[samste]

Kev That motor definitely has some grunt.
Do you know the Cont Running current of the motor which will help ?
For Myself, not sure how everyone else does it, i work on the Cont Current of Motor EG 40 amp as my basis
and then allow 30 % - 50% on top for short power bursts at Max amps EG 50 % = 60 amps.
I have notice that bench testing Motors with props on there seems to be more resistance on motor as it is being held back from moving, Where as in flight there would less resistance as plane is following behind not holding it back with only plane weight.
Plane weight and resistance would be at max on Vertical.
So with that thinking i assume the Actual max current would be less 10-20 % Eg 48 amps
Motors normally can take 20 % more than their rated cont current Eg 40 amps = 20% 48 amps
I am yet to prove my theory, buy installing a watt meter in my plane and record max amps during flight and then compare with my bench test max amps to see if I'm right or wrong.

Prop consideration is important, a decent size prop to size of plane as need to push air passed the huge front cowling of Trojan

Thats my 2 cents worth (rounded up to 5 cents these days)

Steve