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Old 06-05-2016, 05:52 PM   #33 (permalink)
freebeard
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I'm not sure. It's a mixed bag. Aircraft powerplants get torn down and rebuilt based on engine hours with no debate.

I believe there are watercooled V-6 aircraft rated engines. Do you have any example?

2500hp AA fuel engines have a fairly short life span. So do Bug engines rebuilt in the carport with Harbor Freight tools.

Possibly a level playing field is motorcycles; they come in air- water- varieties. Here's a water-cooled Vespa:


http://blog.vintagestyle.eu/ten-inch-terror-meet-the-vespa-husqvarna/
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