Any aircraft engine crankcase I've been inside of has relatively small
slots below the crank where the case halves meet effectively isolating
the sump from the crank in regard to "windage".

Ah! The man who truly *knows* weighs in!

:-)

So how 'bout it, TC -- is the M20 a good thing, a bad thing, or 'bout the
same thing with regards to my O-540?
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"