I had that happen with one of the old gliders I used to build. A friend and I built a set one weekend and then late one night took them out for fun. It was in England and after 1/2 hour or so the skins on the wings started to get floppy... even with a good layer of dope on them. Took back inside and hit them with a blow dryer and headed back out! Lost that one, when I was flying in some rolling hills. Caught an updraft and it just kept on going, watched it continue to climb till was out of sight!
Thanky guys. The Videos were made by John Lancaster (Robobiggles on youtube). We had great fun doing this stuff
In July some of the cast of the Battle of Britain model squadron is heading over to germany to my birthday fly in
Will keep you updated if you are interested in.
This is the obvious reason why papercrafting is a winter hobby for me