A week ago we went to test fly again. The plan was to do a series of flight to evaluate the endurance of the helicopter and also do some failsafe testing. It was quite cold and windy (-17C and 10-20km/h):

Getting ready to fly

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We had 3 successful flights, including a couple autopilot takeoff and landings. The heli was struggling with the winds aloft though and had trouble hitting the static waypoint locations. At the end of the 3rd flight we discovered that the ductile to brittle transition temperature of the polycarbonate landing gear is around -15C:

Oops…

Not too much damage though, mostly just the landing gear and rotor blades! It did get me a chance to take a look inside the hanger (which is a very convenient thing to have at your UAV field!):

Nice to be out of the cold wind!

It was an interesting day and kind of nice to know that we aren’t the only ones having flying mishaps…