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highflier · 10.24.2008, 11:35 AM

3.7 X 7 = 26 volts
1600KV X 26 = 41000 RPM
2000KV X 26 = 52000 RPM

Now your packs will sag based on you amp draw. Plus your looking for long run time. All that said. The 2000 will be close to the limit and the 1600 will be more in the sweet spot.

I don't know anything about the gearing but I would say that the 1600 with the right gearing is a better option.

Highflier
PS. Keep in mind you might be on the very edge of your ESC voltage.

	(#352)
highflier Emaxx- FLM wannabe Offline Posts: 253 Join Date: Oct 2005 Location: PA	10.24.2008, 11:35 AM 3.7 X 7 = 26 volts 1600KV X 26 = 41000 RPM 2000KV X 26 = 52000 RPM Now your packs will sag based on you amp draw. Plus your looking for long run time. All that said. The 2000 will be close to the limit and the 1600 will be more in the sweet spot. I don't know anything about the gearing but I would say that the 1600 with the right gearing is a better option. Highflier PS. Keep in mind you might be on the very edge of your ESC voltage. E-maxx Brushless HPI MT Racer Brushless Associated rc10t brushless Associated B3 Brushed Tons of airplanes and a few Heli's