RC-Monster Forums - View Single Post

What's_nitro? · 12.23.2008, 11:47 PM

Well 13/68 gives you a 5.231:1 ratio. If there are no further reductions, then that is your final drive ratio. The 1515/1Y is 2200kV. If you run the maximum recommended 6s LiPo on that motor you'd be looking at ~49000 rpm unloaded, at the nominal voltage. That means your tracks would be moving around at more than 9000 rpm. That is pretty fast. Even with a lot of "rounding down", and assuming the drive cog is 2" in diameter, that puts you over 50 mph.

	(#2)
What's_nitro? Soldermaster Extraordinaire Offline Posts: 4,529 Join Date: Apr 2007 Location: Plymouth, MA, USA	12.23.2008, 11:47 PM Well 13/68 gives you a 5.231:1 ratio. If there are no further reductions, then that is your final drive ratio. The 1515/1Y is 2200kV. If you run the maximum recommended 6s LiPo on that motor you'd be looking at ~49000 rpm unloaded, at the nominal voltage. That means your tracks would be moving around at more than 9000 rpm. That is pretty fast. Even with a lot of "rounding down", and assuming the drive cog is 2" in diameter, that puts you over 50 mph.