[PSUBS-MAILIST] R300 mods

Fri Jul 25 12:37:53 EDT 2014

Cliff, with that hot rod you might want "hydro-brakes", back aft somewhere.
 :-)

Paul

On Thu, Jul 24, 2014 at 7:38 PM, Clifford Redus via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Yes the jet pump is powerful and can develop great submerged speed.
>  Surface speed is limited by the hull shape.  When I get over about 5 knots
> on the surface a bow wave forms and forces the boat to dive.  The main
> propulsion motor being inside the pressure hull along with the double
> mechanical seal generates a lot of noise.  The re pitched impeller develops
> a lot of thrust when moving forward but in reverse, very little so with the
> body being streamlined it is hard to stop fast.
>
> Re
> Cliff Redu
>
> On Jul 24, 2014, at 8:37 PM, Alan James via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Hi Cliff,
> looking at your intended R300 modifications; have you considered just
> having 2 rotating thrusters
> & keeping your jet pump. This will leave you with a similar set up to Alec
> & Emile, which work well.
> Also you would have a measure of redundancy. If you have 4 fixed motors &
> a rear motor stops you will go
> round in circles.
> You could rototate the thrusters with electric motors inside the hull.
> Perhaps have the motors attached to the side planes & have them rotating.
> Sorry to get on your case again, but my previous build & next are similar
> to the R300 in ways
> & have been milling over this stuff a lot. Also that jet pump is too good
> to loose. It gets you across the surface
> really quickly.
> Alan
>
>
>   ------------------------------
>  *From:* Cliff Redus via Personal_Submersibles <
> personal_submersibles at psubs.org>
> *To:* Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> *Sent:* Wednesday, July 23, 2014 3:34 PM
> *Subject:* Re: [PSUBS-MAILIST] O2 regulator
>
> I am working on two projects, the first is some mods to the R300. I have
> come to the conclusion that speed is an illusion for the mud holes of
> Texas.   I am pulling the jet pump and drive train and ailerons and replace
> with four fixed MK-101's.  Slower speed but better low speed
> maneuverability.  Moving from 120VDC battery bank to 36VDC.
>
> The new boat is a 1-atm, I person ADS designed for 500 fsw, pilot stands
> in a vertical position .  Dry weight 2940 lbs with 30% ROB.  Height 7'1",
> beam 6'6" draft 4'9", 200 SCF air/237 bar, 87 SCF O2/129 bar.   22" x 4"
> thick flat acrylic main viewport, three 8" side viewprots.  Uses four
> MK-101 with kort nozzles, two vertical and two horizontal.  Three axis joy
> stick.  See attached pic.  Battery pods low, upper pods are MBT.  Uses a
> version of the pancake style vent valve you discussed at the last psub
> convention.  Life support for 72 hours.  Just finished all the electrical
> design, working on electrical penetrators. Working on designing the
> exterior PLC pod.  FRP cowling, 0.25" A517-70 shell. Working on housing for
> 24V 5000 lumen LED lights. Will use seven of these. Life
> support/communication gear/PLC/touchscreen/scrubber similar to R300.
>
> Need to retire again to work on this.
>
>
>
> Cliff
>
>
>
>
>   *From:* via Personal_Submersibles <personal_submersibles at psubs.org>
> *To:* personal_submersibles at psubs.org
> *Sent:* Tuesday, July 22, 2014 9:30 PM
> *Subject:* Re: [PSUBS-MAILIST] O2 regulator
>
> New boat?
>
>  Vance
>
>
> -----Original Message-----
> From: Cliff Redus via Personal_Submersibles <
> personal_submersibles at psubs.org>
> To: Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> Sent: Tue, Jul 22, 2014 9:15 pm
> Subject: Re: [PSUBS-MAILIST] O2 regulator
>
>    On the R300, I use a MAX-250 O2 sensor from Maxtec. While this has
> worked fine, it is just the sensor element.  You need a circuit board to
> convert to 0-5 VDC analog signal the PLC can take as an input.  I had a
> friend design and fabricate the board several years ago.
>
>  For the new boat I am designing, I like the UV-FLux 25% sensor from CO2
> meters inc.
> http://co2meters.com/Documentation/Datasheets/DS-CM-0201-UV-Flux.pdf
> This sensor will handle 0-25%.  The sensor output is 3.3V TTL level RS232.
> All PLCs will have a RS232 port.  I would have preferred the output to be
> an analog voltage output of 0-5 VDC like the CO2 sensor from them I use but
> this will work ok.  With this sensor you can connect directly to PLC.
>
>
> http://co2meters.com/Documentation/Manuals/Manual-CM-0201-UV-Flux-Oxygen.pdf is
> the manual for the sensor.
>
>  Cliff
>
>
>
>
>
>
>
> Cliff Redus
> Redus Engineering
> USA mobile:  830-931-1280
> cliffordredus at sbcglobal.com
>
>    *From:* Pete Niedermayr via Personal_Submersibles <
> personal_submersibles at psubs.org>
> *To:* Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> *Sent:* Tuesday, July 22, 2014 5:54 PM
> *Subject:* Re: [PSUBS-MAILIST] O2 regulator
>
>
> Cliff, I forgot to ask. What are you using for an O2 sensor ?
>
> Thanks Pete  --------------------------------------------
> On Sat, 7/19/14, Alan via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Subject: Re: [PSUBS-MAILIST] O2 regulator
> To: "Personal Submersibles General Discussion" <
> personal_submersibles at psubs.org>
> Date: Saturday, July 19, 2014, 1:01 PM
>
> That's a
> great link Cliff, have bookmarked it.I am wanting
> something to link to a plc & they have some treat
> options.How come you didn't buy a unit with a
> wider range?Phil's life support paper is
> saying we can take 3% for 1 hour, but therange on
> the one you bought is 0 to 1%.Sorry you
> aren't making it to Bellingham. It was a real treat
> seeing the R 300in
> Florida.Alan
>
> Sent from my iPad
> On
> 19/07/2014, at 12:25 pm, Cliff Redus via
> Personal_Submersibles <personal_submersibles at psubs.org>
> wrote:
>
> I use a K-30, part
> number SE-0018 , 0-10,000 ppm (0-1%) CO2 sensor from a
> company CO2 meters inc. The cost is $85 and it sends a 0-5
> VDC output sensor.
>
> http://www.co2meter.com/collections/co2-sensors/products/k-30-co2-sensor-module Has
> worked flawlessly.
> Cliff
>
>
>
>
> Cliff Redus
> Redus Engineering
> USA
> mobile:  830-931-1280
> cliffordredus at sbcglobal.com
>
>         From: Pete
>   Niedermayr via Personal_Submersibles <personal_submersibles at psubs.org>
>   To: Personal
> Submersibles General Discussion <personal_submersibles at psubs.org>
>
>   Sent: Friday, July 18,
> 2014 7:05 PM
>   Subject: Re:
> [PSUBS-MAILIST] O2 regulator
>
>
>
> Cliff, What are you
> using for a CO2 sensor?
>
> Thanks Pete
>
> --------------------------------------------
> On Thu, 7/17/14, Cliff Redus via
> Personal_Submersibles <personal_submersibles at psubs.org>
> wrote:
>
>   Subject: Re:
> [PSUBS-MAILIST] O2 regulator
>   To:
> "Personal Submersibles General
>   Discussion" <personal_submersibles at psubs.org>
>   Date: Thursday, July 17, 2014, 8:30 AM
>
>   Hank
>   On the
> R300, I have life support
>   module I call the
> AMOC system (Air monitoring and Oxygen
>
> Control).  Connected to the box is a 1/4" SS tubing
>   with Swagelok fittings connected to a O2
> supply from an
>   external 2200 psig O2
> bottle. I fill this with welding O2
>   with a
> whip.    In the AMOC module is a medical pressure
>   reducing regulator (Hudson model 2000).  This
> regulator
>   reduces the pressure to around
> 5 psig.  The pressure
>   downstream of the
> regulator is adjustable with a maximum
>   rate
> of 15
>   SLPM.  The porting on this regulator is two
>   1/4" NPT HP ports and one LP
> port.  Downstream of
>   this regulator, I
> have installed an O2 thermal mass meter/
>
> controller from Porter.
>   The model
> number is 201-FSVP.  This controller can be set
>   from 0-10 SLPM via an 0-5V analog input
> signal. Max
>   pressure on the O2 controller
> is 25 psig.  This O2
>   controller also sends
> out at 0-5V analog output signal of
>   the O2
> SLPM flow rate.
>   Both these items were
> purchased on
>   Ebay at a fraction of
> list.    I have been very happy
>   with
> the performance of these units.  By measuring the O2
>   and CO2 percentages in the cabin, I have a PLC
> that opens
>   and closes this controller to
> keep the
>   cabin O2 % between
>   19-22%.  ABS
> regulations requires that the O2 be held with
>   in 18-24%.  The advantage of this system is
> that it
>   automatically accounts for
> different metabolic consumptions
>   rates for
> O2.  In the AMOC unit, I have a Swagelok needle
>   valve in a bypass around this controller so
> that if both
>   main and back up power are
> lost, the pilot can manually
>   adjust the O2
> rate
>   into the boat.
>
> The
>   second part to controlling the
> atmosphere in the cabin is
>   scrubbing the
> CO2.  I initially used a axial flow filter
>
> with SodaSorb HP.  I found that the axial flow filter
> did
>   not work very well with CO2 in the
> cabin ranging from 0-7000
>   ppm.  Part of
> the problem was the axial
>   filter arrangement
>   and part of the problem
> was the blower was not strong
>   enough.  At
> the 2012 PSUB convention in Vancouver, Alec
>
> Symth brought the scrubber he was using on Snoopy as a
>   show and tell.  His scrubber is an OTS radial
> filter that
>   is used to clean air.  In
> 2013, I switch to this type of
>
> scrubber/filer again with SodaSorb HB and the scrubber
> has
>   worked much better.  It consistently
> keeps the CO2 level
>   below 2000 ppm with
> most of the time it being 1000-1500
>   ppm.
> ABS rules require that you keep O2 concentration
>   below 5000 ppm.  Part of the reason that is
> works better
>   is the radial design which
> minimizes the pressure drop
>   through the
> Sodasorb and part is that I have switched to a
>   stronger blower.
>   Long
>   answer to short question.
>
>   Cliff
>
>
>
>
>
>       On Thursday, July 17, 2014 9:27 AM,
>   hank pronk via Personal_Submersibles
>   <personal_submersibles at psubs.org>
> wrote:
>
>
>   Hi All,I need to find a pediatric
>   flow meter and regulator for Gamma.  Or is
> there something
>   better?Hank
>
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