bigchap

i have built many i.c. planes but this is the first electric,it will have two 480 motors driving 4.7 x 4.7 graupner cam props,a 9.6 v 1250 mah battery,my question is what amp esc will i need?i just don't have a clue with electric,HELP!also do i wire the motors to the esc in parallel or in series?

INeedHelp

My Feedback: (1)

Personally, I like the Pixie 20 but I am not sure how many amps you will be drawing. The motors can be wire in parallel to the same speed control with brushed motors.

-pkh-

My Feedback: (2)

Well, a Great Planes C-50 definitely will have you covered... 50A max. You'll have to find out what your 480s will draw with that setup otherwise... can't help you there...

I'd guess you'd need at least a 20A ESC, 30A may do it, and the 50A should definitely do it. The Great Planes C-50 is only about $12 more than the C-30...

Matt Kirsch

My Feedback: (21)

480s can be set up to draw up to 15 Amps each. They won't in this case, and in fact, you'll have plenty of leftover capability in the motors, but I'd still go with at least a 30A speed control. As pkh says, the cost difference isn't that great, and you can't go too big.

If you want more power and less weight with a 9.6V battery and 4.7x4.7 props, go with 6V Speed 400s. Seems counterintuitive that a SMALLER motor would be "more powerful" eh? Well, it's true. The smaller motors are wound to spin the props faster, and they can handle the power necessary to spin those props on that much voltage.

bigchap

i do have a 30a esc so i think i'll go with that,many thanks.