aerobubba(at)earthlink.ne
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 Posted: Fri Mar 31, 2006 6:57 pm Post subject: RV-List Digest: 51 Msgs - 03/30/06 |
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Hi Kevin-
| Quote: | I don't see wing bending loads as a major issue, considering how
people will fly the aircraft when there is fuel in the tip tanks. If
the wing is designed to take 6gs without tip tanks, surely it can
easily handle a typical cruise flight load spectrum with fuel in the
tips. What am I missing?
I concur with all you have written. However, aside from the instantaneous loading the wing experiences, there is also the issue of fatigue. Reducing the bending moments that the center section experiences will increase it's fatigue life.
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In all likelihood, and given the way most aspects of RV's are overbuilt, this is a moot point. Then again we won't know for sure until it's to late. I seem to recall spar issues cropping up with older -3's that resulted in a mod. Likewise Be-18's, T-34's, T-6's. Yes, those are all old military aircraft that have been ridden hard and put away wet. Then again, that's just what they were designed for. Given that I plan on operating my aircraft for a looong time, and that to my knowledge RV wings weren't designed for tip tanks, I think considering the long term effects of operating with tip fuel is in order. As such, and all other things being equal, using the inboards first can't hurt and might help.
Regardz-
Glen Matejcek
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