[PSUBS-MAILIST] (no subject)
Alan via Personal_Submersibles
personal_submersibles at psubs.org
Tue Oct 28 13:20:56 EDT 2014
Thanks Brian,
all a bit bigger & more expensive than what I'm after.
I bought a brushless outrunner 1500W motor for $50-. & will play around with that.
Next step, if I can't find another solution, is to buy a 3000W & run it at half speed.
I guess I will need to couple it to a stainless propeller shaft.
Have been looking at frameless motors also.
Alan
Sent from my iPad
> On 29/10/2014, at 4:17 am, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
> Alan,
> Take a look at these guys, this is where I'm getting my motors.
>
> http://www.thunderstruck-ev.com/
>
> 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] (no subject)
> Date: Tue, 28 Oct 2014 04:35:53 +0000 (UTC)
>
> Ken,
> haven't heard from you for a while.
> I am trying to track down a suitable DC brushless motor around 1500W for a thruster.
> Preferably I don't want to gear it down, so I need an output speed of less than 3000rpm.
> The only brushless motors I can find with low rpm are the RC outrunner motors that
> you might find at Hobby King. I am looking at playing round with a larger motor &
> running it at 1/2 it's maximum voltage. They seem so small compared to their brushed
> counterpart that I don't think I will be disadvantaged size wise by doing this.
> Most of these motors seem to be low voltage, high amps, & I would prefer something operating
> on around 48V.
> Any words of wisdom or product recommendation here thanks.
> Alan
>
> From: Ken Martindale via Personal_Submersibles <personal_submersibles at psubs.org>
> To: 'Personal Submersibles General Discussion' <personal_submersibles at psubs.org>
> Sent: Monday, October 27, 2014 1:20 PM
> Subject: Re: [PSUBS-MAILIST] (no subject)
>
> Water is compressible, look how the submarine "Ben Franklin" did it. Water
> is just not very compressible.
>
> Ken Martindale
>
> -----Original Message-----
> From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org]
> On Behalf Of Marc de Piolenc via Personal_Submersibles
> Sent: Sunday, October 26, 2014 8:11 PM
> To: personal_submersibles at psubs.org
> Subject: Re: [PSUBS-MAILIST] (no subject)
>
> Compressing water will be quite some trick.
>
> Marc
>
> Ducted fans: http://massflow.archivale.com/ Archivale catalog:
> http://www.archivale.com/catalog Polymath weblog:
> http://www.archivale.com/weblog Translations (ProZ profile):
> http://www.proz.com/profile/639380
> Translations (BeWords profile): http://www.bewords.com/Marc-dePiolenc
>
>
> On 10/26/2014 11:06 PM, Graham Bayliss via Personal_Submersibles wrote:
> >
> > Hi Hank
> >
> > I agree a jet drive is the way to go did you not think that a jet ski
> > drive was to small and would only drive a small craft. I intend to
> > build a larger jet drive and compress the water. This will be easy and
> > add power to the system the jet drive from a jet ski would not drive a
> > sub but I am certain I can overcome the problems by building a larger jet
> drive and a compressor.
> > Thank you for your input and I will keep you informed as the project
> > un folds.
> >
> > Graham
> >
> > -----Original Message-----
> > From: Personal_Submersibles
> > [mailto:personal_submersibles-bounces at psubs.org]
> > On Behalf Of hank pronk via Personal_Submersibles
> > Sent: 26 October 2014 12:42
> > To: Personal Submersibles General Discussion
> > Subject: Re: [PSUBS-MAILIST] (no subject)
> >
> >
> > Graham,
> > In the world of marine jet drive it is well known that jet drive takes
> > two times the horse power to do the same job. Jet drive is well
> > suited to a craft that needs a shallow draft. I think you will find
> > it very complicated to control and it will be very inefficient. I have
> > been down this road, I love the concept but abandoned it. If you go
> > forward may I suggest you start with a jet drive. It is not a simple
> > part to replicate. The impeller tolerances are critical. I have a
> > jet unit on the shelf I could donate to your project. The jet is from
> > a jet ski. I would consider a single rear motor on a full gimbal.
> > Hank --------------------------------------------
> > On Sun, 10/26/14, Graham Bayliss via Personal_Submersibles
> > <personal_submersibles at psubs.org> wrote:
> >
> > Subject: [PSUBS-MAILIST] (no subject)
> > To: "'Personal Submersibles General Discussion'"
> > <personal_submersibles at psubs.org>
> > Received: Sunday, October 26, 2014, 7:39 AM
> >
> > #yiv9417249292
> > #yiv9417249292 --
> >
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> > #yiv9417249292 Hi I am near the end of my build of my k350 and have
> > started to look at new designs I am interested in building a flyer
> > sub and have come up with a design which will include a vectored
> > motor drive this will enable my flyer to hover and stop where ever I
> > want. I have designed a motor unit which will drive a fan type
> > propeller as an intake this will force water to the rear of the unit
> > where it is compressed then it is forced into ducting which will
> > take the water to four nozzles on the side of the craft. The nozzles
> > are able to turn three hundred and sixty degrees both side are
> > independent of one another so rolls will be achievable. The reason
> > for a vectored motor is you only need one motor source and one power
> > pack this will ease the maintenance and increase the enjoyment of
> > using your sub. I am interested in the clubs thought of this kind of
> > design. Graham
> >
>
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