horse power

[seedoobob3]

Looking for the chart between, rpm, watts, kv etc = horse power thanks

[Make-a-Wake]

745.699 watts = 1 HP

[seedoobob3]

horsepower

Thanks make a wake, everything is listed rpm/kv per volt etc so thats what I'm trying to convert, like how they list motors on ose, figure hp and rpms is what I'm trying to do.

[Brushless55]

Thanks make a wake, everything is listed rpm/kv per volt etc so thats what I'm trying to convert, like how they list motors on ose, figure hp and rpms is what I'm trying to do.

well if a motor says 2500watts that's 3.35hp
and rpms is Volts x kv
22.2v (6s) x 1300kv = 28860rpms
but keep in mind, the motor will only pull the amps need to run
so that 3.35hp motor may only pull 50amps on 6s = 1110 watts or 1.49hp

[seedoobob3]

hp

I get the rpm-kv-parts but nobody list the watts part the watts part is what I'm trying to figure out what-what-what = watts,,,,, but thanks for the other info, I'll keep that noted

[siberianhusky]

volts x amps = watts

[Make-a-Wake]

Yep.................so a motor pulling 100 amps on 6s = 3hp............

[Fluid]

I get the rpm-kv-parts but nobody list the watts part the watts part is what I'm trying to figure out what-what-what = watts,,,,, but thanks for the other info, I'll keep that noted

The watts produced depends on the load. The same motor on the same voltage can product large differences of horsepower depending on the load (prop, etc.). So there is no way to accurately predict the watts produced.

The "best" way is to use the maximum rating of the ESC in amps, then multiply by the voltage. Don't use 3.7 volts per cell as LiPos will put out lower voltages under high loads. Use 3.4 to 3.6 volts. and do not multiply amps time volts - that will not give an accurate value. You need to know the efficiency of the motor you are using. Most BL motors are between 80% and 92%.

So: you have an ESC rated at 200 amps and 4S LiPos. You assume that the packs will deliver 13.6 volts under load. Your motor has an efficiency of 88%.

200 amps x 13.6 volts x 0.88% efficiency = 2393 watts/746 = 3.2 horsepower NOT 4 hp!

But not all motors will last at 200 amps draw. It is just not as simple as it is with an IC engine, and because the power delivery is much different you cannot directly compare a 3 hp IC engine with a 3hp BL motor..




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[seedoobob3]

hp

Thanks guys thats what I was looking for, hace aq good day boating this spring