kv

[nickm669]

somewhat new to boats. Cars and trucks seem to run higher kv motors. If kv is rpm/volts, what is the advantage to running lower kv motors with more cells, as opposed to a high kv motor on less cells. Wouldn't there be a weight advantage with the smaller batteries?

[Ub Hauled]

lower Kv have higher torque and will require less amps to run,
higher Kv have lower torque and will require more amps to run.
These are only one of the differences

[domwilson]

lower Kv have higher torque and will require less amps to run,
higher Kv have lower torque and will require more amps to run.
These are only one of the differences

Ub Hauled is correct. Also it depends on hull size, type, design, weight, desired objectives, etc. Here is a good link to some info.. http://forums.offshoreelectrics.com/...read.php?t=271

It is a good starting point.

[Raydee]

With todays power we are actually adding weight to some of the hulls to keep them on the water at high speed. THe old days of keeping a boat really light are gone unless you are really underpowered I suppose. Higher volts and less KV are preferred but once you get up to 6s you have to start buying HV controllers and the price goes way up.

[nickm669]

thanks for the info. That's probably part of why my boats run hot.