[PSUBS-MAILIST] Motor Question

[James Frankland via Personal_Submersibles]

Thanks Hank.  I think i have seen your video.  I will take another look.



On Tue, 21 Nov 2023 at 18:30, hank pronk via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> 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.
>
> [image: image.png]
>
> 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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