Onewasp and jetmech43 -

I'm aware that the FAI is the governing body for pattern and I know that all sports have rules. For the most part these rules serve to level the playing field. Motorsports have MINIMUM weight rules for this purpose (and to help control costs). But if I wanted to build a 6,000 lb NASCAR I would be allowed but I'm sure it would be too slow to qualify given the engine restrictions. I could also build a 20 lb 2X2m plane but it wouldn't fly worth beans. I can understand the size and noise restrictions - just don't know what a MAX weight rule accomplishes.

Jack