Quote:
Originally posted by chelboed
I'm gonna have to disagree witcha there xatu. I use high torque 2.8-3.0'ish motors in my 3cell cars with high gears. I usually use the highest gears possible. This way, I can still somewhat pull wheelies, but I don't get too much wheelspin off the line. That's what I used in my 1.9 second scale 1/4 mile car.
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Mumble Mumble ...
Made some test with the crappy 3x1.2V 40mAh cells !
As result the best motor was the 2.2 (I tested the 1.6,2.2,2.6,3.0).
The reason for this result was quite clear to me.
If you take a multimeter and you mesure the Volt around the 3cells while full power, you can see that this Volt drop a lot.
The reason of Volt drop it is becouse these crappy cells can effort to provide more then 150mA.
As consequence a more efficient motor with higer impendence will provide a better performance.
Very fast motor need lot of Amp and has lower Impedence ...
BTW At best I was able to run up to 45sec with these 3 cells ... to few and to booring to charge with an external device !
Using a 1.2V 200mA with a 3.8 motor I just lose 20% in performance but my car run over 10minutes and no problem using a standard charger !
e_lm_70
P.S: With some soldering skills is possible to fit up to 6 of these micro cells (1.2Vx40mAh) 5 below the PCB and one over. In this case having 3.6Vx80mAh the performance in speed and duration could be acceptable .... but I'm till not bored enough for spend time on try this out !