[PSUBS-MAILIST] R300 Dive at Lake Amistad

Thu Jan 28 19:43:57 EST 2016

Alan, I have thought about building this kind of system.  Have you ever
worked with materials like they make pontoon boats out of?  I wonder how
hard it would be to seal.  Sounds like another project.

Cliff

On Thu, Jan 28, 2016 at 4:18 PM, Alan James via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Cliff,
> I'm wondering if you could make or modify an inflatable pontoon.
> Sort of like an inflatable boat with the back board removed.
> Deflate it, drive on & inflate for transit.
> To a degree it would solve your free board issues when getting in & out,
> also it would act as a wave buffer stopping the waves flowing up the hull
> & in to the
> hatch.
> Alan
>
>
>
> ------------------------------
> *From:* Alec Smyth via Personal_Submersibles <
> personal_submersibles at psubs.org>
> *To:* Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> *Sent:* Friday, January 29, 2016 10:25 AM
> *Subject:* Re: [PSUBS-MAILIST] R300 Dive at Lake Amistad
>
> If you towed submerged, my guess is with the shape of your boat you could
> go a whole lot faster because you wouldn't be trapped in the trough of your
> bow wave. But on the other hand you would be above your comms speed, so
> slightly concerning if you were tearing along and had some issue.
>
> Best,
>
> Alec
>
> On Thu, Jan 28, 2016 at 3:46 PM, Cliff Redus via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Hugh, I am sure if I installed dive planes on the bow I could improve
> surface speed but might adversely affect ability to roll.  I found on the
> last dive that I could use the vertical thrusters to generated a little
> lift  and get anther couple of knots on the surface. To conserve batteries,
> I would probably tow the boat if I had to go more than a couple of miles.
> One of the mods I am going to test next time out is to make an attachment
> lug closer to the bottom of the bow  I would screw this lug into the 2"
> forward MBT flood port.  I think towing from this lower location
> should counter act the bow wave to some degree.  If I could get the tow
> speed up to 5-6 knots, that would make a big difference in tow time.
>
> Cliff
>
>
>
> On Thu, Jan 28, 2016 at 1:55 PM, Hugh Fulton via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Cliff,  Congratulations on the dive and success of the remodeling.
> I was interested in your comments of the restrictions of speed on the
> surface due to the bow wave/visibility.  Makes sense.
> Can you not put on dive/surface planes to assist lift on the surface and
> then increase speed.  Could try on a model in a pool.
> Regards,  Hugh
>
>
> *From:* Personal_Submersibles [mailto:
> personal_submersibles-bounces at psubs.org] *On Behalf Of *Cliff Redus via
> Personal_Submersibles
> *Sent:* Friday, 29 January 2016 3:41 a.m.
> *To:* Personal Submersibles General Discussion
> *Subject:* Re: [PSUBS-MAILIST] R300 Dive at Lake Amistad
>
> Alan, operation of the four Minn-Kota thrusters was a joy.
> Maneuverability is an order magnitude better than before plus they are
> super quite. I use a foot control that you tilt forward to increase speed
> of stern thrusters and if you tilt the foot control back you can reverse
> the stern thrusters.  With this I now have brakes.   I have a 3-axis joy
> stick which I use to control pitch, roll and yaw through PLC. I programed
> three different vertical thruster modes. The first is full control in
> which starboard-port movement generates roll, the second in which I switch
> them over to momentary  switches for up and down movement and have them
> locked together and a third in which I have them back on the joystick but
> lock out roll.  I use the first mode when I want to fly underwater with
> full pitch, roll and yaw control.  I use the second mode for vertical
> ascent or decent and the third mode which gives yaw and pitch movement
> but locks out roll movement.  On the surface I have to be careful not
> to apply  full speed to aft thrusters or they will cavitate. On the ascent
> from the 154 ft dive, I could see out the viewport a steady stream of
> bubbles coming from the pressure reducing regulator used to pressure
> compensate the thrusters.  Also, after the dive I analyzed the logged data
> and confirmed that during each dive air was been supply to the thrusters
> for pressure compensation.  I have not done so yet but I plan on
> disassembling one of the thrusters to confirm it had no water encroachment
> during the dive.  I am really happy with the Minn-Kota thrusters.  After a
> full day on the water, I had a SOC of 90%.  With my previous drive train,
> my batteries would be at a 50% SOC for same number of hours.  As to boat
> length, I did end of shortening the boat by 2.5 ft. I also shortened the
> trailer by 3 ft.  As the pressure hull is shaped like a coke bottle, I
> could not cut much more off the stern FRP cowling.
>
> After I do a 400 ft unmanned dive to qualify the boat to 300 ft, then I am
> going to find some clear water.  How you doing for garage space?  I sure
> you could find me some nice clear water in New Zealand!
>
> Cliff
>
> On Wed, Jan 27, 2016 at 9:40 PM, Alan James via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
> Thanks Cliff,
> congratulations on getting the refit finished.
> How did you feel it operated with the 4 Minn kotas.
> What was the steering like on surface & diving.
> I notice you didn't shorten the sub. What were the reasons
> for that, I thought that tale section would just be an
> appendage now.
> That was a shame about the visibility. Wait till you get in to some really
> clear water, you will be blown away.
> Cheers Alan
>
>
> ------------------------------
> *From:* Cliff Redus via Personal_Submersibles <
> personal_submersibles at psubs.org>
> *To:* Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> *Sent:* Thursday, January 28, 2016 11:07 AM
> *Subject:* Re: [PSUBS-MAILIST] R300 Dive at Lake Amistad
>
>  Lake Amistad 2016 <https://www.youtube.com/watch?v=Ojwoedzn8ms> is a
> link to YouTube video of dive last weekend.  This is the deepest dive to
> date with the boat.  Got the thruster electrical issue from my last dive
> sorted out.  The objective in diving this lake is that it is the deepest in
> Texas and most of the time, the clearest.  Having said that, last weekend
> visibility was bad.  Surface vis was 6ft, lost all light at 80 ft and zero
> visibilty at 154 ft.  Still if was fun to get the deep dive in.
>
> Clif
>
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>
>
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>
>
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>
>
>
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>
>
>
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>
>
>
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20160128/64ec1b86/attachment-0001.html>