In article ,
"Morgans" wrote:

"Orval Fairbairn" wrote

I have also seen a few successes, too. One was the late George Morse's
Olds V-6 in his Skybolt and later in the Prowler. He found that you need
an AN water pump instead of the automotive one and that you also need a
coolant pressure indicator, in addition to temperature.

What do you mean by an AN water pump?

IIRC, George meant to use a water pump such as used on Merlins or
Allisons. he found the automotive pumps to be lacking.



One of the common things people say about auto conversions, is that they are
not designed to run at the high power outputs that are needed for aircraft.

It seems, however, that most of the problems are in the stuff that is bolted
to the engine. PSRU's fail, water pumps go out, belts fly around, fuel
delivery is not up to the job, cooling is not good enough, whatever. The
engines are rarely the problem, though.

True! If you isolate the engine from unintended stresses, it will work a
lot better, but those same stresses manifest themselves in other places,
unless you are really sharp anticipating them.


Good design and doing what other successful converters have done, looks to
be the key.

True -- that is *ALWAYS* the case! Add in "good practices" also.