end of the wing panels is quite significant. I tested that condition in my KR. I'd sure hate to have to try to land a KR with a 60 lb imbalance at the wing tips. So I'll ask the question a bit differently. Other than the coolness factor or asthetic look of tip tanks, what would be the motivating factor for moving fuel farther outboard in the wing where it can create a potentially fatal imbalance condition when there is adequate space to build tanks where it can be safely carried closer to centerline? Perhaps I'm just a bit thick, but I don't see the advantage. [Fred Johnson] Scott, there are two reasons I have considered it besides the extra fuel. One, as Pazmany pointed out in his book, safety. The farther away from the occupants fuel is, the less likely it will be an issue if a crash were to happen (excluding, as you have pointed out, being the cause of an accident). Second, is tip tanks have two other advantages; wing tanks increase the effective aspect ratio, and two, they reduce wing tip vortices and hence reduce drag, much like a winglet does. So, besides being able to add more fuel, we have increased the wings efficiency. I'm not saying it doesn't have it's draw backs, I'm just curious as to everyone's comments and experiences with them. also, the T33/ F80 had wing tanks, and the few pilots I have know who flew them didn't indicate any issues with them? perhaps I'm wrong? I can forward a PDF copy of Pazmany's book if you want? Fred Johnson Reno, NV
KR> Tip tanks
I can tell you for a fact that a 60 lb imbalance between tanks with them located at the inboard end of the wing panels is quite significant. I tested that condition in my KR. I'd sure hate to have to try to land a KR with a 60 lb imbalance at the wing tips. So I'll ask the question a bit differently. Other than the coolness factor or asthetic look of tip tanks, what would be the motivating factor for moving fuel farther outboard in the wing where it can create a potentially fatal imbalance condition when there is adequate space to build tanks where it can be safely carried closer to centerline? Perhaps I'm just a bit thick, but I don't see the advantage. Jeff Scott Los Alamos, NM - Original Message - From: Fred Johnson Lastly, I haven't read any accounts of the Pazmany aircraft who use only wing tanks of having the same issue as the twins? Not to mention that we are talking about roughly only 60 pounds of fuel in each tank, though on a KR that might seem like a lot. Fred Johnson Reno, NV
KR> Tip tanks
Jeff wrote: "As Victor points out with the Cessna twin tip tanks, they may look cool, but they come at a pretty high cost to safety. Carrying tip tanks gives you the capability whether by accident or by mechanical failure to have the lateral balance so far out that the plane becomes uncontrollable at slow speed. Why create a safety problem when the same volume of fuel can be safely carried either in the wing stub, or the inboard section of the outer wing panel? Part of the flight testing on my KR included slow flight and landings with one wing tank full and the other empty. I designed the tank loads specifically to ensure the plane was always controllable regardless of the fuel load and configuration. Even with my wing tanks located at the inboard end of the wing panels, it doesn't take but a few gallons of imbalance for the plane to start to fly wing heavy towards the fuller side. " I agree, if that is your only fuel source, but if it's used as additional fuel source for long range flights, and the fuel is transferred to your main tanks, or burned directly. Also, so they drain simultaneously, you can run both tanks to a single pump to be used directly by the engine or to transfer to the main tanks. Most likely it would be easier to just burn the fuel directly. Lastly, I haven't read any accounts of the Pazmany aircraft who use only wing tanks of having the same issue as the twins? Not to mention that we are talking about roughly only 60 pounds of fuel in each tank, though on a KR that might seem like a lot. Fred Johnson Reno, NV
KR> Tip tanks
. Creating conditions to get you an unrecoverable spin or an uncontrollable wing heavy condition at landing speed are things that can get you killed. Jeff Scott Los Alamos, NM Jeff is spot on here. Just think if they had only three gallons each and for our purpose fuel weighs in at 6 LBS a gallon. If your fuel don't transfer out of one tank you got 18 lbs sitting on the wing tip. When you get slow the plane is going to be like a teeter-totter. On final is not the place to practice spin recovery. I don't care how good you think you are it only takes one time. Some of the best pilot of our time are no longer with us because of one mistake why increase our odds. Build smart...fly safe..
KR> Tip tanks
As Victor points out with the Cessna twin tip tanks, they may look cool, but they come at a pretty high cost to safety. Carrying tip tanks gives you the capability whether by accident or by mechanical failure to have the lateral balance so far out that the plane becomes uncontrollable at slow speed. Why create a safety problem when the same volume of fuel can be safely carried either in the wing stub, or the inboard section of the outer wing panel? Part of the flight testing on my KR included slow flight and landings with one wing tank full and the other empty. I designed the tank loads specifically to ensure the plane was always controllable regardless of the fuel load and configuration. Even with my wing tanks located at the inboard end of the wing panels, it doesn't take but a few gallons of imbalance for the plane to start to fly wing heavy towards the fuller side. Additionally, while most pilots don't spin their KRs, the enertia of a load of fuel mounted at the outboard end of the wing will make spin recovery significantly more difficult. These are very real safety issues with tip tanks. Creating conditions to get you an unrecoverable spin or an uncontrollable wing heavy condition at landing speed are things that can get you killed. Jeff Scott Los Alamos, NM
KR> Tip tanks
I have about 500 hours in Cessna 421's and 414's as well as a lot of time in 310's. In all of these there is a fuel pump in the aft end of the tank that moves fuel from the front to the back of the tank where the pickups are. These pumps run all the time. These are the main tanks on all of these airplanes ie you takeoff and land on the tips. In these aircraft loosing a pump means you will loose an engine on that side as soon as you pitch down. In all but especially in the 421 loosing a tip tank fuel pump means terminating the flight. You can crossfeed for a while until you run out of aileron. More than half of all crashes in the 421 have been from fuel starvation while having plenty of fuel onboard. Bottom line, they look great, they work great. However there MUST be a method of transferring fuel between the two rather than an equalizing tube. The reason is that should you have an unequal fuel flow and correct it with aileron you won't know you are in trouble until you slow down and discover that you don't have enough aileron. Victor Taylor Irvington, Alabama Sent from my iPhone
KR> tip tanks
I liked the looks of tip tanks and have some fake ones made them to go onto my wings. Dave Mullins Nashua, NH Fred Johnson wrote: > Rudi wrote: > > "Sakkie's plane with tip-tanks, ZS-UKU, is currently being restored after > standing for many years, more information available here: > http://www.avcom.co.za/phpBB3/viewtopic.php?f=100=79408[Fred Johnson] " > > > > This is great. I have been reading Pazmany's article about the PL-1 and it > got me thinking about this on a KR. According to him, they increase wing > efficiency the same as winglets. They also increase the aspect ratio. > > Does anyone know if his tip tanks actually held fuel? > > > > Fred Johnson > Reno, NV > > > ___ > 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> POT OHM OR K?
Well actually Jeff, the current in the circuit stays the same. Refer http://www.allaboutcircuits.com/vol_1/chpt_5/2.html The brightness is a function of power (watts) which equals volts times amps. Since amps remain the same, a resistor/rheostat drops the voltage across the bulb thus dimming it. The associated voltage drop across the resistor times the amps equals the watts that the resistor must give off as heat. The sum of the voltage drops must equal the voltage of the battery (12volts). In summary, electrons out of a battery terminal equals electrons in at the other. Those little fizzers have to go somewhere :-). John Martindale 29 Jane Circuit Toormina NSW 2452 Australia ph:61 2 6658 4767 m:0403 432179 email:john_martind...@bigpond.com -Original Message- From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net] On Behalf Of Jeff York Sent: Wednesday, 19 October 2011 2:46 AM To: KRnet Subject: Re: KR> POT OHM OR K? Ok, It has been a long time since I was in Electrical Engineering 101. .snip
