More thread drift but I cant help meself ...
It trounces the air cooled stuff in the training environment because the temps around the valve train are always stable in circuit training. I think you will find that the rotax engine is now doing more training hours than any other piston engine in Australia and its no surprise why. The only problem is it only makes 100 ponies.
I like the Rotax donk but I am not sure this is true. Let's see, I get my 180 horse Scout and I perform a normal landing with a powered approach. When I shut down at the hangar door the cylinder temp is 325.
Next I turn up over the top at 2500 and pull the power right back to idle. I fly a glide approach, don't touch the power and manage (fluke perhaps) to arrive at the hangar door without using the throttle at all. Cylinder temp 310.
Temps around the valve train stable, you tell me.