parajared said:
I imagine you could just toss a cheapie hobbyking esc + motor in the thing and be just fine. Of course, by cheap I mean $100 esc and $100 motor. I bet an e-bike motor + esc would work fine too.
Like I was saying, you would need something to the tune of a 70kv motor if you use a 72 volt system and something to the tune of 200kv if you use a 24 volt system. You will need one heck of a beefy esc and wires to push 200 amps if you go with the lower voltage system.
I have looked for many motors at hobbyking, but i'm not sure how it works exactly
Example:
http://www.hobbyking.com/hobbyking/store/__18129__Turnigy_Aerodrive_SK3_6374_192kv_Brushless_Outrunner_Motor.html
this motor has 192kv, 80amps, 2750watt
192 * 24v = 4608 rpm thats fits
but how much power (watt) and amps has the motor at 24v?
are the amps fix and 24v * 80amps = 1920watt or can i control the amps in the esc
other example:
http://www.hobbyking.com/hobbyking/store/__17987__Turnigy_RotoMax_50cc_Size_Brushless_Outrunner_Motor.html
this motor has 172kv, 120amps, 5300watt
172 * 24v = 4128 rpm its ok
24v * 120amps = 2880watt??? or how i calculate it??
the esc i choose by the amps??
first motor something like that http://www.hobbyking.com/hobbyking/store/__4691__TURNIGY_Sentilon100A_HV_5_12S_BESC_Ver4_.html or is that also ok http://www.hobbyking.com/hobbyking/store/__24565__HobbyKing_100A_ESC_4A_UBEC.html
can i control the speed with a servo tester (http://www.hobbyking.com/hobbyking/store/__31882__Turnigy_Servo_Tester_UK_Warehouse_.html?strSearch=servo%20tester) i have seen it in many videos at youtube
thanks you so much for your help