I am all for the periodic re-confirmation of the laws of physics :-)
Bubbles rise and oil falls.

Paul Lamar

Ok Paul,

I was hoping for a less cryptic explanation. I don't want to challenge Sir
Isaac Newton :-) I have looked at the return path of the oil and it appears
to me (perhaps wrongly) that the centrifugal forces on the oil in the rotor
would be much higher than the small gravity vector of 1G. If the oil pickup
for a dry sump is located properly how is this a problem? Return oil in a
dry sump is usually mixed with a good deal of air anyway, the tank should be
designed to separate this. Does someone on the list have some experience
with aircraft or automotive dry sumps?

Monty

See Jon's explanation above.

Paul Lamar
 
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