Re: [PSUBS-MAILIST] Surplus Thrusters?

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 Tecnadyne thrusters. 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.