When did pattern planes go from .60 two strokes or 1.20 four strokes to unlimited engine and 2m x 2m x 5kg airframe? Was this precipitated by F3A rules?

When I took an R/C leave of absence in 1989, pattern looked a lot different. I'm amazed that the planes have become so large in such a short time. I remember when a pump .60 with an 11x11 prop and a low rpm pipe was cutting edged. A set-up like that now is straight from the history books.

I think SPA is cool. I just wish they would offer a more modern class that includes planes like the original Hyde Jekyll. I remember drooling over that plane as a teenager. I think a lot of people would be interested in a class up to 1990 or whenever the rules changed to favor the full blown F3A style.

IMHO