RE: Himax 2015 4100 or 5400?
I'm flying the E-flite Ultimate with the E-flite 370 5400 - 6.6 stock box - CC 25amp speed - GWS 9x4.7 and 3s 1320's .
After about 10 min of flite time the motor is cold and the battery is just starting to get warm .
I have about 30 flites on this set up and have not had any problems . The smaller prop is nice cause i don't have to fight the short wing every time i add power . It will hover at less than 1/2 and go streight up like a rocket when i hit the go stick !
I think it hovers and rolls better than it did with the 4100 !
Smaller props are cheeper to buy !