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lipomax · 02.04.2005, 07:06 PM

Actually, I've done test on a c406s (7000) with 2 cells vs. a c4012s (3500) with 4cells. The 12s is much more efficient than the 6s. Theoretically, RPM should be the same, but because there is less voltage sag, the RPM is higher with the slower motor and higher voltage. In addition, everything did run MUCH cooler and did not thermal the controller.

I don't believe you'll gain much going slower than 3000 rpm/volt. It seems that the small RC motors seem to peter out around 90% efficiency. So going 6s on 2100 isn't going to be much of an improvement vs. 4s on the 3100. But definitely an improvement over 3s on the 4200.

Going with a smaller lighter rotor doesn't make the car more driveable - it makes it more BALLISTIC! Acceleration is instataneous.. snappy... no spool up. When comparing the B506s (like a Feigao 6s), it was actually slower and pretty lazy on the track in my XXX-S G+. Going to the basic motor, it was definitely faster and still kinda smooth. Going to the c40, it was even quicker - so quick! I wish I had a vid. of my tc4 with 4s with the c4012s motor. Geared only 10:1, top speed is around 40 mph but it'll get there sooooo fast. If traction wasn't such an issue, I'm pretty sure I can do 0-40 in 1 second. I think I read the last RCCA and the TC4 did 0-40 in like 2 seonds with the 12 turn motor (if I remember correctly).

	(#34)
lipomax RC-Monster Carbon Fiber Offline Posts: 191 Join Date: Feb 2005	02.04.2005, 07:06 PM Actually, I've done test on a c406s (7000) with 2 cells vs. a c4012s (3500) with 4cells. The 12s is much more efficient than the 6s. Theoretically, RPM should be the same, but because there is less voltage sag, the RPM is higher with the slower motor and higher voltage. In addition, everything did run MUCH cooler and did not thermal the controller. I don't believe you'll gain much going slower than 3000 rpm/volt. It seems that the small RC motors seem to peter out around 90% efficiency. So going 6s on 2100 isn't going to be much of an improvement vs. 4s on the 3100. But definitely an improvement over 3s on the 4200. Going with a smaller lighter rotor doesn't make the car more driveable - it makes it more BALLISTIC! Acceleration is instataneous.. snappy... no spool up. When comparing the B506s (like a Feigao 6s), it was actually slower and pretty lazy on the track in my XXX-S G+. Going to the basic motor, it was definitely faster and still kinda smooth. Going to the c40, it was even quicker - so quick! I wish I had a vid. of my tc4 with 4s with the c4012s motor. Geared only 10:1, top speed is around 40 mph but it'll get there sooooo fast. If traction wasn't such an issue, I'm pretty sure I can do 0-40 in 1 second. I think I read the last RCCA and the TC4 did 0-40 in like 2 seonds with the 12 turn motor (if I remember correctly).