Itai,
Here is a test graph to help you decide on the ESC.
My setup:
- PA Thrust 30
- Castle Creations 45
- FlightPower 2170mAH 3s1p Evolution 25C
APC E prop 12x6
Max Amp Draw: 32.1 Max Watts: 339
APC E prop 13x6.5
Max Amp Draw: 38.8 Max Watts: 416
Ralph P.