[PSUBS-MAILIST] Hydraulic thrusters

[John Gaertner <jgaertner1@earthlink.net>]

Byron,

After looking into the magnetic cluth idea and finding it unlikely to work for my needs I have turned all my efforts to a hydraulic system much like the Cousteau's Diving Saucer "Soucoupe". I think a hydraulic system offers a great deal of advantages especially for my design. With the 24V 1HP electric motor inside the pressure hull turning a hydraulic pump, I will only need to run two smal steel hydraulic lines through the hull to the water thruster pump. I am now working on that system. Once I have a working model I will be able to post my findings for others in the group.

John Gaertner 


-----Original Message-----
From: Byron Selman <byron@flyingfishfoto.com>
Sent: Oct 24, 2005 5:57 AM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST]  RimTec Magnetic Clutches

Have you thought of talking to some of the thruster guys?  All of  the ROV's out there ( except el-cheapo cheapo toys) have some external thrusters.   They are almost always electric.  I worked for Deep  Sea Systems, Inc. as a consultant for about six months, and have been friends with Chris  Nicholson (owner/pres) for twenty years.    If you can catch Chris's imagination, he can be a world of help.  He builds and sells electric thrusters.

Innovatum is another group.

Slightly different subject, but I gotta ask:

Have you considered hydraulic thruster motors?  You keep the pump inside the sub and use through-hull fittings to run hydraulic motors outside.    Putting a piece of  pipe fitting through a sub wall for hydraulic hoses is lots easier than either electric feed-throughs or a shaftdrive with a stuffing gland.

Or bite the bullet, use the stuffing gland or o-rings on the spinning motor shaft, design for drips and put a small bilge pump under it venting overboard.  Need a good check valve and a stout pump for ambient, but its doable.
  



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