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Old Apr 26, 2004, 01:42 AM
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Joined Apr 2004
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High KV or Low KV

I intended to purchase a 2015 series Himaxx and gear it down, to be used for APC 7 x 5 at arround 13000 rpm, at 3 cell Li-ion. assuming 10V underload, which to achieve 8 amp max output current.

2015-2700, using 2:1 gear ratio down to 13500 rpm.

2015-5400, using 4.4:1 gear ratio around 12300 rpm.

Which set up is better in term of efficiency? (longer flight time/less current draw) or if the set up is no good.

Please give advice.
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Old Apr 26, 2004, 06:56 AM
RIP Ric
Andy W's Avatar
Marietta, GA
Joined Jun 1999
43,312 Posts
High kV, 4.4:1..
..a
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Old Apr 26, 2004, 09:51 AM
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Darren Hintze's Avatar
Lehi, Utah, United States
Joined Dec 2001
7,664 Posts
What Andy said. The higher Kv motor has lower internal resistance. Until you're up at a voltage where max RPM is an issue, it's usually better to go with the higher Kv motor geared deeper.
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