The Tiger2 ARFs that're available right now are pretty heavy for their class. I've put together about nine 46size ARFs this last year and my Tiger2 is the heaviest of the bunch. If flies great, but it's obviously not light. I wouldn't want to fly it with a 52FS on it, unless it was being used to teach somebody on a buddybox.

It's just under 6 pounds.

The rule of thumb for estimating the power of a Fourstroke is to figure 1.5 to 1.
Take the 2cycle engine and add half it's displace back. Half of a .46 is .23. Add 23 to 46 and you got 69.
Take the 4cycle engine and find 2/3's it's size. Take 52 and divide by 3. 1/3 of 52 is 17. Two times 17 is 34.

A couple of airplanes at the field have been flying with 52FSs. They fly like they would with a .35 two cycle. One was retrofitted with a 40 two cycle. It flies better than before. The owner is planning to put a 46AX on it as soon as he can.