List & John Burk -
"No air, no bubbles" ? Having watched a great many rebuild thrashes at
Heartland Park and Mile High I can tell you from experience that the oil that
comes out of a nitro motor after a pass looks like a couple gallons of frothy
yellow snot. Perhaps the aim was to eliminate bubbles, but there is definitely
air introduced into the oil - in great quantities.
My guess is the combination of G-forces forcing the oil backward, plus the
high pressure in the crankcase from supercharger blow-by enables aeration of
the lubricating fluid as the crank and rods twirl madly.
Chris Pile aka aircap
|