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BrianG · 10.13.2008, 11:23 PM

People say the 60mm will be fine, but I personally would go with the 70mm version when it comes out. The GTP is a fairly heavy vehicle (at least mine is) and geared tall enough to hit higher speeds with one gear will put a decent load on it.

Again, for something that will be going fast, I would probably mate a 2000 kv motor with 5s. For 4s, I would run a kv of ~2500. I like higher rpms when geared tall, because the ESC may have trouble getting rotor position on take-off, which may cause cogging. A faster motor geared right should take off smoothly and have decent top end. The Medusas are rated upwards of 60k rpm, so 40k+ should still be well into the efficiency range.

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BrianG RC-Monster Admin Offline Posts: 14,609 Join Date: Nov 2005 Location: Des Moines, IA	10.13.2008, 11:23 PM People say the 60mm will be fine, but I personally would go with the 70mm version when it comes out. The GTP is a fairly heavy vehicle (at least mine is) and geared tall enough to hit higher speeds with one gear will put a decent load on it. Again, for something that will be going fast, I would probably mate a 2000 kv motor with 5s. For 4s, I would run a kv of ~2500. I like higher rpms when geared tall, because the ESC may have trouble getting rotor position on take-off, which may cause cogging. A faster motor geared right should take off smoothly and have decent top end. The Medusas are rated upwards of 60k rpm, so 40k+ should still be well into the efficiency range.