The radial models are nice with the RCV, the cooling issue would not be as much of a problem. I think the real challenge comes with the liquid cooled inline type of models.

Juat as a matter of info:

According to my emailed temperature question to RCV, they answered, the normal operating temp for the RCVsp engines are between 315 degrees F to 350 degrees F at the egxhast port nut location.

Steve