[PSUBS-MAILIST] (no subject)

Sun Oct 26 20:27:52 EDT 2014

I just finished reading Piccard's recollections of the Ben Franklin 
drift dive mission. I don't recall anything about compressing water.

Marc

On 10/27/2014 8:20 AM, Ken Martindale via Personal_Submersibles wrote:
> 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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-- 
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
Ducted fans: http://massflow.archivale.com/