View Full Version : what is optimum prop speed?
Chenige
07-19-2011, 07:27 AM
What prop speed do you aim for? I see it can be calculated by KV x battery volts.
With a:
3000kV x 7.2 V = 21,600 RPM
3000kV x 10.8 V=32,400 RPM
Which is the better choice for a small mono? If you go with the "too high" 3S battery can you just dial down the ESC so it does not go so high?
BHChieftain
07-19-2011, 09:55 AM
What prop speed do you aim for? I see it can be calculated by KV x battery volts.
With a:
3000kV x 7.2 V = 21,600 RPM
3000kV x 10.8 V=32,400 RPM
Which is the better choice for a small mono? If you go with the "too high" 3S battery can you just dial down the ESC so it does not go so high?
I like to aim for high 20K or low 30K myself. Note, if you are talking Lipo, then it is 3.7V per cell, so your 3S would be 11.1V. I forgot who originally posted this chart but has come in handy:
55822
Chief
Chenige
07-19-2011, 10:34 AM
whoops. 33,300
And thanks, per the chart 3S is the way to go.
Boaterguy
07-20-2011, 12:39 AM
yeah, 3S would be the way to go. if you were talking nickel cells, you could use 7S for 8.4V, and get a little more rpm, or try both. some people do run outside that chart, usually slower but I'm running a 1970kv motor on 5S, oops! hehe
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