Is there a list of planes the RCGF 15cc will fit entirely in the cowl of and power it for at least a slow unlimited vertical ? I assume it is an attempt at replacing a 60 glow engine.
RCGF 15cc vs NGH9 comments wanted also.

The RCGF 20cc directions suggest that air exits to the cowl should be 3 times the size of the intake hole. What I am saying is that you need exit vents, whether or not the engine sticks outside the cowl.

If the engine is completely inside the cowling, it may overheat badly.

Slow unlimited vertical? would come down to power to weight ration.

That I already knew Thermalin. But thanks for the tip.

I'm looking for someone who has already done it. I may hop on down to the NGH9 but I have only seen it running wet and oily at the cylinder top .

Originally Posted by Thermalin

Slow unlimited vertical? would come down to power to weight ration.

Yup, it's best to use the weight up before the power.

What airplane can I use that this the motor fits in ? I see them with the motor sticking out and or no cowling. Maybe just stick with electrics then. I don't like such an investment in time and money looking like a rig.

Best bet is probably a .60 sized Sukhoi or Yak, those big radial cowls usually cover most of the engine. You will need a hole for a glow ignitor, needle valve and exhaust pipe at the very least. Most of the other aerobatic planes, Extra, Edge, Cap etc have a wide cowl and the head will usually be close to flush with the cowl if mounted sideways. Most smaller planes, those under 1.20ci/20ccish size will have some part of the engine projecting through the cowl, it's just something you have to expect.

Yea, a YAK would fit me well, my old nickname was Motormouth.