MultiWii

​I am using a nanowii board for QUAD+ with D2830-11 1000kv motors, turnigy plush 18 Amp ESC's and a zippy flightmax 3S1P 5000mah battery
the TX-RX is a turnigy 9x V2

I am able calibrate the throttle individually for all the ESC but when i arm them, 3 of them work fine but the 4th one keeps on doing 'beep'-'beep' with an interval of about 2 seconds

The rest 3 motors work according to the throttle but the third one(bottom one) keeps on making that noise no matter what i do

could anyone tell me what the problem is?

[youtube]http://www.youtube.com/watch?v=Qoc4k1FEY6c[/youtube]

I think that you need to go through a process of elimination as you need to ascertain if it's the board, ESC or motor that's at fault. Try swapping ESC's, motors and channels on the Flight Controller to ascertain which is at fault.

The other thing you can do is to get yourself one of these Throttle Hubs.

http://www.unmannedtechshop.co.uk/throt ... -escs.html

It will simplify the calibration process and each ESC will receive the same commands.

Good luck.