Re: [PSUBS-MAILIST] motor seals

["Gary R. Boucher" <protek@shreve.net>]

     The magnets will not be "slowed" by rotation unless there is some 
conductor in the proximity to allow the fields to generate current.  The 
motor will not have to "work harder" to do anything.  The only headache is 
trying to create the drive shaft going to the propeller.  If done properly 
there will be very little energy loss with the majority of that loss going 
into the bearings and any portion of the coupling that has to rotate in or 
through the water itself.

GB


>The loss through heat may be a problem, but something else to consider is
>that not very small electromagnetic fields get generated too, slowing the
>magnets down and making your motor work harder to get up to the speed you
>want generating more fields and causing more headaches than it's worth.
>
>Anthony