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#41
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sponsons really work! (BS)
"Michael Daly" ) writes:
On 28-Aug-2003, (William R. Watt) wrote: there's *nothing* I haven't tried in 6 foot or higher waves. what millponds do you paddle in? 6 foot waves are for children. we get wakes on the canal higher than that. Still bull****ting, huh willy? what it says in the subject line Not to mention the wonderful bucket seat in the Ellesmere. a small concession to comfort. I did like the lower back support on some of the kayaks I tried. few had any above the hips. Long, narrow hulls don't roll in waves the way wide stable kayaks do. That's why deployed sponsons are a bad idea in rough conditions. Not rolling means more stability in rough conditions. hull stability comes from both length and beam. a long fast boat can be just as stable as a short beamy boat. older sailboats were long and narrow but heavy. moderns sailboats are light and beamy. the apddling and sailing boat I built with the sponsons on it is both narrow and short. no sponons, no renetry. Round bottom hulls have _no_ initial stability. If the shape doesn't change with angle of heel, there is no position that is more stable. This makes for a very tippy kayak = not safe. round bottom boats with sponsons above the waterline have both superior wave riding and plenty of reserve bouyancy. If you visit my website but leave off the "/top.htm" you get an indexed list of all the files some of which are in any HTML references. Scroll down to files bluecanuxx.yyy to see text and photos describing a boat I made by sawing completely round 55 gal blue plastic barrels in half and mounting sponsons on the gunwales and read about the stability tests. Hard chined kayaks typically have excellent secondary stability and are rock solid in the roughest conditions. That is what the eastern Canadian and Greenland Inuit used and they could have made their kayaks any way they wanted. you've fallen into the "traditional" trap. there's no indication they even imagined round bottom boats. let alone tried and descarded them. with little in the way of framing material to work with it was materials which shaped the boat as is the case with all native craft. I wasn't there either but I still have the better argument. Waves catch on chines before they catch on sponsons but how much difference that makes to very light displacement hulls like kayak I don't know. However, in longer kayaks the chines are also longer and more subject to wave action. Waves break when the length is 7 times the height. If the wave crests match the length of a 20 ft kayak they'll break at 3 ft approx. If the wave is cresting at one end of a 20 ft kayak and the wave trough is at the other end that's a 40 foot wave and it will break at 6 ft in height approx. In either case you should have got off the water before then. The worst boating situation is waves coming from more than one direction. You can fall right into a hole in the water. It has happened to me somewhat artificially in the 7.5 ft boat I have the sponsons on, caught between 2 ft powerboat wakes on a canal. The sides on the boat are 1 ft with a 4" draft leaving 9" of freeboard. The beam is 24" like a kayak (length 7.5 ft as mentioned). Boat didn't ship a drop. The boat sails in quite stong winds for its size in smaller waves. The key is to lower body weight (centre of gravity) which a kayak paddler cannot do sitting upright in a tiny cockpit. I can't see a kayak paddler riding out a storm sitting bolt upright in a narrow boat without sponsons unless he or she is really into rolling which I imagine would be exhausing. Better, I think to have a large cockpit you can lie down in. There have been kayaks, although homemade by boat desingers and not mass produced, in which one could recline, even sleep in overnight as Herreshoff did on his. V-bottoms track well with less weathercocking than round bottoms and are decently stable if the V is not to sharp. That means less fatigue and hence, more safety. fatigue = safety in boat design? that's a new argument. you rest when you get tired. that's safety no matter what boat you're in. I'm not sure about the V-bottom speed argument as round bottoms have least wetted surface per pound of displacement. That's just theory and I haven't any tank tests or computer simulations to support it. Stop trying to argue with kayakers about kayaks when you don't know anything about them. Stop trying to portray necessarily limited and subjective personal impression as fact. You seem to be arguing from a sea kayaking perspective using production boats (which are marketed on appearance as much as anything else). What's your experince with sponsons? I've used them with good results on two boats I've desinged and built for myself. -- ------------------------------------------------------------------------------ William R Watt National Capital FreeNet Ottawa's free community network homepage: www.ncf.ca/~ag384/top.htm warning: non-freenet email must have "notspam" in subject or it's returned |
#42
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sponsons really work! (BS)
John Fereira ) writes:
I went out on our local lake last year with a couple of friends on a day when there were some strong winds coming down the 40 mile long lake from the north. There were frequent 2-3' breaking waves. All three of us are experienced in and have practiced several different reentry techniques. We paddled about a mile out and decided to practice some re-entries. First we tried the "cowboy" rescue as described above. Even though my Outer Island is narrow (21"), has a very low rear deck, and a cockpit large enough to sit in before putting in my legs, I was unable to sucessfully get back in using a cowboy rescue after four attempts. was the problem, the narrow beam and cockpit? you have to push up right quick because the hull is least stable when you're sitting upright. perhaps its not a good technique for some people on those very narrow boats. I don't think I'd need to use a paddle brace but that's personal. After the fourth time capsizing before *almost* getting back into the cockpit, I grabbed my paddle float and was back in the cockpit in less than 30 seconds. Only one of the three of us managed to reenter his kayak and stay upright using a cowboy rescue that day. On flatter water all of us have sucessfully used a cowboy rescue to reenter many, many times. Usually, however, if we have capsized we just roll up or use and assisted eskimo rescue off a paddling partners bow. That's the way the easter Canadians, Greenlanders, Aluets, and Innuit have been doing it for generations. I guess you've never had any alligator wresting experience, there, sonny. I don't see you listed with the WRWF (World Reptile Wrestling Federation). "Cowboy"? What "cowboy"" What do dry dirty dusty cowboys know about getting back into boats they've fallen out of? Ever done any log rolling? I've never paddled around Iceland, and God only knows why anybody would want to. I'll bet even teh native don't do it any more, unless maybe offered large sums of money by tourists. Climbing in over the rear deck worked for me. It wasn't even a challenge. Maybe its all the swimming and water polo and getting in and out of the pool. I can understand why you'd want to go in a group of like-minded people (???) where you paddle but I'm strictly a solo paddler on the lakes and rivers of Ontario where waves and cold water are not unkown. In one of my less rational moments I did go out in a parka in December to see what it was like. I rely on myself to re-enter any boat I might fall out of. I don't know what experinece you've had with sponsons but I've found them usefull on two narrow boats, both of which had a 24" beam. Sponsons are used to avoid re-entry. -- ------------------------------------------------------------------------------ William R Watt National Capital FreeNet Ottawa's free community network homepage: www.ncf.ca/~ag384/top.htm warning: non-freenet email must have "notspam" in subject or it's returned |
#43
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sponsons really work! (BS)
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#44
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sponsons really work! (BS)
On 31-Aug-2003, "Michael Daly" wrote:
Then kindly explain why there are plenty of examples of Inuit and Aleut craft that _do_ have round bottoms. The Netsiligmeot kayaks were used on lakes and rivers and were round bottomed. Aleut baidarkas and kayaks like the King Island were round bottomed. However, the Eastern Arctic paddlers, who specialized in sea mammal hunting in rough conditions chose the hard chine. An apology here - I mixed up "round bottom" and "round chine" in these examples. The Baidarkas and such of the western Arctic are round chined, not round bottomed. As such they don't have the stability issues of a round bottomed kayak. However, the point I'm trying to make is that the Inuit and Aleut can and did make a wide variety of boats and were clearly in a position to choose their designs according to their needs, contrary to what Willy-boy contends. Mike |
#46
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sponsons really work! (BS)
"Michael Daly" ) writes:
Send him over and I'll put him to the test. Considering that you know next to nothing about kayaking, I fail to see how you're in a position to make any claims. as it happens I know as much about sponson on kayaks as anyone else who has posted in this thread, and considerably more about sponsons on other boats. you are all talking from no experience at all and no knowledge that I can discern. As far as I can tell I am THE ONLY person posting in this thread who has actually used sponsons. and I've just as much experience re-entering kayaks. my one re-entry on a demo boat being more than most posting in this thread have done. additionaly, OF COURSE THERE ARE NO SIX FOOT WAKES ON THE RIDEAU CANAL. Its amazing how gullible, or more likely so wrapped up in their own self-importance, some people can be not to recognize when someone is pulling their leg. if there were 6 ft wakes they would suck the sunbathers off the beach on Mooney's Bay into deep water and drown them like kittens, and drastically reduce the value of waterfront property. geessh, get a life. I'd like to make two observations. First, you complained that shoving a boat cushion under my hips to raise them and allow me to get them over the gunwale of my boat was inadvisable because the cushion might float away. yet you accept a kayka re-entry technique which depends on using a paddle float without question. I'd advise kayakers who are serious about re-entry to forget about re-entry aids and practice unaided re-entry until they can do it under any conditions with their eyes closed and one hand tied behind their back. That should meet your requirements. It meets mine. The other observation is I don't agree with the other poster that it's most likely that person would fall out of his or her kayak in rough water. Only a few fanatics would paddle in rough conditions and then only occasionally unless they have become obsessed with rough weather conditons and distain paddling in normal conditions. This applies especially to sea kayaking because surveys of ocean sailors have shown that offshore cruisers encounter winds of 12-15 mph most of the time. Its what makes ocean cruising such a popular activity. Nobody enjoys being tossed around riding out storms at sea. If you spend most of your time in good boating conditions then that's when you will fall out of your kayak most often, when you least expect it. Its a human thing, not a weather thing. I seldom go boating in rough weather and I've fallen out of boats more than I care to admit. I don't drink. Its that momentary lack of attention, the day dreaming from repetition and boredom that has done me in, not rough weather. This summer I saw one kayak paddle right over top of anther and the paddler fall out. There is no way he could have rolled out of that situtation. If you were to paddle onto a submerged log or other debris you too could not roll the boat. You'd just fall out. And as likely as not if startled, eg dive bombed by a seagull, the paddler would throw the paddle in the air landing out of reach and unavailable to assist in a re-entry. Nope, I'd work on that unassisted re-entry and not rely on the paddle. Now sponsons, they stay with the boat. I'd invest my safety dollar in a good set of sponsons and maybe go a bit slower from an occasional bit of drag on wavetops. What people really object to but won't admit is that sponsons don't make their sleek colourful boats look sexy. Sponsons just don't fit their self image as kayakers. Nothing to do with performance or safety. Everything to do with appearances. Bah. -- ------------------------------------------------------------------------------ William R Watt National Capital FreeNet Ottawa's free community network homepage: www.ncf.ca/~ag384/top.htm warning: non-freenet email must have "notspam" in subject or it's returned |
#47
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sponsons really work! (BS)
(William R. Watt) writes:
"Michael Daly" ) writes: Send him over and I'll put him to the test. Considering that you know next to nothing about kayaking, I fail to see how you're in a position to make any claims. as it happens I know as much about sponson on kayaks as anyone else who has posted in this thread, and considerably more about sponsons on other boats. you are all talking from no experience at all and no knowledge that I can discern. As far as I can tell I am THE ONLY person posting in this thread who has actually used sponsons. I've also never attached theatrical risers to the sides of my car, but I don't intend to try that, either. Y'ever hear of, "If it ain't broke, don't fix it"? Or maybe, "Not everybody has to try everything to know it's a bad idea"? -- :::::::::::::::::::::::::::::::::::::::::::::::::: :::::::::::::::::::::::: Mary Malmros Some days you're the windshield, Other days you're the bug. |
#48
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sponsons really work! (BS)
Mary Malmros wrote in
: John Fereira writes: (William R. Watt) wrote in [snipster] but I'm strictly a solo paddler on the lakes and rivers of Ontario where waves and cold water are not unkown. The lake that I am describing is only about an hour and half south of Lake Ontario. Heh...you'll appreciate this, John, since you're from my same latitude and only a short ways west. Every summer, me and my buds head _north_ to Ontario for the warm-water paddling on the Ottawa River. The section we paddle is controlled by a top-release dam, and it's considerably warmer than the Deerfield, which is bottom-release. It feels like bath-water to us! A friend of mine from Ithaca goes up there quite often as well. Have you met a guy named Matt Stevens? Moral to that story, latitude is just _one_ factor influencing water temperature...and often, not the most important one. There's a similar scenario not far from here. I've gone flyfishing a bunch of times on a couple of rivers in the Catskills. Both the east and west branch of the Delaware river are tailwater rivers (fed from the bottom of a dam). The west branch is fed from Cannonsville reserveroir all summer but the feed into the east branch from Pepacton reservoir is reduced significantly. As a result, the water temperature goes up and many of the fish in the east branch move into the west branch. |
#49
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sponsons really work! (BS)
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#50
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sponsons really work! (BS)
"Michael Daly" ) writes:
On 2-Sep-2003, (William R. Watt) wrote: as it happens I know as much about sponson on kayaks as anyone else who has posted in this thread, You know how much I know about sponsons? Really? When did you ever go paddling with me when I was checking out a kayak with sponsons? Yes, of course I know you know nothing sponsons, because if you did know anything about sponsons it would have been obvious in what you've written in this long rambling discussion. You've spent a few minutes of time in kayaks in your whole life! How much of that with sponsons? Get off yor high horse! I claim experince in a range of small boats makes a person capable of making accurate comparisons after 2-3 hours investigating a number of different kayak models. You experience may differ and you have no way of knowing what someone else tell about kayaks after trying a number of them. As I wrote earlier, you are writing from compatitively limited experience, It shows in what you contribute to the discussion. You also deomstrate a very competitive obsessive temperment, it that's any use to you. As far as I can tell I am THE ONLY person posting in this thread who has actually used sponsons. Probably because you haven't been paying attention to the others in these threads. You are not the only one and your experience with kayaks is trivial. and I've just as much experience re-entering kayaks. my one re-entry on a demo boat being more than most posting in this thread have done. One re-entry makes you an expert? "Expert" is not a word I would use for myself, and certainly not for you based on what you've written to date. That's your problem, willy-boy, you think you're an expert when you actually know nothing at all. Some of us practice re-entry techniques _frequently_ and even pay for pool time in the winter just to practice. I've practiced _many_ different techniques for re-entry, solo and assisted. That's why I _know_ you're full of ****. I'd like to make two observations. First, you complained that shoving a boat cushion under my hips to raise them and allow me to get them over the gunwale of my boat was inadvisable because the cushion might float away. yet you accept a kayka re-entry technique which depends on using a paddle float without question. No, that was Mary. You obviously don't know paddle float re-entry. In a standard paddle float re-entry, the paddle float is _attached_ to the paddle and the paddle to the kayak, so it isn't going to float away. Look up Sea Seats on the web. There are products sold for kayakers that do exactly what your seat cushion does, except that it's designed for rescue in rough conditions. I know kayakers who use them. I'd advise kayakers who are serious about re-entry to forget about re-entry aids and practice unaided re-entry until they can do it under any conditions with their eyes closed and one hand tied behind their back. That should meet your requirements. It meets mine. Which precludes the use of sponsons. No it does not. Sponsons, for those who have been reading this thread with any understanding at all, are intended to prevent capsize and subsequent re-entry. They are not a re-entry aid. This is exactly what some of us have been saying for a while. Too bad you don't pay attention. Yes I can re-enter a kayak and roll up with one hand tied behind my back. In fact I know several rolls that allow me to do that (butterfly roll, armpit roll, window shade roll, storm roll variation etc.) Only a few fanatics would paddle in rough conditions and then only occasionally unless they have become obsessed with rough weather conditons and distain paddling in normal conditions. Well this means a lot of us will stay home. The reason you want to paddle in rough conditions is because they happen a lot. Squalls on the Great Lakes come up fast - hell, even Lac des Chenes off Brittania Bay gets some good summer squalls. Yes but anyone with any boating experience can see themn comming from far enougth away to get to shore. At one of the evening demos I attended, in fact the one when I tried re-entering a kayak, the sales rep was concered about some thunder and lightning. She was reluctant to let me go out until I pointe out to her that the clouds were moving upriver, the cold front had passed, and the light and noise show was moving away, not toward us. Reading winds and weather patterns is basic to sailing. Its not an option for sailing like it is for paddling. Any paddler that spends their paddling time in calm water assuming that all will be well is setting themselves up for a disaster. Every paddler should be comfortable in rough conditions. Besides, that's when paddling gets to be fun. And when my hard chine kayak really behaves well. Yep, and you are writing according to personal prefernce, not mine which I see as more wide ranging, or that of the general paddling public. "Limited" is the word I used to describe your outlook and experience. If you spend most of your time in good boating conditions then that's when you will fall out of your kayak most often, when you least expect it. Years of sea kayaking under all conditions on the Great Lakes and oceans and no upsets unless I wanted to. Kayaks are _not_ that unstable. Your comments are based on ignorance. Are you claiming capsize and re-entry is a non-issue? Or just a non-issue yourself? Its a human thing, not a weather thing. I seldom go boating in rough weather and I've fallen out of boats more than I care to admit. You also brag about never taking lessons. Maybe if you learned something about boating, you'd fall out less. In many years of sailing, canoeing and kayaking, I've suffered no upsets in calm conditions. In fact the only upsets have been canoeing and kayaking in WW. If you were to paddle onto a submerged log or other debris you too could not roll the boat. You'd just fall out. I've paddled onto submerged and semi-submerged stuff (logs, rocks, ice etc) many times and never tipped. Falling out of kayaks is something that rarely happens. It would be straightforward to roll up under these conditions but you'd have to scull or brace in the upright condition until you gain full control. I've actually practiced these things. You, on the other hand, are full of ****. And as likely as not if startled, eg dive bombed by a seagull, the paddler would throw the paddle in the air landing out of reach and unavailable to assist in a re-entry. If birds startle you that much, stay home. Most of us don't let go of the paddle - it's trained into us. Besides, smart paddlers carry spares. Nope, I'd work on that unassisted re-entry and not rely on the paddle. Now sponsons, they stay with the boat. I'd invest my safety dollar in a good set of sponsons and maybe go a bit slower from an occasional bit of drag on wavetops. This is _not_ an unassisted re-entry. This is an assisted re-entry. Sponsons are used to assist paddlers back into the kayak. What people really object to but won't admit is that sponsons don't make their sleek colourful boats look sexy. Sponsons just don't fit their self image as kayakers. Nothing to do with performance or safety. Everything to do with appearances. Bah. You continue to ignore what folks have been saying about sponsons. 1) they don't work as well as some people claim. Other techniques are just as effective. 2) Sponsons are slower to deploy than paddle floats or other techniques. 3) Excess time in the water due to sponsons means greater threat of hypothermia. Paddlers who actually know what they're talking about rate rescue techniques with time-in-water as a critical criteria. 4) Sponsons provide limited stability improvements compared to claims. 5) Increasing the stability of a boat in rough conditions _increases_ the likelyhood of upset. Stability on flat water is instability on waves. 6) If broached on a breaking wave, sponsons _greatly_ increase the likelyhood of capsize. A narrow kayak can be edged into the wave and be more stable with a proper brace. 7) Sponsons, if deployed, significantly increase drag. Kayaks don't have enough freeboard to keep them above water. 8) Sponsons give people a false sense of security, leading them into conditions where they don't belong. Training and practice, not gear, is what is important. Agressivness like yours is what leads paddlers into coniditions where they don't belong, not safety mindedness. -- ------------------------------------------------------------------------------ William R Watt National Capital FreeNet Ottawa's free community network homepage: www.ncf.ca/~ag384/top.htm warning: non-freenet email must have "notspam" in subject or it's returned |
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