There are many problems with the development of
effecient electric propulsion system for non military
applications may of which can be blamed on a lack of available
funds for this purpose. unfortunatly until private
industry can see the market the development of such will
be limited to a few visionaries who are willing to
spend the time and their own money to do this. We can
however benifit from other sources of of development.
private industry has had a need for years for corrosion
resistant motors. These are avaible off the shelf, as a
matter of fact I know of one company who is producing
all stainless motors as cheaply as other so callled
sever duty motors. Servo motors have been in sever duty
for over 20 years and some are avaible with effencies
in excess of 90%.