RE: How hot is too hot to fly?
I had this same question so I asked the service tech at Hacker what the temperature would have to climb to to damage my C50 Comp 13XL. He said they were ok up to 170 deg. This seems awful high, but I am flying in 104 degree weather here in So. Cal., but the motor only reached 135 deg. flying the Masters Sequence. So I think someone would really have to push these motors hard or be having other issues to get them up that high.
Bill...