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        High KV or Low KV

#1 RockyTse Apr 26, 2004 01:42 AM

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. :rolleyes:

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

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

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.

#2 Andy W Apr 26, 2004 06:56 AM

High kV, 4.4:1..

#3 Darren Hintze Apr 26, 2004 09:51 AM

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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