On Thu, 20 Dec 2007 21:43:18 +0200, "gpaleo"
wrote:
Ο "Matt W. Barrow" έγραψε στο μήνυμα
...
"gpaleo" wrote in message
news:1198177392.30618@athprx03...
"Matt W. Barrow" wrote
news
"gpaleo" wrote in message
news:1198154485.901022@athprx03...
"Matt Whiting" wrote
news
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Perhaps with your extensive and pontifical experience you cold summarize
the findings of Shell, Chevron, and TCM of the percentage of wear that
occurs in the first 30 seconds of cold (ie, below 40 degrees) starts?
May I humbly pontificate that proper starting of engines (incorporating
the, appropriate for the temps and engine, oil) at 25F will NOT impact
their respective TBOs to any statistically significant degree.
Well, your holiness, no one said anything about TBO.
I see what you mean. I intended to convey the idea that no damage would
occur to the engine resulting from the cold-ish starts within the time
period to overhaul.
Do find some inner peace, my son ;-)) (the holy-ness kicking in).
I'm stuffed if I can see how the cold start will have ruined his
engine.
the traditional reason for warming an engine prior to flight is so
that the exhaust muffle is hot enough to deliver carby heat if needed
on climb out.
now if the engine is fuel injected....
all engines get some wear in the first 30 seconds until all the oil is
around the sliding surfaces but for heavens sake the engine us not
running under any load so the wear will be minimal!
humble little I only run an O-200 in a Wittman Tailwind. I can be
airborne in under a minute from a cold start my hangar is so close to
the runway end. if I do take off with a cold engine and I dont
encounter icing my worst worry is a little blowby spraying some oil
mist under the belly which resolves in very short time as the parts
come to working temperatures. I just stick some new oil in :-)
one of the hardest things for an owner is to develop enough experience
with hands on operation to know the *actual* relative importances of
the concepts of engine operation. from my experience gpaleo is bang on
the money ....and I'm an atheist :-).
when it is all said and done...
there is more said than done.
Stealth Pilot
Australia