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Aerobatics ServerACRO E-mail Archive Thread: [IAC-L:590] S-1S weight and balance[International Aerobatic Club] [Articles etc] [Communications] [Contest and Patch Information] [Aviation Organizations] [Other Aerobatics Info] [Aerobatics Images] [Other Aerobatics Links] [Other Aviation Info (including weather)] [Search ACRO Website]Disclaimer: These aerobatics pages are developed by individual IAC members and do not represent official IAC policy or opinion. |
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Thread: [IAC-L:590] S-1S weight and balance
Message: [IAC-L:590] S-1S weight and balance
Follow-Up To: ACRO Email list (for List Members only)
From: N77TW at aol.com
Date: Tue, 29 Jul 1997 00:59:38 UTC
Since I'm still missing some posts, I may be speaking out of turn and/or may not have the story right. However, for what it's worth... when I read a post regarding putting 30 lbs. in the tail, I recalled having read, some time ago, a report on an S-1 which was in C.G. but had a lot of lead strapped to the fail wheel. Although, it was in C.G. mathematically, when in a fully developed spin, it failed to recover due to the tail weights being on such a long lever arm. Correct me if I'm wrong, but it would seem, and I'm no engineer, that calculating C.G. on a static basis give one answer, but when rotational momentum is added to the equation, the answer is different. I know, for instance that the Siai Marchetti SF-260 is fully aerobatic but restricted to no akro if there is fuel in the tip tanks, and my S-2B is restricted if there's fuel in the top wing header tank, I assume for the same reason. Might be something to consider when adding tail weight if it's literally added a far aft station. Bill Bancroft n77tw at aol.com
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