[PSUBS-MAILIST] temporary propulsion

Fri Oct 21 23:39:41 EDT 2016

Brian,
they will still need a pressure compensating system, bladder or similar.
And I would check how the wires come out of the motor to see that 
nothing is going to burst under pressure.
The 35hp is 26,000W. The larger motor draws up to 650 amps, so you
will need to make sure the batteries can handle that draw continuously.
4 x 24V 100 ah batteries at 50% depth of discharge will last about 10
minutes on full power. 
Nothing is simple & straight forward with these subs :(
Cheers Alan

Sent from my iPad

> On 22/10/2016, at 3:45 pm, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Alan,  they are oil filled !   One on each side. More power is better !!   Just in case I have to get away from a giant squid ,  or fish and game !   my sub will be 8 tons when all is said and done.  Was thinking 8 deep cycle AGM batteries , 4 for each motor.  
>  
> Brian
>  
> PS:  Everybody is arming themselves !  luckily my drop weights will double as cannon balls !
>  
>  
> 
> --- personal_submersibles at psubs.org wrote:
> 
> From: Alan via Personal_Submersibles <personal_submersibles at psubs.org>
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] temporary propulsion
> Date: Sat, 22 Oct 2016 15:27:46 +1300
> 
> What a beast! Do you need all that horsepower, as you will need a 
> huge battery bank to take advantage of it. That is not a bad price with
> controller included from what I have seen of other systems.You will need a pressure compensating system to take it down deep. How many motors? & how are you
> going to configure them. 
> Alan
> P.S. Really enjoying your elections down here in N.Z. can't wait for the next
> episode of "Saturday night live"
> 
> 
> Sent from my iPad
> 
> On 22/10/2016, at 2:48 pm, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Alan,    The motor could go into the water the way it is, attach the prop directly to the motor shaft.
>  
> Brian
> 
> --- personal_submersibles at psubs.org wrote:
> 
> From: Alan James via Personal_Submersibles <personal_submersibles at psubs.org>
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] temporary propulsion
> Date: Sat, 22 Oct 2016 01:35:43 +0000 (UTC)
> 
> Ouch $4000-, would you have to replace the shaft with
> a longer propeller shaft?
> What combined hp. are you looking for. How many motors?
> Have you sorted the motor controller for the motors?
> Alan
>  
> 
> 
> From: Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org>
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
> Sent: Saturday, October 22, 2016 12:18 PM
> Subject: Re: [PSUBS-MAILIST] temporary propulsion
> 
> Alan,
>                  I still plan to use those motors, but they are expensive. $4000 each   Been spending money like a drunken sailor, so I was trying to brainstorm a cheppo solution ;-)   I still kind of like the fact that a mass produced motor like the ones showed could be a cheap alterative .  Those little Honda generators are quite amazing , very compact, quite, and they sip the gasoline.  I noticed a lot of sailboat people would use them for house power instead of firing up they're onboard engines, they would set them out on the bow. 
>  
>  
> Brian  
> 
> --- personal_submersibles at psubs.org wrote:
> 
> From: Alan via Personal_Submersibles <personal_submersibles at psubs.org>
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] temporary propulsion
> Date: Sat, 22 Oct 2016 07:49:04 +1300
> 
> Hi Brian,
> what happened to the high powered motors you were looking at a while back?
> These motors are huge & only put out 1/3 rd horsepower. Minn kotta is 2hp. There is a 
> lot of work making a housing for them. The shaft would have to be extended to fit another bearing, seal & the propeller, let alone all the work for a housing that is bolted together &
> sealed with a wiring entry welded on.
> If you are just wanting to do buoyancy / stability tests before you invest in thrusters,
> why not have a small inflatable tender with outboard to drag it round.
> Alternatively look on Cliffs project page on his Minn kotta modification, as he has done
> some good work on them that may be helpful.
> Cheers Alan
> 
> Sent from my iPad
> 
> On 21/10/2016, at 4:55 pm, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Hi All,
>                      Been thinking about how I'm going to get around the harbor with my sub.  I'm thinking that for the time being I'm just going to run ( on the surface) a 2000 watt Honda generator and then for the motors , use these 1/3 HP dryer motors in a oil flooded housing, probably made out of aluminum tubing.  They obviously run with 120 V  AC power. 
>  
>   Since on my sub I will have dual motors on each side, port and starboard, I was thinking to also have additional motors facing foreword to stop my foreword progress ( a brake)   .  
>  
>  These dryer motors can be got really cheap , new they're about $75.00  I'm pretty sure they would be ok flooded with oil.   So I would have a total of 4 motors , two on each side one going frontwards and one opposing .  It would be a totally on or off drive of course , with no speed control. 
>  
>  
> Here's a video of the motors I'm talking about. 
>  
>  
>    https://www.youtube.com/watch?v=uIrCUh1S8x8
>  
>  
> Brian
>  
>  
>  
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