Originally Posted by Dr Kiwi
I am concerned about the data sheet posted in Post#22.. that 10x8 EP is seriously over-loading the motor, such that efficiency is down to 54%! That is why I questioned the duration of the test.. to see when the 50C temperature was reached. 240W through a 54.5g motor is asking for trouble and on the higher voltages those GWS RS props are exceeding their safe RPM limits (probably no more than 40-50,000 rpm/diameter.. yet these tests are running 'em at 60-70,000rpm/diameter).
I also question the thrust figures.. DriveCalc, Badcock, MotoCalc, FlyBrushless etc have decent "Thrust from RPM" data.. the figures posted in this table are as much as 20-30% higher than can be expected from prop x at RPM y.
These are reference, we are no load test.