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BrianG · 03.12.2008, 03:25 PM

Both are around 11lbs RTR.

The 1509/1512/1515 are really all the same except for the can/rotor length. For a given turn count, greater motor length will give you lower kv (more torque) and cooler running (more surface area). The 1515 could probably go forever without ANY kind of heat issues at all and has the torque to be geared for VERY high speeds if desired. The 1509 is good for racing since its lighter and any weight savings can help. The 1512 is just a good compromise between the two IMO; is fairly light and can still be geared high if you want to go faster than 35-40.

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BrianG RC-Monster Admin Offline Posts: 14,609 Join Date: Nov 2005 Location: Des Moines, IA	03.12.2008, 03:25 PM Both are around 11lbs RTR. The 1509/1512/1515 are really all the same except for the can/rotor length. For a given turn count, greater motor length will give you lower kv (more torque) and cooler running (more surface area). The 1515 could probably go forever without ANY kind of heat issues at all and has the torque to be geared for VERY high speeds if desired. The 1509 is good for racing since its lighter and any weight savings can help. The 1512 is just a good compromise between the two IMO; is fairly light and can still be geared high if you want to go faster than 35-40.