[PSUBS-MAILIST] got motors

Sun Oct 30 05:23:57 EDT 2016

Brian,Yes your motors are more modern than what I am used to with the open end and all.  Sounds like you have a plan and lots of spare parts.Hank 

    On Saturday, October 29, 2016 11:01 PM, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Hank,   So far from what I see is that these motors run quite fast , there are some that do run in the 1600 rpm range , but the ones I'm looking at ( 3 hp ) run around 4000 rpm.  But that's ok because what I think I'm going to do is use the rear end differential for running the prop.  It's really made to order and will get the rpm down to around 500 .  Which would be fantastic, I could get a whole bunch of torque out of the motor, run a big multi blade large prop and cruise .  All I would need to do is secure one side of the differential and use the other side as the drive shaft.  It's a very tight little gear box which would fit inside a 14" pipe, with another 8" pipe welded to it off center to house the motor.   Brian 

--- personal_submersibles at psubs.org wrote:

From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] got motors
Date: Sat, 29 Oct 2016 19:38:05 +0000 (UTC)

Brian,If I recall Gamma ran about 1,800 rpm with the golf cart motor.   The support shaft is removed by unscrewing it, if it is stubborn, throw a little  heat at it.  Then there are potting options for the wires.  I prefer to drill in two electrical penetrators into the motor body and plug the hole from the support rod.  That works well if your motors are fixed solid.  If the motors  need to rotate, then you make a penetrating shaft with the wires potted inside the new shaft.If you just want to putter around the test area, then just clamp them on the sub as they are.Hank 

    On Saturday, October 29, 2016 12:42 PM, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Hank,      I didn't think they were such low rpm, I'll have to look that up from the name plate on line.    I also have two trolling motors, one is a Johnson and the other is a 30 lb thrust minikota,  not sure how powerful the Johnson is since there is no info on the motor .  On those trolling motors there is a support shaft that comes up from the back and has the wires in there, what does everybody do with that?  is that removed and then some sort of seal put in and the wires potted in? Brian  

--- personal_submersibles at psubs.org wrote:

From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] got motors
Date: Sat, 29 Oct 2016 01:31:02 +0000 (UTC)

Brian,Nice, but keep it simple!  make a housing and end cap with a simple seal, either a spring seal or an o-ring.  The beauty of these motors is the low rpm.  Gamma used to have a 2 hp golf cart motor, well really a 3 hp running on 24v is 2 hp.  That was the entire drive.Hankhey why is the ground not white, it looks green? 

    On Friday, October 28, 2016 6:50 PM, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Hi All,              Looks like I'll be getting motors every week over the next month or so, kind of a slow dribble ( like wiki leaks ! only with motors !)  .  My new found friend over at the golf cart place is going to be ridding himself of all these carts that have been piling up.  But he has to see what is what, so at the end of every week I'll be hauling away motors !  today I got two motors (48 VDC) plus a drive shaft/ gear box.  I'm thinking that I should use the gear box as part of my drive.  One good thing about it is that it is an in-line configuration rather than a 90 degree.  Also it's a 6 to 1 reduction which is really great.  I might be able to make a custom pod to house everything.  I would like to run the whole thing in oil. Pics:  Brian 
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