[PSUBS-MAILIST] Towing...
via Personal_Submersibles
personal_submersibles at psubs.org
Wed Sep 9 17:08:08 EDT 2015
Sure, why not? It would still help to snub the bow in a straight line. And for dives, the harness could be lashed short to that forward lift point, maybe, and left in place during a dive. We used to do that with the lift rig on Aquarius, which was two big nylon straps and a welded metal hoop. Just stuffed it down into the sail beside the conning tower and went on about out business. And try some different speeds for towing. Most people tow too slow, making the sub hunt back and forth, never finding a true course. It might be worth a few minutes, just to find that best speed. NOTE: By the way, the best speed (if the MBTs aren't spewing air) is just about half a mile an hour more than you think it is. The sub will be closer to underwater than not, kicking up quite a wake to make you nervous, and somewhere in there it seems to stabilize and come merrily along just like it knew what it was doing. The Nektons towed at 10 knots, remember. Not Gamma anymore, sadly, but the idea is sound. Their tow point was just under the nose of the forward ballast tank (below the centerline of the hull by a few inches--just in case that gives you an idea).
Vance
-----Original Message-----
From: Alan James via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Sent: Wed, Sep 9, 2015 4:39 pm
Subject: Re: [PSUBS-MAILIST] Towing...
Vance,
what about towing from a low point at the front?
One of my thoughts was to have a low frontal tow point with a short length
of rope from it with a clip on the end. This is clipped on to a higher point on the sub
when not in use & clipped on to the towing rope when needed. This is so that you don't get wet
trying to attach to a point below the water line.
Alan
From: via Personal_Submersibles <personal_submersibles at psubs.org>
To: personal_submersibles at psubs.org
Sent: Thursday, September 10, 2015 6:35 AM
Subject: Re: [PSUBS-MAILIST] Towing...
James,
Before you weld towing eyes on the front of your battery pods, you might try making some circular clamps to go around the front of each pod and attach towing eyes to those.
That way you could test the concept first and possibly refine it.
Jim
In a message dated 9/9/2015 1:10:29 P.M. Central Daylight Time, personal_submersibles at psubs.org writes:
The Bionic Guppy is pretty long and heavy though.
Hank
From: via Personal_Submersibles <personal_submersibles at psubs.org>;
To: <personal_submersibles at psubs.org>;
Subject: Re: [PSUBS-MAILIST] Towing...
Sent: Wed, Sep 9, 2015 5:02:51 PM
If you pick up those three towing points so that everything pulls evenly in calm water, it will go a long way toward keeping things stable when things start pushing and pulling in different directions.
Vance
-----Original Message-----
From: James Frankland via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Sent: Wed, Sep 9, 2015 12:04 pm
Subject: Re: [PSUBS-MAILIST] Towing...
Thanks Vance,
I did think of maybe towing from the battery pods. Maybe i'll weld on a couple of towing eyes. Something else I should have thought of before.....
will check out options later.
regards
James
On 9 September 2015 at 16:38, via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
The force applied that high and that close to the center of gravity will make her dive and squirm. Pull hard enough, she'll crab out to one side and roll toward the boat. It will be hard not to spill your tea.
Vance
-----Original Message-----
From: James Frankland via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Sent: Wed, Sep 9, 2015 9:21 am
Subject: Re: [PSUBS-MAILIST] Towing...
That's what I was thinking. However, there is a video of someone towing Bionic Guppy and they are pulling it from the lifting eye. Different boat though.
https://www.youtube.com/watch?v=ApUnGjTb4DQ
On 9 September 2015 at 12:23, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
Hi James,
I think you need to tow from the front leading edge to avoid crabbing.
Hank
On Wednesday, September 9, 2015 3:36 AM, James Frankland via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
Hi All,
Has anyone towed a K boat from the forward lifting eye?
I am going to tow my boat to a better diving location. I think the best place to tow it would be the very front, on the hand rail mounting post. At this point there is a 20mm stainless bar bolted through the forward tank and into the framework. Although its a thick bar, I have a feeling it might get damaged if I tow the boat from that point. Forward lifting eye would be better but ive got a feeling it might now tow very well.
Any thoughts?
Thanks
James
_______________________________________________
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
_______________________________________________
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/20150909/76bdb496/attachment-0001.html>
More information about the Personal_Submersibles
mailing list