Re: [PSUBS-MAILIST] Surplus Thrusters?

[greg@snyderemail.com]

THANKS Cliff!
I never thought of that.  Like Rick I am building an ambient so I only
need to go to 125 ft if I am lucky. I can see how a deep diver would want
something much more beefy.
Best regards-
Greg


> Greg,  I am not knocking the Minn Kota's.  If I can not find used
> commercial grade thrusters at a reasonable price, I will go with Minn
> Kota's.  Commercial grade thrusters are design from the ground up to be
> thrusters.  The biggest market for thrusters is the ROV industry.  In the
> area I work which is off shore oil and gas , day rates for deepwater
> drilling rigs can run over $400,000 per day.   When a ROV goes into water,
> it has work or it cost the operator big time.  So thrusters on these units
> are heavy duty and very reliable as a rule.  Also there is the issue of
> duty cycle. Commercial thrusters are meant to operate many hours a stretch
> on a day in and day out basis.  These points imply to me at least that
> commercial thrusters are probably more reliable than a converted boat
> trolling motor.  Reliability does not come cheap.  I got a quote on some
> Tecnadynethrusters.  For thrust on the order of 60 lbs, your talking $8000
> per thruster.  This does
>  include the cost of the control electronics.
>
>
>  Cliff
>
>
>
>
>
> Cliff Redus
> Redus Engineering
> USA Office:  830-663-6445
> USA mobile:  830-931-1280
> cliffordredus@sbcglobal.com
>
>
>
>
> ________________________________
> From: "Gregory B. Snyder, MD" <greg@snyderemail.com>
> To: personal_submersibles@psubs.org
> Sent: Tuesday, October 20, 2009 1:56:03 PM
> Subject: Re: [PSUBS-MAILIST] Surplus Thrusters?
>
> Hi Cliff
> I am curious, has there been a reliability issue with Minnekota?  Thanks
> Greg
> Gregory B. Snyder, MD
> ________________________________
>
> From:  Cliff Redus <cliffordredus@sbcglobal.net>
> Date: Tue, 20 Oct 2009 10:47:11 -0700 (PDT)
> To: <personal_submersibles@psubs.org>
> Subject: Re: [PSUBS-MAILIST] Surplus Thrusters?
>
> I am looking for four surplus/used  thrusters for my next boat, two at
> around 100 lbf thrust and two around 50 lbs.  The depth rating is 1000
> fsw.  While most psubs go with pressure compensated  Minn Kota trolling
> motors I am looking for some used commercial thrusters to improve
> reliability.
>
> If anyone has some thrusters they would be willing to part with and know
> of a source, let me know.
>
>  Cliff R
>
>
>
> ________________________________
> From: Jay K. Jeffries <bottomgun@mindspring.com>
> To: personal_submersibles@psubs.org
> Sent: Monday, October 19, 2009 9:24:25 PM
> Subject: RE: [PSUBS-MAILIST] Continuing saga of homebrewed Chinese sub
>
>
> Frank,
> I tried capturing it but had no luck with the various different programs
> that I hold.  Agree that it would be good to have a copy for future
> purposes.
> R/Jay
>
> From:owner-personal_submersibles@psubs.org
> [mailto:owner-personal_submersibles@psubs.org] On Behalf Of
> ShellyDalg@aol.com
> Sent: Monday, October 19, 2009 10:22 PM
> To: personal_submersibles@psubs.org
> Subject: Re: [PSUBS-MAILIST] Continuing saga of homebrewed Chinese sub
>
> Hi Jay. We should save that video on the psub site for obvious reasons.
> Frank D.





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