I just got the Fire Wheel F550 Hexacopter and need to pick out some APC or Graupner props for it. I am not familiar with props specs so what do I look for, i.e., slow fly/pitch or other? Which I could find Graupner or Xoar props locally.
And should I choose 8 or 9 inch diameter or both?
I live at 3300 feet MSL/ASL so does the air at altitude affect prop sizing?
Finally there seems to be a mismatch between the prop hole size and the motor rotor shaft size... Do I need to drill a larger hole? If so there is a risk of drilling off center etc.