Subject: Bugatti 100P
From: rotaryeng
Date: 12/22/2012, 5:45 PM
To: AAAA-rotaryeng


http://www.lanasta.com/Shop/product/142/the-bugatti-100p-record-plane.html

Jim Rudholm

The drive shaft would have been a real problem as it was in the P39
originally until Alison and Bell worked out a solution.

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Another fatal flaw is the swept forward wing box spar.
This puts a torsional load on the spar carry through
that will cause the wing to flex in a vary unstable
manor. Particularly if the carry through is made from something
other than carbon fiber. A wood spar would be fatal as
wood has very low modulus of elasticity.

The tip of the wing will tend to increase in angle of attack
at high lift coefficients setting up a torsional flutter mode.

I also see no means of cooling the engine.

Paul Lamar


Paul,

The heat exchangers are in the tail forward of the empennage.  The inlets
are in the leading edges of the v-tail and the outlets are in the aft wing
root fairing.  The way they made the forward swept wing work on the X-29 is
they tailored the layup of the graphite so when the wing was loaded, the
wing would twist the other way.  I don't know if they thought of that but
that isn't a lot of forward sweep.  The FW-190 effectively has a forward
swept spar to make room for the landing gear without the cranked leading
edge like the P-51 had.

Steve Brazil

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