[PSUBS-MAILIST] Motor Question

[hank pronk via Personal_Submersibles]

 James,I do not have this problem with the smaller motors, the brushes are at the other end of the motor, opposite the propeller end.  On my DDW, I am using 4X  30 lb thrust motors.  I find with the visibility we have there is no need for faster bottom travel.  I would say being similar in size to your new sub, no more than 50 LB is needed.   I have a video on how to modify them and it takes about 20 min per motor.  
I also have 50 lb motors that I actually drilled the motor body and screwed in penetrators with short leads that plug into the brushes.Hank
    On Tuesday, November 21, 2023 at 09:55:59 AM MST, James Frankland via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  
 
 Hi All
Anyone got any suggestions for this?

I am thinking about what motors to get for my new boat.  I designed it up using dimensions from my existing Minn Kota 80's.
On Jodie B I have 3 of these which totals 240lb thrust. which is more than i need really.  I can run on just the rear for surface driving.
On the new boat i will have 4 motors.
Im thinking of smaller ones.  Something along the lines of 4 x 40-50lb would probably be ok.
The biggest thing I want to try and avoid is the difficulty of the wire location that i have on the Minn Kota 80's.  The location is ok if the cable runs up the shaft as intended in the standard motor design as you can pull them tight and clear, but once I potted the replacement shaft, the cables then become very troublesome to keep out of the way of the armature\commutator\brush assembly.
Some other people have experienced this as we have discussed it before.
Rubbish drawing attached.  You can see the blue part is the potted connections which make the wires onto the brushes really tricky.  


Does anyone know of a motor that would be easier to modify or where the shaft hole is in a more convenient place?
Any suggestions?
Kind Regards
James

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