> .....Three questions/comments: > >> > Bob's questions (>>), followed by Harold's responses (>), followed in turn by Bob's further comments: Bob:>> 1. Why would you want to elevate your stern when towing? Harold:>1. I wouldn't. But even with a short (15 ft) tow, the lift seems like it >would be very minimal -- you're looking at a triangle with the vertical side >of around 10 to 16 inches and a 15-foot hypotenuse. Bob:......OK, I see that. Bob:>> 2. This device on the tower's stern would seriously impair >> maneuverability: you wouldn't be able to turn as needed because the >> harness would tend to keep you aligned to the towed boat. Harold:>2. Seems to me to be the opposite. I have to admit that I gave this little >thought before writing my original question, but what I saw as a possible >*big* advantage would be the elimination of catching the tow rope on the >rudder or stern. Even with rudderless Greenland-style kayaks I've had >problems with the line (even when anchored to the middle of my back) hooking >on one side or the other of the upturned stern. This gives the towed boat a >7-foot lever arm to turn you off course when it drifts to the side opposite >the rope. If the towline was connected to a ring which could slide freely on >a bridle beneath the hull, an off-center pull would slide the ring to the >same side and transfer the pull to both sides of the kayak, inline with a >point somewhere between the two attachment points, just behind the cockpit. >Am I missing something here? .....It's a very appealing thought to avoid snagging the tow line on the stern. I recently experienced (was responsible for) just such a problem which resulted in a dangerous situation. Happily, the worst of it turned out to be my embarrassment, but it could have been nasty for my towees (there were two hooked up together in a training exercise that nearly went very wrong). I can see that attaching the system close to the cockpit might avoid the alignment problem, but the system seems -- at least as I imagine it at this point -- pretty cumbersome. Seems to me that when a tow becomes necessary, one would want to hook up and get going ASAP. But, as I envisage it, you'd have to rig it before you could hook up to the towee. Bob:>> 3. How would you disconnect quickly in an emergency (say, a capsize)? Harold:>3. Connect the bridle line through two jam cleats, one on each side, near >the gunnel and maybe six inches behind the cockpit. To release, pull either >end of the line out of its cleat and let go of the rope, the rope would trail >behind the boat and let the ring and towline slip free. IF you had nothing >on your rear deck that would foul the system, you could rig the bridle and >ring on top of the deck and leave it there for a short tow or tow in mild >conditions when hooking the rudder/stern is no problem. When needed, undo >one end of the bridle and pass it beneath the boat, hand-to-hand, thread it >through the ring and run the free end through its cleat. The bridle would be >length-adjustable using the cleats, but would probably be happy if long >enough that the loop would reach back about halfway to the stern. Bob:....The disconnect would work well (although you'd want to have a small supply of spare slip rings handy). Threading the bridle under the boat gets back to my previous suggestion that the system might be a bit clumsy in a situation when you want to hook up to someone in a hurry. And do you think the procedure would be practical in rough conditions? On another point: if you make the bridle fairly long, say halfway to the stern, then I believe you run into that alignment problem, although it would indeed by mitigated by the slip ring. For reasons of speed and maneuverability, I think it would be preferable to learn how to free the tow line from one's stern, and to learn that it's necessary to check the line at frequent intervals. Given my recent experience, I've practiced this and find little hardship in it. >Comments anyone? Like I said above, I'm just thinking out loud here, but it >seems that there would be some real advantages unless you were using a kayak >with an adjustable skeg and wished to deploy it during the tow *or* had a >boat with a keel line with a very deep skeg at the stern. .....Indeed, many boats have these things. To work through the problems inherent in towing and rescues in general *well in advance of actual need* is the best way to ensure that they will succeed. Surely the fouling of the tow line is a serious potential problem and a workable mechanical solution would be very welcome. But the mechanics are not the only factors we need to consider. I believe that rescue procedures and equipment solutions should be conceptualized in the context of the conditions under which they are likely to be needed. This must include rough conditions in which the rescuer's abilities and stability may be compromised. Accordingly, towing systems must be easy to deploy, easy to attach, and easy to escape. Bob Volin bobvolin_at_bestweb.net ;-> There cannot be a crisis this week; my schedule is already full. *************************************************************************** PaddleWise Paddling Mailing List Submissions: paddlewise_at_lists.intelenet.net Subscriptions: paddlewise-request_at_lists.intelenet.net Website: http://www.paddlewise.net/ ***************************************************************************Received on Tue Sep 14 1999 - 21:29:43 PDT
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