[PSUBS-MAILIST] Brushless Thruster

[hank pronk via Personal_Submersibles]

Alan,That is great! well done..  What type of mechanical seal will you use?  Are you planning a spring loaded pump seal?  Hank  

    On Monday, October 3, 2016 2:07 AM, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
 

 Just did a pool test of my latest brushless thruster.
This thruster uses a 60kv (revs per Volt) 6374 (dimensions in mm) brushless
sensored outrunner motor. The propeller was a 3 bladed 7&1/4" x 4" with no kort nozzle.
I was getting 30kg (66lb) thrust from 30 amps off 52 volts (1560W) with the thruster
oil filled. This seems comparable to what Cliff was getting from his Minnkota 101.
The difference is this is a much smaller unit. I have been keeping a file on
performance statistics of commercial thrusters & trolling motors & this is slightly 
above average.
The manufacturer told me not to run the motor more than 40 amps continuosly,
so I am being conservative with the 30 amp draw. I could bump it up by putting
on a bigger prop.
Next step is to use it as a boat motor & notch up 100 or so hours, then build
another housing with a mechanical seal.
Added a couple of photos to the project page, but they loaded upside down for
some reason. Couldn't change them. 
 http://www.psubs.org/projects/1235435392/brushlessthruster/
Alan

Sent from my iPad
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