Does anyone have any first hand expierence with
using a Kort nozzle on electric boats. My research seem
to indicate that they may help especialy when
dealing with the low speed that electric boats tend to
run. One manufacturer of an electric outboard claims a
50% increase effecency in prop performance with speed
up to 10 to 12 knots. I know that they will increase
the thrust especialy at lower speeds and are used on
tug boats. How much increase in speed can we expect??
It might be an area where we can all benifit if it
will "lighten the load" on the motor. If the data that
I have seen about tug boats (which is where they
appear to be most widly used) can be can be carried over
to the electric propulsion of small boats it should
result in a BIG increase in effency especialy at low
propeler speed. If you can take a prop which is 40%
effecient at say 4 knots and even increase its effency by
30% it should result in a decrease in motor loads
which would greatly extend range.
