"Morgans" wrote in message
...

wrote

Unless that engine is really tight (pretty much zero ring
leakage) he'll end up with backpressure in the crankcase and will blow
the front crank seal out, losing oil at a good clip

I agree.

How come airplane engines don't have PCV valves, plumbed back into the
intake manifold, like cars? You could even use an oil separator, before
the gas enters the manifold, if too much oil was worried to be a problem.

An arrangement like that would solve the oily discharge on the belly, I
would think.

Might even keep the intake valves lubricated a little bit! g

I wonder what the answer is, and why that solution would be a problem.
I'm sure it has been tried, since it seems there is truly nothing new
under the sun, when it comes to airplanes.


A) They don't have to.

B) PCV as found on automobiles won't work well at higher loads (no vacuum),
but new sytems for large diesel trucks are now coming onto the market to
meet emission standards - they have the same lack of vacuum...

--
Geoff
The Sea Hawk at Wow Way d0t Com
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