ORIGINAL: can773
You need to be very cautious about comparing online postings of brand X motor is 65A and Brand Y motor is 85A. I see many postings that do not indicate the RPM that the readings were taken. This is the most important aspect of being able to cross compare power systems as it provides an indication of the output of the motor.
Obviously a motor turning 500 RPM more on the same prop would have higher amps, but without that information the reader interprets this as the higher amps being less efficient which may not be the case at all.
I can not agree more on this one! Everyone is just mentioning power or Amps and nobody is mentioning rpm and/or prop type which really can ONLY tell the whole story! Props of same size but from different brands can give up to 30% difference in readings , not to mention the Voltage batteries give under load, from 3,2 up to 3,8 V/cell.
I have a feeling everyone is running after a "better" (more expensive) motor while at the same time good batteries and prop can have a much higher influence on performance.