On Mon, 23 May 2005 22:26:11 GMT, Gary Emerson
wrote:

Hopefully thermal expansion will not become an issue....splitting a wing
open because it warmed up in the sun could ruin your day.... Your
"check valve" has the potential to allow such a situation...

This is very likely to happen. I once heard a report of a pilot (iirc
Helmut Grix) who had plugged his water drains before he went up in a
wave. The over-pressure of the air in his waterbags broke his wing
shells in the thinner air - he needed completely new wings afterwards.


Bye
Andreas