Hey guys,

I have one of the aformentioned engines and I think from what I read that it's a combat engine.

It has a flat top piston and two BB races. I want to use it on a stunt plane because it's so darn pretty, just doubt if it would be worth it.

It's missing the venturi so of anyome has one I am all ears.

Ron

I threw one in my .46 thing to see whatd happen , along with OS 40 & others .
The engine was ex RC & not the best piston liner fit . Used .46 venturie .

Was the weakest uphill , on a 10 x 6 prop .
Thinking about it a 9 x 6 or a 10 x 4 or 5 ( narrow wood ) would be more sensable .
the 21/35 is the same porting , on a three blade 10 x 4 it hauled the Phantom round authoritively .
Steady Speed , Unmuffled . Wanna check under the piston at TDC , if its ' open under ' ( sub piston induction )
its not gunna be that good with a muffler .

Years ago I put a ETA 29 in a Early Bird combat wing with a 9 x 6 on 60 ft lines , it cruised at about 90 mph on a rich setting .
Probably a more enjoyable persuit with it. Though if it falls in a light F2B thing , give it a go .Probably wants to run at around
14000 if you want any powerthough , so wont want a big prop .