[PSUBS-MAILIST] R300 Dive at Lake Amistad
Pete Niedermayr via Personal_Submersibles
personal_submersibles at psubs.org
Thu Jan 28 19:59:20 EST 2016
Why not cut the front off a small aluminum boat. Put enough foam in it so it doesn't sink away and use it as a subtowing "wake board"
--------------------------------------------
On Thu, 1/28/16, Cliff Redus via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
Subject: Re: [PSUBS-MAILIST] R300 Dive at Lake Amistad
To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
Date: Thursday, January 28, 2016, 6:43 PM
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
reasonsfor
that, I thought that tale section would just be
anappendage
now.That
was a shame about the visibility. Wait till you get in to
some reallyclear
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 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
-----Inline Attachment Follows-----
_______________________________________________
Personal_Submersibles mailing list
Personal_Submersibles at psubs.org
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
More information about the Personal_Submersibles
mailing list