Originally Posted by SnowDog1974
So this would probably be a nice motor for a Vyper or a SuperVyper (48") ??
Yep. Some have used them in the EF 48" planes, or the 46" yak. Seems to be good power there.
For a 51" Slick the 2825 is closer, but the 3615 is better. The 2825 flexes a bit much for a 15" prop, I think Ken recommends a 13" prop on that motor. Or used to back a year or so ago. The 3615 rocks on a 51 though.