Hi Dave,
Whilst I agree with you in theory, in actual practice it was moderately difficult to go 'very slowly'. She is fitted with a 4 blade 60mm prop and a cr**p Chinese speed controller, so when underway she was pulling from the off. I managed to create a 'bow wave' the like of which has not been seen on our lake, ever . When I've put up the film you will see what I mean.
I recon if I had a rope to the shore and connected it to the car, I could have moved it.
Another feature which became noticeable was then when throttling down from speed, the boat tended to pull severely to the right. I figured this might be due to the 4 blades stopped in the water and causing a turn effect with the curvature of the blades ??
The obvious solution is to gear down the motor. The thrust would be still be considerable but slower. The stability is very tender and she can rock from side to side. The captain could go water skiing.
ken