RC-Monster Forums - View Single Post - How to compare gasengine size to outrunner ?

BrianG · 12.08.2008, 11:28 AM

I agree. Better to do it right the first time than to do it twice.

A smaller motor can push it, but as others say, it will get too hot too fast. For something that large, you need torque - and that requires a large motor. I too would look at the 1527 at a minimum, but the 2215 probably would be more optimum.

Once you get your motor choice squared away, use high voltage to keep current levels manageable. Even on 10s, I would expect large current spikes on startup simply because of the size/weight. For something like this, I would like a 200A ESC @ 10s (or 12s), otherwise the ESC will be working hard IMO. I don't think the Sentilon will like this setup unless you can have someone parallel 2 or 3 of the FET boards, but then you are at ~$300. At that point, might as well get an MGM or something. Contact Castle - they might have a recommendation for you (they have a large HV/200A ESC in their special projects page). They may be able to custom build you a super-HV110 by adding one or two more FET PCBs, but that will cost more.

No matter what, pushing a 25lb vehicle to 40mph speeds is not gonna be cheap.

	(#9)
BrianG RC-Monster Admin Offline Posts: 14,609 Join Date: Nov 2005 Location: Des Moines, IA	12.08.2008, 11:28 AM I agree. Better to do it right the first time than to do it twice. A smaller motor can push it, but as others say, it will get too hot too fast. For something that large, you need torque - and that requires a large motor. I too would look at the 1527 at a minimum, but the 2215 probably would be more optimum. Once you get your motor choice squared away, use high voltage to keep current levels manageable. Even on 10s, I would expect large current spikes on startup simply because of the size/weight. For something like this, I would like a 200A ESC @ 10s (or 12s), otherwise the ESC will be working hard IMO. I don't think the Sentilon will like this setup unless you can have someone parallel 2 or 3 of the FET boards, but then you are at ~$300. At that point, might as well get an MGM or something. Contact Castle - they might have a recommendation for you (they have a large HV/200A ESC in their special projects page). They may be able to custom build you a super-HV110 by adding one or two more FET PCBs, but that will cost more. No matter what, pushing a 25lb vehicle to 40mph speeds is not gonna be cheap.