Hi Doug My comment was a generalised one and I had forgotten that RR has an option for tanks in the outer. I agree, tanks in an extended inner would be no different and maybe better. Sorry to have misled.
Nontheless, I would be interested to know how a KR behaves in a spin with fuel only in the outer tanks. Anyone tried it. :-) Feelin embarassed here John. ----- Original Message ----- From: "Doug Rupert" <drup...@sympatico.ca> To: "'KRnet'" <kr...@mylist.net> Sent: Friday, January 27, 2006 4:26 PM Subject: RE: KR> Spar length Obviously I'm missing something here John. Kindly explain the difference between a properly baffled fuel tank in the stub wings versus the same tank in the outer wing panels. It would seem to me that if wing drop is your concern that the same weight further out would have more of a detrimental effect for spin recovery, not that anyone in their right mind would intentionally spin a KR. In any event, spin recovery maneuvers are identical no matter where the fuel is located. I'd be more worried about the c.g. shift associated with the header tank. As for extending the stub wings, it would be a snap with the AS 5048 airfoil as the spar is deeper. Using the stock per plans spar and airfoil I think the added stress would easily be overcome by wrapping both inner spars with a couple of layers of CF. I'm not an engineer by any means but it seems to make sense should one want to attempt such a change. If it were me I would go with the 5048 airfoil and build the sucker. I would have absolutely no hesitation on taking it into the air as with the added depth of the spar I think the WAF would now be the weak link in such an arrangement. Doug Rupert Caution. Spin recovery can be affected if the extra distance is used for tanks. My view....Stick to what is proven, that is, stock stub length. John -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.371 / Virus Database: 267.14.21/236 - Release Date: 1/20/2006 -------------------------------------------------------------------------------- > _______________________________________ > 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
