RE: *SIG Rascal 40*
I have a Rascal 40 that started life with a GP42. It was plenty of power even at our 5000 ft altitude. Not unlimited vertical, but plenty for this type of plane. This plane is the easiest plane to knife edge I have ever owned. Very effective rudder and large, flat fuse sides. My only complaint is that I wish the ailerons were more effective.
The Rascal is on floats for now. The GP42 had enough power to fly it with floats as well, but I changed it out for a Saito 72 four stroke to improve idle reliability. I just could not get a consistant idle out of the GP42 on the Rascal. You don't want a float plane with idle problems.
Greg