Flew jumpers in DC3 and 47s and I know about rudder lock. When on the jump run you would get heading corrections and you'd have to keep the plane level while changeing heading. Using to much rudder to keep it level would lock the rudder every time. No big deal once you knew it would happen. Sure scare the crap out of someone in the cockpit though.
And yes Warbirdz I did get a little time in a Super 3 and its not like the "real" thing but those days are long gone.
My favorite Gooneys had the two stage blowers. What a kick it was to get to about 10000 feet and switch to high blower and have all that throttle left. Don't remember if those were the Wrights or the PW-94s. Been a while.