Udo Rumpf wrote:
Has anybody experience with central venting like an ASW 24 but with a
hard
tank. I am preparing the internals of the wings and I would like to
vent
three tanks in on wing independently and join the three vents lines
at a manifold at the root rip and then with a single line up to the
deck.
Comments please.
Regards
Udo

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Reply:
Put in big vents and keep 'em short. If you don't do it now, you will
later.
If practical on your installation, the best way from a dumping
standpoint is bottom mounted vent at outboard end of each tank with
check valve so air goes in and water does not come out.
Keep in mind that flow resistance through a line is inversely
proportional to the 4th power of diameter and linear with length.
Schleicher increased the venting on '27B's when we showed that flow was
choked.
UH