Hi,
I got a hexacopter running on MT 4008-12 spinning 15x4 props on 4S lipos. At full throttle I should have 2:1 thrust to weight and at 70% I should have 1:1 thrust to weight.
Yet I can't even get it to take off at 5.6kg. Other than setting max throttle and assuming correct ESC setup of the throttle range, is there anything else to be aware off?
Thansk
Replies
According to your config and http://www.ecalc.ch/xcoptercalc.htm?ecalc&lang=fr : you should hover at 58% throttle:
Motor @ Hover
what esc firmware are you using? I had big problems with my MT3605 650kV with the stock 3dr esc firmware. I tried simonk with better results and ended up with multiwii-esc firmware and custom timings.
With wrong timings, it needed nearly 80% throttle to lift off, with the correct settings my quad hovers just about mid stick.
Regards
Marc
Have you done the calculations based on 6S? Ecalc is your friend.
(You will need to redesign power delivery for the APM if you go this route - the power module is only rated for 4S)
Well, my issue is that based on the number I should have a well flying copter, I am worried I am not getting all the current through to the motors for some reason.
Based on the motor manufacturer at 4S and 15x4 props I should have 1600 gr thrust per motor.