Dave Stadt wrote:
: How come the engine in my car with 190,000 miles is running fine with no
: signs of undue wear with nary a single preheat. It is often started at
: temps well below 0 F. Aluminium block, steel crank, steel cylinder liners
: and aluminium pistons same as the ole Continental.

Two words: Liquid cooling. Everything about the aircraft engine is catered to
running at ridiculously high temperatures during normal operation. The oil is very thick
so it still lubricates at high temperatures and carries heat away from the cylinders. The
cylinders themselves have choke (they're slightly smaller bore at the top), with the
thought being they'll expand to be straight when they heat up during normal operation.
Those two things are the primary reasons.... lack of oil and scuffing of cylinders.

-Cory

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* The prime directive of Linux: *
* - learn what you don't know, *
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* (Just my 20 USm$) *
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