mike wrote:
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.

Diesels are heavy, I know. Just got my tractor
up to about 35mph on the runway, but the damned
thing wouldn't stay in the air.


(2-stroke) aircooled diesel radials:

70 hp 121 lbs
150 hp 185 lbs
300 hp 271 lbs

http://www.zoche.de/specs.html