Nope, CGBob says that about the can. I have different theories- I look to the tables at www.raboesch.com for typical max speeds for scale props (just a function of prop diameter), and try to achieve that limit (which will usually be too fast anyway for a scale displacement hull). That may require direct drive with an appropriate motor, or a reduction drive with a smaller motor (gear or belt reduction).

On my new tug, the motor is significantly smaller than the prop in direct drive, but the match is quite happy.


Pat M