The gliding club where I learned to fly was based out of a sheep paddock in South Australia. The field was infested along the fence lines with paddy melons, a totally inedible wild melon about the size of a softball. Must've tasted bad, even the sheep left them alone.
We had an ES-59 Arrow, a wood and rag sailplane which could be flown without the canopy.
It became something of a tradition to toss paddy melons overboard at the top of a winch launch to see if you could bomb the safety cage of the winch. The cage was made out of steel mesh; a direct hit would cause the paddy melon to basically liquefy, showering the winch driver with bitter smelly fruit pulp.
By the time I joined the club, the winch safety cage had been replaced with a sealed enclosure made out of checkerplate and polycarbonate, causing the practice to fall out of favour: Hitting it would scare the heck out of the winch driver with a massive bang, but if they didn't get any in their hair then what's the point?
The old Arrow was great fun for toilet paper streamer cuts. VNE was 128 kts, but it was so draggy that it was almost impossible to get that fast without a vertical dive. Thermal up to 7000 or 8000 feet, toss out a roll, see how many times you could cut it by the time you were down to 2000, then find another thermal and start again.
In an RV I'd worry about overspeed, these planes are too slippery and have too much power to weight ratio.
- mark