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
