View Full Version : Electric twin modification

10-30-2006, 01:01 PM
Hello, Im trying to set up the twin star as electric with my power plant Im going to use on my Dash 8 project. When I put in the axi 2820-12 motors, 3s2p 4100 lipos, and 10in prop config its way under powered and doesent pull many amps or have much thrust. it will barely get in the air. I then electrified the nextstar with this motor, lipo and prop set up and it works very well.( 1 motor, battery ,ect..) The only way I can get the twin star to fly is with a 3s 4 or 6p and 12 or 13inch props. The amps are still only in the 20s. If i remove the enginge from the wigs and put one on the front of the fuse it works just like the Nextstar. It will get 30+ amps, 9500rpm, and 5 to 6 lbs of thrust, depending on the prop. When the second motor is added the power is cut in half. I followed twin conversions with my power setup and they fly better than I can get the twin star to move. Any tips or ideas greatly appreciated, Thanks

10-30-2006, 03:02 PM
That is right...

A 3s2p setup with only one battery would be split by the two motors resulting an a low voltage condition e.g. 11x2.

So double the battery.

G3 doesn't provide for seperate ESCs, so you would have to work as if there is one battery that is supplying voltage to two motors.

10-30-2006, 03:39 PM
Ive doubled the voltage by using a 6s4p( 25v and 8000mah) and this doesnt seem right. the amps are at 37,ok, but the thrust is now at 7.5lbs and the rpm are 11000 static. in the air its in the 16 to 17000 range and it flies at 90mph. Its alot like having the nitros on it. I dont know alot about electrics but a but I thought the kv rating is the rpm per volt. Ie 920x12v=11040. But if that was true 25x920=23000. I assume that is a no load or no prop condition.Is this all I can Do? Thanks for the response

10-30-2006, 04:51 PM
Adjust the battery count to give you a lower voltage and get the motors in line.

10-30-2006, 05:55 PM
What do you mean by adjusting the battery count? Like the 3s4p? Which gives me 11.1v and 8000mah? this is what ive been trying but isnt working quite right.

10-30-2006, 06:00 PM
Try 4S4P.

10-30-2006, 06:07 PM
with the 4s4p I got this. 9500rpm static, 12500 in the air and 65mph. I guess this is the closest ill get. It fleis well. Thanks for all the help, Buy the way, thanks for all the other work amnd aircraft youve worked on.

10-30-2006, 08:04 PM

Remember that if it's still too powerful, you can edit the motor and adjust it's resistance up to decrease the power output.

You could also lower the torque percentage from the motor as well to achieve the same result.