Quote:
Originally posted by Rtsbasic
Why so low RPM's? I thought the best point for brushless was to aim for about 40K RPM? Or is it the gearing limiting it?
I can fit 16 cells in with no problem, my concern is with 12 or 14 its going to feel underpowered. I'm used to flying my trucks around at 40-50mph, and would expect the buggy to do the same. Plus the guy who runs my LHS has a GS Storm that runs 70mph+ runs back to back (radar'd), I'd like to at least try to keep up with that in a straight line, although I know 60-70mph with brushless is going to be next to impossible.
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40,000RPMs is the most efficient for the motor. At least for racing, 30-35,000 RPMs is all you need. You could try it with a motor that will go to 40,000 loaded. I can tell you my own experience with this. I run (not right now, though) a Feigao 8L on 4s Lipo. This pushes the motor to about 40,000RPM loaded (if not faster). With this setup, the motor and Warrior 9918 both got hot. When I downgraded to 3s Lipo, the whole system ran so much cooler, and I didn't have to give the motor time to cool off. With 3s Lipo, the 8L was spinning at about 32,000RPM. For my next setup, I am thinking of using a Feigao 7XL on 4s Lipo. Loaded, the top RPM will be about 32,000, which is perfect. And because the motor is so powerful, I could gear it to give me good speed without it overheating.
If you want to push the motor to 40,000RPMs, then I won't stop you. I am just sharing information that not only myself, but others that have run 1/8 electric buggies have found.