Yogi-Bear:

The OS 52 4s will fly the plane nicely, but it will not give you unlimited vertical. An OS 46 FX, with an APC 12.25x3.75 prop will hover the plane, if you don't build it too heavy.

And just incidentally, the fellow that Yogi Bear was named after is 78 years old today, May 12th.

His name? Yogi Berra, what else? A member of the New York Yankees baseball team.

Bill.