ORIGINAL: Jim Thomerson
There is control line speed-limit combat. Either 75 or 80 mph depending on where you are. I haven't checked to see if it is in the rulebook yet, but is flown at a fair number of AMA sanctioned contests.
Touche, Jim, you may well be right about that. There could be any number of speed related rules in specific competition events be they official, supplemental. or provisional, and certainly down in the local area, club, or even SIG rules. Those are up to the using agencies.
As far as official Safety Code items, which apply to all AMA Members (SC, General, #3) and AMA Charter Club operations, without specific waivers that may be allowed on unit or individual cases, only turbines are speed restricted.