Paul.  I seem to be getting too much oil into my PSRU making the return
line pressurised.  You said that the Lou Ross PSRU had a restriction
into his PSRU.  Do you know roughly the size of that hole?

Neil Unger

Depends on the design and whether the ring gear rotates or not..
Also if the prop shaft has roller bearings.

You are on the bleeding edge.

One of Tracy's pressure fed plain bearing GB's had no re-stricter. Just an AN-4 oil pressure feed line.

The oil flow return came out of two  AN-4  lines and went back into the oil pan
above the oil level.

This one was a 2.13 to one so the ring gear was rotating. That was taken advantage
of to pump the oil out of the gear box by friction.

Paul Lamar



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