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Old 11-11-2008, 12:11 AM
  #19  
whissel_blowa
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Default RE: FlyFly BAe Hawk 90mm EDF

Fair enough, just like the APL factory in Malaysia never assembled FP packs, and the cells never came from Enerland, then the factory was 50% owned by FP, then it was everyone else got the cells FP rejected...

Sorry if I sound cynical but the FP ESC looks EXACTLY like a HW60A Pentium, the board is the same shape, heatsink the same, label the same, silicon wire is the same, and according to HW engineers the switchmode BEC is not very efficient when running over 22v and they do not recommend using it when 6 cell packs are connected. I realise a switchmode supply is far more efficient and able to cope with loads easily compared to good old linear M7805 regulators, but there has to be a design parameter to the chip as well right? Maybe this is what the engineers are getting at...

Servo loads are hard to guess, best to log them and be sure, especially with digitals where their holding current can be 4 times as high as their normal operating current, and most of these large jets have quite a lot of load on the servos even in general flight.