Preheating engines: Airplane engines versus auto engines

A fun science experiment is to put a small amount of water in the
bottom of a 1 gallon rectangular can. Boil it for a few minutes to
displace the air inside, remove it from the heat, and immediately
replace the cap and watch.

For more excitement, repeat with another can only this time cap it and
sprinkle cold water on the outside of the can too.

(Hint - don't plan on using the cans again.....!)

* * * * My experience is as an aircraft mechanic.

Thanks for a great primer, Dan.
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"

"nrp" wrote in message
...
...
A lot of this moisture accumulation problem would go away if aircraft
engines had a positive crankcase ventilation (PCV) system like car
engines now do, but they don't for whatever reason. I suspect part of
the reason car engines now last so much longer is due to the PCV
system.

Talking to one of the "old guys" at work some years ago this came up - his
claim was that when PCV was first required, they were worried about
re-cycling all the "gunk" and damaging the engines - but testing (and
eventually field experience) showed that keeping the crankcase ventilated
resulted in a significant boost in engine durability. He referred to PCV as
one of the best things to come along...

Conventional auto style PCV won't work well on an aircraft engine due to the
lack of vacuum in the manifold to generate the air flow.

--
Geoff
The Sea Hawk at Wow Way d0t Com
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