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Walter:

The ram pressure at about 210 knots indicated is about one psi, and that
is about what you get into the little NACA scoops used to vent the
tank.  Fly at redline, 274 knots, and this becomes a bit less than 2
psi.  So you might as well find out now if they can hold 2 psi.  Expect
lots of creaking and groaning, I would think.

I have noted on several LIVs that then the sun grazes the wing from wing
tip to fuselage, you can see the top skin bulge up between wing ribs, so
there is some deformation occuring due to the pressurization, although
the top wing skin is also in compression during normal flight which
could also cause some of this effect.

Fred

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