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Just another point that sorta' hit me in the head
(if you ever see my head, you'll understand that
happens a lot).
One of the aviation magazines I was reading (can't
remember which) had one of those "barely survived"
stories about winter flying. The guy said it was so
cold out that his engine was running rough and he
didn't have enough cabin heat. His solution was to
put it in a such an extreme climb configuration that
it wouldn't actually climb. Full power and still
slow, he could get the engine to heat up. He'd
lower the nose when he started getting warm again. Claimed he flew for hours like that.
This wasn't a watercooled engine, but the idea is
the same. There is such a thing as too much cooling.
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At 09:51 PM 4/19/2004 -0400, you wrote:
Water will often freeze in the radiator if you do not have anti-freeze,
even if the engine is warm. The freeze will start in a low flow (water)
region and will then spread as the flow is further blocked, perhaps
bursting radiator tubes as it progresses.
I certainly can't prove this isn't true, but someone would sure have to prove that it is, before I could believe it. I just don't see how rapidly moving, hot water is going to freeze.
"Rapidly moving" is the key phrase. The problem is that often the water does not move rapidly everywhere at all times. For example, some corner of the radiator (like the drain cock) may have a lot of air cooling, but very little water movement.
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