The largest scale plane I have seen (on tape) was a 110%... yup, the model was 10% larger than the full scale. I can't remember the planes name, but I think it is called a dragonfly? Full scale is an expermental single seat mid/low wing that uses two chainsaw type motors on pods mounted on either side of the fuse out front. The model was flown in France? at a giant scale fly in... Since the AMA is not in France, many of these models did not adhere to the AMA weight limits. Maybe someone else has seen the same tape I'm thinking about and can elaborate.