[PSUBS-MAILIST] (no subject)

Sun Oct 26 20:15:54 EDT 2014

Agree that a jet-ski jet would not be suitable for a sub. Wrong cruise 
speed, wrong input shaft speed, wrong horsepower input, wrong mass flow. 
One of the reasons that jets are still a fringe item is that they have 
to be custom designed essentially for every application.

Marc

On 10/26/2014 11:16 PM, hank pronk via Personal_Submersibles wrote:
>
> Graham,
> message me at hankpronk at live.ca  I am happy to send you some stuff.
> 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
>    #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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