Re: Waterjet Propulsion? [Not just AIP anymore <g>]

[Jon@huv.com (Jon Hylands)]

On Mon, 6 Apr 1998 17:45:05 EDT, SFreihof <SFreihof@aol.com> wrote:

> Something comes to mind regarding delivering power through a partition (hull?)
> without a shaft. In principle, a magnet is rotated inside which drives a
> magnet outside by the interaction of the respective magnetic fields, 

Some ROVs use magnetic couplings. Interestingly, most aquarium pumps also
use this type of coupling.

> Also, isn't it possible to run an oil-filled motor externally?  Being oil
> (non-compressable liquid) filled avoids the increasing pressure differentials
> of depth, and thus simplifies sealing.  There is a loss of power due to the
> armature rotating in a liquid, but I think this has been done successfully.

I'm pretty sure all deep diving subs (> 10K feet) use this technology for
motors. It's the only one that works at that depth...

Later,
Jon

--------------------------------------------------------------
   Jon Hylands      Jon@huv.com      http://www.huv.com/jon

  Project: Micro Seeker (Micro Autonomous Underwater Vehicle)
           http://www.huv.com