RE: ACE 4-60 Engine
Believe it or not, I wasn't saying that the four-strokes would under power the model. What I was saying was that the K&B .65 was capable of swinging the same sized large props with ease, unlike most two-strokes that really prefer to rev-up.
Ever notice that the 4*40 shows a Saito .50 on the plans? <G>
Ed Cregger