I wonder if the Cummings valve really fits exactly. I would not be a bit
surprised
 if it did and it would be a windfall for all those people using Lycomings

in

experimental
 aircraft.

 Paul Lamar

No, cummins valves are MUCH bigger! (Think Big truck engines, etc.)

Bill Schertz
KIS Cruiser #4045

Well a 5 inch bore 360 cubic inch four cylinder AC engine is no small
exhaust valve. I think Cummins makes a V8 around 500 or 600 cubic inches.
So that would be about 75 to 100 cubic inches per cylinder. In the same
ball park with air cooled aircraft engines IMHO. 

What diesel displacement did you have in mind Bill?
I'll measure an O-470 exhaust valve in a day or two. I have plenty
lying around the hangar as paper weights.

Paul Lamar
 
The AirCraft Rotary Engine NewsLetter.              Powered by Linux.
ACRE NL web site.
http://home.earthlink.net/~rotaryeng/            http://www.linux.org