Max Motor Loaded RPM?

[mxrb18]

Anyone know what a very top range motor RPM would be in a catamaran racing setup? I know OSE recommends about 35,000 but not sure if anyone runs higher than that or that is typically the highest you ever want to run. I know some Lehner motors are rated for up to 85,000 RPM (WTFFFFFF) but not sure if anyone actually runs them that high. The setup I was considering is between 37k-42.7K. Thanks!

[mxrb18]

Should also clearify, Would be running 12s 5000maH per motor (TP-5680 1070 or 800kV) with ZTW seal 300A each 1.9P 53mm 3-blade prop on 1/4" drive shaft

[Mike W]

What hull? The TP 5680 doesn't like 40K+ and it really sucks the current making big power. More of a lower RPM 72" cat motor than high RPM SAW 1.35-1.45M SAW cat motor. SAW cats will certainly run 40-50k but its hard on equipment. The SSS 5694 is more durable at those RPMs and provides plenty of power.

[Fluid]

Plus, that is probably not enough prop for the torque those large motors produce, unless you are running excessive rpm. A larger thrust cone will work better for most uses. A lot depends on the use - short SAW runs or oval racing.