Minimum Voltage

[flyfloatr]

On brushless motors, what does the minimum voltage spec really mean? If a motor says it has a minimum of 14 and maximum 18 should you really not run it on lower voltage? It seems to me that lower voltage on the same boat (no changes other than voltage, I know that's the key) would just make the motor run cooler. Less volts = less rpm = less load on the motor = cool happy motor.....right??

[Dr. Jet]

Less volts = less rpm = less load on the motor = cool happy motor.....right??

Also = less efficiency = more heat per watt in (although probably not enough to be a concern or do damage).

[ED66677]

it is also not good to run a brushless at no or few load, it overheats!
I would recommand to run at the higher voltage if it fits your application (output rpm) simply because higher voltage means less amp at same power, and less amp is less heat and longer run time, that is why it is very important to use the right motor for a given application, in the case of FE boat, given the cell count, choose a motor KV so that prop rpm will be around 25-30000 rpm, in FE boat it is simply impossible to run "fast" if the prop spins at "low" rpm!

[flyfloatr]

The motor I am looking at is 2900 KV so I think the 9.6 volt packs I have should put it right in it's sweet spot with a x432 prop. Thanks for the info!

[ED66677]

right on the spot!