The net torque is zero, hence changes can occur quickly. The blade
configuration always has metal in the flow for maximum efficiency, no
chopping.

Anyone who knows anything about propellers knows sternwheelers are used to
cut seagrass.

Gilligan




"Nav" wrote in message
...
Is that to cut the sea grass?

Cheers

Gilligan wrote:

Counter rotating scythe propellers with electric drive.

Gilligan

"Bart Senior" wrote in message
...

2 points

After hitting the lottery for big bucks, you have nearly completed
your 150' new sailing mega yacht. Included on your new toy are both a
bow and stern thrusters--for side-to-side control..

What sort of prop would you want if you were concerned about precise
speed control, and being able to back down nearly instantaneously?

Money is, of course not a concern.