Well, yes the fuel tanks will add stress to the WAF but only on the ground and during landing because in the out board panels they don't count towards the gross weight. With tanks in the stubs you have to watch your weight for take off , flight and landing because the weight is always on the fuselage, atleast in the outboard panels the wing is flying so the weight does not count. I have installed a lot of STC wing and tip tanks and they are a great improvement for range, but if will also make you more fuel concious, because you have to have the tip and wing tanks pretty much empty for landings.
David Mikesell 23957 N. Hwy 99 Acampo, CA 95220 209-609-8774 skyguy...@skyguynca.com www.skyguynca.com ----- Original Message ----- From: "Justin" <jmw...@socal.rr.com> To: "KRnet" <kr...@mylist.net> Sent: Monday, November 24, 2003 5:19 PM Subject: Re: KR>TANKS IN OUTER WINGS > I planned on putting the wing tanks in the stub wings. Outter wing tanks > didn't ever get my attention and as stated it add's stress onto the WAF's. > If I put 7 gallons in each wing and then my 5 gallon header tank I will have > myself a 2 hour airplane with a 45min reserve. My corvair is expected to > burn 7GPH @ 75%. The lancair that I have flown in had sight tubes for each > wing tank on the line going to the header tank and the normal header tank > sight tube. > > Undecided on how I will rig the wing tanks going to the header tank. > Rather I want the engine driven fuel pump to pump it all the time or have a > float type deal in the header tank. Im thinking more along the lines of it > filling all the time, i can see airbubbles when I know it's empty. Would > fuel guages be required in the wing tanks? > > Justin > N116JW > www.geocities.com/attngrabber14/Home > ----- Original Message ----- > From: "David Mikesell" <skyguy...@skyguynca.com> > To: "KRnet" <kr...@mylist.net> > Sent: Monday, November 24, 2003 9:50 AM > Subject: Re: KR>TANKS IN OUTER WINGS > > > > One thing to remember about wing tanks....while the nice thing is they > don't > > add to your flying gross weight because the wing is carrying them > internally > > no extra stress is applied to the WAF because they are not in the > fuselage, > > but when landing and the wings quite flying the weight is then added to > the > > stress on the WAF.......on wing tank mods for cert aircraft they tell you > > this in the STC and give you a maximum fuel landing weight. > > > > David Mikesell > > 23957 N. Hwy 99 > > Acampo, CA 95220 > > 209-609-8774 > > skyguy...@skyguynca.com > > www.skyguynca.com > > ----- Original Message ----- > > From: "Clancey D Krumwiede" <red-bri...@juno.com> > > To: <kr...@mylist.net> > > Sent: Monday, November 24, 2003 5:25 AM > > Subject: Re: KR>TANKS IN OUTER WINGS > > > > > > > Before designing your aircraft to carry fuel in the outer wings, here > are > > > a couple of issues to consider: > > > > > > 1) When dealing with the issue of loads on the WAF, you must also > > > consider the fact that by adding 60 pounds on the longest possible "arm" > > > from the WAFs, any flexing by the wing will or at least may place > > > enormous torque loads on the WAFs, possibly more than their design could > > > withstand. (read - wing failure) > > > > > > 2) Again, adding sixty pounds of "ballast" on the longest possible arm > > > from the longitudinal axis could greatly complicate spin recovery. > > > Remember, mass times acceleration equals momentum. It is quite possible > > > that after a two or three turn spin, you may not have enough rudder > > > authority to overcome the additional rotational momentum. (read - no > spin > > > recovery) > > > > > > > > > On Sun, 23 Nov 2003 21:24:49 -0800 "David Mikesell" > > > <skyguy...@skyguynca.com> writes: > > > > I did some calculations for tube tanks before and came to the > > > > conclusion > > > > that unless you can do a 11 to 12 in tube and it can be atleast 11 > > > > feet long > > > > you won't carry enough fuel to make any real difference. It takes > > > > atleast a > > > > 7 in diameter by 7 in length to make one gal...... > > > > > > > > David Mikesell > > > > 23957 N. Hwy 99 > > > > Acampo, CA 95220 > > > > 209-609-8774 > > > > skyguy...@skyguynca.com > > > > www.skyguynca.com > > > > ----- Original Message ----- > > > > From: "Lee" <l...@vandyke5.com> > > > > To: <kr...@mylist.net> > > > > Sent: Sunday, November 23, 2003 8:58 PM > > > > Subject: KR>TANKS IN OUTER WINGS > > > > > > > > > > > > I read some of the concerns about added fuel. Someone stated(last > > > > week I > > > > think) added fuel adds to the time in the cockpit. (small cockpit). > > > > I have > > > > been looking at options about added fuel. I have a dated KR with > > > > retracts. > > > > No room in the stub wing for added tanks. I have been looking at > > > > options of > > > > adding tanks in the outer wings. CG is a big part of my concern. > > > > My idea > > > > is to take an Aluminum tube 5 -6 inces in diameter and fit it into > > > > the void > > > > on the leading edge of the wing. I would like sone feed back from > > > > the > > > > group. > > > > > > > > Lee Van Dyke > > > > Mesa AZ > > > > l...@vandyke5.com > > > > > > > > > > > > _______________________________________________ > > > > see KRnet list details at http://www.krnet.org/instructions.html > > > > > > > > > > > > _______________________________________________ > > > > see KRnet list details at http://www.krnet.org/instructions.html > > > > > > > > > > > > > > > > > Keith C. Krumwiede > > > Rosedale, IN > > > > > > _______________________________________________ > > > see KRnet list details at http://www.krnet.org/instructions.html > > > > > > _______________________________________________ > > see KRnet list details at http://www.krnet.org/instructions.html > > > > > _______________________________________________ > see KRnet list details at http://www.krnet.org/instructions.html
