Hi cliff,
Just wondering what exactly you were using as the environmentally
friendly coolant, as I am designing a similar system but was going to
use an oil based coolant instead. I would much prefer a safer
alternative in case of any leaks :)
Great job on the sub!
Thanks,
--Chris Burchett--
Cliff Redus wrote:
> Brady,
>
> No gear box, this is a high speed impeller and drive train. Top rpm
> will be around 5000 rpm. The shaft seal, as a consequence, had to be
> rated for high speed. I am using a double mechanical seal with the
> barrier fluid being a environmentally friendly coolant. This coolant is
> passed through a small shell and tube heat
exchanger that that uses high
> pressure water from the jet pump to force the water through the heat
> exchanger and then vent to ambient. The plate HP on the motor is 13 HP
> but for intermittent service, the the motor will put out over 40 break
> hp. The high voltage/high current wiring for the motor / controller is
> circuit protected at 400 amps to handle this loading.
>
> Cheers!
>
> Great works are performed not by strength but by perseverance.
> Samuel Johnson
>
>
> ----- Original Message ----
> From: Brady Burkhart <braydeebee@yahoo.com>
> To: personal_submersibles@psubs.org
> Sent: Friday, July 13, 2007 11:03:23 PM
> Subject: Re: [PSUBS-MAILIST] Interest in your project
>
> Yo Cliff!
>
> That's a nice looking project you have there. I was wonderingf if your
> 13
H.P. motor is running thru a gear box, and how many rpm do you expect
> out of the pump at full speed?
>
> Cheers!
>
> Brady
>
> */Cliff Redus <cliffordredus@sbcglobal.net>/* wrote:
>
> Norm,
>
> To see fabrication pics for my boat, the R300, go to the frappr
> link and hit more Cliff Redus' photos.
>
>
http://www.frappr.com/?a=viewphoto&id=2664457&pid=4280217&myphotos=1> <
http://www.frappr.com/?a=viewphoto&id=2664457&pid=4280217&myphotos=1>
>
>
> The initial fabrication of the boat is complete and I have started a
> series of commissioning test. She has been in the water for the
> initial tea bag test. For the last 6 months I have been building a
> house with me son so have not done any further work on the boat. I
> hope to be back on the test program after my son and family have
> moved into their new house. Initial test confirmed basic buoyancy
> states and hull/hatch integrity and identified a bad solenoid valve.
>
>
> The goal of this project was to design a one-man submersible,
> designated R300, following ABS regulations as much as possible( but
> not to the point of classing) that would be streamlined to reduce
> drag and entanglements and have adequate power for maneuverability
> using control surfaces. In other words, an underwater jet ski. I
> have four years invested to this point, two in design and two in
> fabrication.
>
> Fiberglass Reinforced Plastic, over syntactic foam, is used for the
> hydrodynamic shell that covers the pressure hull. There are two
> ballast tank systems, main and variable, which are soft and hard
>
respectively. The main ballast tank, comprising tanks forward and
> aft, are located at the longitudinal center of gravity of the boat.
> Likewise, the Variable Ballast Tank is also located at the
> longitudinal center of gravity. Both the MBT and the VBT are blown
> with air from four Catalina S-19 scuba tanks, regulated down to 25
> psi above ambient water pressure. Longitudinal trim is achieved by
> hydraulically articulating a sliding lead trim weight. A 120 VDC
> hydraulic power unit supplies high-pressure hydraulic fluid to power
> hydraulic cylinders on control surfaces and the hydraulic motor that
> articulates the trim weight. Boat systems are integrated
and
> controlled through an on board Programmable Logic Controller with a
> touch screen operator interface. The propulsion system utilizes an
> axial jet-ski impellor. The jet-ski nozzle is used for pitch and yaw
> control while wing mounted ailerons are used to control roll. A 13
> HP, DC series wound motor, connected to ten 12 VDC deep draft AGM
> marine batteries, is used to drive the jet-ski impellor. The motor
> is controlled with a MOSFET DC motor control unit. A drive shaft
> connects the drive motor to the jet pump. A hull seal around the
> drive shaft is a cartridge type double mechanical seal with an
> glycol coolant acting as a barrier fluid
between the seals.
>
>
> Specifications for the R300 are given below:
>
> R-300 SPECIFICATIONS
> <!--[if !supportEmptyParas]--> <!--[endif]-->
> * 24 inch acrylic hemispherical view port * 13 hp DC motor * Jet
> Impellor * MOSFET DC motor controller * 120 VDC main battery system
> *24VDC Emergency battery system * Water Hard Variable ballast
> system * Drop weight system * Fly-By-Wire Control System * Air
> systems * Oxygen system * Carbon Dioxide scrubber * Touch Screen
> Operator Panel/Display * Carbon dioxide & Oxygen level monitors *
> VHF Radio * Alarm and monitoring systems *
Mechanical and
> electronic depth meters * Electronic compass * Trim and heel
> indicators * External halogen lights * Fire Extinguisher * Onboard
> battery chargers *
> <!--[if !supportEmptyParas]--> <!--[endif]-->
> TECHNICAL DATA
> <!--[if !supportEmptyParas]--> <!--[endif]-->
> MAIN DIMENSIONS
>
> Length 19 ft
> Beam 6.5 ft
> Height 4.1 ft
> Draft 31 in
> Pressure Hull
diameter 30 inches
> Pressure Hull material ASTM A516 Grade 70
> Pressure Hull thickness 0.25 inches
> Dry weight (excluding payload and pilot) 4,214 lbs
> Operational depth 300 ft
> Payload capacity (including pilot) 232 lbs
> Drop weight 300 lbs
> Crew 1
> <!--[if !supportEmptyParas]-->
<!--[endif]-->
> PROPULSION & POWER SUPPLY
> <!--[if !supportEmptyParas]--> <!--[endif]-->
> Jet pump Jet pump, axial flow, single stage
> DC motor 13 hp DC motor with MOSFET motor controller
> Main batteries 10 @100 Ah / 120VDC
> Emergency battery 2 @100 Ah / 24VDC
> Battery endurance 7 hrs (normal operation)
> Emergency battery
endurance 72 hrs (hotel load only)
> <!--[if !supportEmptyParas]--> <!--[endif]-->
> GAS SYSTEMS
> <!--[if !supportEmptyParas]--> <!--[endif]-->
> Main ballast - Soft 7.6 scf
> Variable ballast - Hard 1.8 scf
> Air 76 scf / 207 bar
> Oxygen 78 scf / 139 bar
> Oxygen endurance 7+72 hrs
> Reserve of
Buoyancy 10.7%
> <!--[if !supportEmptyParas]--> <!--[endif]-->
> PERFORMANCE
> <!--[if !supportEmptyParas]--> <!--[endif]-->
> Normal speed 7 knots (8 mph) for 8 hrs
> Max speed 20+ knots for 9 minutes
> Range 66 miles (normal operations)
> <!--[if !supportEmptyParas]-->
>
>
> Cliff
>
>
> ----- Original Message ----
> From: Norman
<nparmley@suddenlink.net>
> To: personal_submersibles@psubs.org
> Sent: Wednesday, July 11, 2007 11:18:51 PM
> Subject: [PSUBS-MAILIST] Interest in your project
>
> Cliff Redus:
>
> Hi,
> Cliff can I get more info on your project. It looks vry interesting.
>
> Norm Parmley
>
>
>
>
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