Weight limit could make it tough for lots of batteries and large motors, but mid sized and lipo's look good.
Regards
Stephen
Wellll, you have to draw the line somewhere, and The FAI draws that line at 2.5 cc (or .15 in The King's English), in F1C, F2A, F2C, and F2D. That's pretty small by US standards, but still plenty of cubics to make a high performance plane if you put your mind to it. They fit into smaller cars and smaller airline boxes.
Same-same electric speed. Sure, a bigger, heavier, most expensive plane would go faster, but it's the same weight limit for everybody. This way, you get to burn down a smaller battery pack.