If this has been covered before, I'm sorry

I'm new at flying electrics

I have a Shocky, Axi 2208/34 motor, Pheonix 10 controller use a 860ma battery, 10 X 4.7 prop.

When I advance throttle rapidly, the motor cuts out, return throttle to low the advance again the motor comes on.

Thanks

What brand of battery?

If it is an Electrifly, make sure you are plugging into the discharge lead and not the charge lead. The symptoms you describe are the exact symptoms you will see if you plugged it into the charge lead.

Thunder Power

Your motor is trying to pull more curent than the battery pack can supply - the voltage is dropping under load to below the level of the LVC - the LVC then works as designed and shuts the motor down - when the throttle is backed off, the voltage increases again, and you start over.

You are way overpropped for that motor - an extraordinarily irresponsible review article in Nov 2004 Fly RC discussed exactly your set-up - 15A at WOT!! The motor is only rated for 4-7A, max of 8A/60sec, yet the reviewer reported flying for 12 minutes at an average draw of 7.5A!! He was using Kokam 1500's (rated at 8C = 12A) so he was overtaxing those too!!

Those TP 860's you have are presumably Gen 1 (6C) - if so they CANNOT hope to supply that sort of current safely.

Cheers, Phil

Thanks Dr.

I'm really a newbie at this. As you stated, I am overproped. What is your suggestion as to what brand and size prop should I use.

You need a smaller prop or a larger battery. Same voltage and cell count, just more mAh. I could barely spin a 9/4.7 on a 3 cell 720 mAh and went to a 3 cell 1320 mAh and was able to spin a 11/4.7 Just my experience. Good luck, Joe

You don't want to stay with the large prop and simply get a larger battery, because all that will do is pull more juice than your motor can handle.

I'd suggest a 9x5 GWS HD prop:

On 3s TP 2100 (momentary peak measurement)

10.8A, 10.4v, 112W, 576g (20.28oz) thrust

Your 830 packs won't provide quite this power level, but for your motor's sake (8A max limit) I reckon that the 7-8A they will be able to give, would be ideal. A 9x4.7 APC SF could be good too, but a 9x6 APC SF is too much (~15A again).

Cheers, Phil

I tried the 9/4.7 prop today and that worked. The plane and motor are happy.

Thanks for your help.