I use polypropylene hinges for my rotor hinges. This has been satistactory but today an odd thing happened. I went to our flying grounds but did not fly - neither did anyone else. The wind was too strong. The plane stayed in the car where I guess it was rather warm. When I got home the blades had sagged to the extent they would have hit the fin!. Anyone else had this happen? The hinges had apparently stretched.
Colin Duthie