Kyler Laird wrote:
I see that the Fairey Rotodyne had a max. gross weight of over
32,000 pounds. The only gyro in which I have time was close to
2% of that weight. It's been years since I've been to a PRA
fly-in, but I only recall seeing *little* (two-person max.)
aircraft - much lighter than the 5200 pound fixed-wing I'm
accustomed to flying.

I'm curious if there are special design problems that emerge
when gyros exceed some weight, or is it just that people who
want gyros don't want large aircraft?

Market forces. Gyros have strictly limited functionality, being 'neither
fish nor fowl'. If no-one can find a real use for them, their market is
limited to the enthusiast market, which has shallow pockets and very
limited requirements (ie, one or two seats).