[PSUBS-MAILIST] (no subject)
Marc de Piolenc via Personal_Submersibles
personal_submersibles at psubs.org
Sun Oct 26 20:13:22 EDT 2014
The fast cats I traveled on are owned by a shipping company. They make
30+ knots cruise on diesels and jets and make a profit...in the
Philippines. The more expensive ones to own and operate have gas
turbines and go 40+ knots. You don't find those here.
Marc
On 10/26/2014 11:15 PM, hank pronk via Personal_Submersibles wrote:
>
> Graham,
> A jet ski jet is gigantic for a psub. Jet ski's have 50hp and more, the one I have is from a 750 cc two stroke engine. Mine has a 3 inch nozzle at least maybe more. Jets are very bad for maneuvering, they have no grip in the water like a prop. Yes fast ferries use them but they are owned by governments, check the fuel tank size lol. I would do some reading about jet viruses props. Don't get me wrong, I love the idea, and it is a fun idea, I just don't think it will do what you imagine it will. I hope I am wrong.
> Hank --------------------------------------------
> On Sun, 10/26/14, Graham Bayliss via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
> Subject: Re: [PSUBS-MAILIST] (no subject)
> To: "'Personal Submersibles General Discussion'" <personal_submersibles at psubs.org>
> Received: Sunday, October 26, 2014, 11:06 AM
>
>
> 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
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> 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
>
> -----Inline Attachment Follows-----
>
>
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