On-Condition wrote:

Most gas radials I've seen/flown had around 8:1 compression,
that's food for thought. Just wondering though, are the german
aircooled diesel cylinders intergral with the block?

the WWII era Guiberson and Cat D-200A Radials had 14.3:1 and
15.5:1 respectively. The Guiberson weighed about 1100 pounds
in Tank trim, And that Cat engine started out as an Wright R-1820,
but weighed over 3000 pounds by time Cat beefed it up enough
to be reliable.

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mike
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