High KV or Low KV - RC Groups
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Apr 26, 2004, 02:42 AM
Registered User

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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Apr 26, 2004, 07:56 AM
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Andy W's Avatar
High kV, 4.4:1..
Apr 26, 2004, 10:51 AM
Tight is Right
Darren Hintze's Avatar
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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