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#11
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On Aug 18, 1:46*pm, hk wrote:
The proper advice is to advise O'Hara not make the trip in his Tolman. It's just too risky, especially for a guy that whatever his sailboating experience seems really limited on open ocean powerboat experience. Because I don't talk out of my ass, I know about wood/composite construction and flotation, that's what I will talk about. Folks just need to know that your info is often scewed by, who knows what? Often times either googled, or worse, wiki, then taken out of context or edited, or just plain bull**** all together, just to fight. Your constant mocking and trolling keeps many good folks from posting here. |
#12
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On Aug 18, 1:21 pm, wrote:
On Aug 18, 12:29 pm, wrote: On Aug 18, 12:15 pm, wrote: On Aug 18, 11:46 am, wrote: I want to decide whether or not to install self bailing on my Tolman to go offshore. From what I can see, self bailing is installed on boats with sealed decks with the scuppers roughly 3" above the deck. My boat has no deck because I think it is important to have access to the hull at all times. My current floatation is from two compartments with screw on covers at bow and stern. I can even get into them if necessary. This lack of deck means that any scuppers would be far above the bottom of the boat and would not drain much water. Instead, I rely on the inherent dryness of the boat (very high bow and sides) and the completely sealed dry well in front of the motor and a large 3500 gph pump just in case. From my reading, I see that scuppers seem to cause a lot of problems too. However, one web site stated flatly that any boat going offshore had to have self bailing. So, thoughts? It would be pointless to install scuppers on your boat. And 3500 gph is under extremely ideal conditions. Best figure that your real world results would be about half that. That's about 30 gpm. If you take multiple hits, no bilge pump is going to keep up. Make sure you travel in a group if you're going offshore in a boat not really suited to be offshore. It's not that you can't make the trip successfully given the correct conditions. It's that many combinations of things can rapidly overwhelm you. Simply encountering a small storm and then having the engine quit can be more than your boat can handle. I do have a 9.8 hp pull start kicker too. BTW, I currently do not have a cover for my boat and last week I left the plug in her and she filled with rainwater to the height of the stringers (8"). I used my small pump (750 gal/hr) to pump her out and it took 5 min. The same thing with the 3500 gph should therefor take about 65 sec. I am installing the 3500 with asmooth hose instead of the corrugated stuff so it may be even faster.- Hide quoted text - - Show quoted text - You don't understand. You don't get 5 minutes between waves. You don't even get 30 seconds. If you lose engine power is a squall and can't keep the bow into the waves then you're in big trouble. If you start taking waves over the side or transom then in very short order you'e going to be swamped. Each wave is going to lower your boat so that the next wave dumps in even more water. We talking just a handful of waves before you are swamped. Your kicker will not be strong enough in storm. The wind and waves will overwhelm a 9.8 hp motor. Maybe it clears up fast and you still have enough battery power to pump it out. The battery will die fast once salt water gets to it. Bottom line you need to have someone around that can pick you up if the worst happens. This is a homebuilt? Do you know that your floatation will keep the boat afloat when swamped? How did you calculate the flotation? Have you tested it? Or do you just "think" it's enough? Take it out into a couple feet of water some place with a sandy bottom and where you can get a rope to a tow vehicle on shore then sink it. See what happens. If it sinks to the bottom just drag it towards the shore until you can pump it out. I have built smaller boats and tried various forms of floatation. Great Stuff is not so great for boats. It actually absorbs water. It also sticks to everything. A better thing to do is packing peanuts contained in bags. The foam must be removable in order to be able to inspect the hull. I will put the closed cell foam blocks into mesh bags inside the float compartments. I calculated the floatation based on weight of the boat (estimated at 800 lbs) plus the weight of the two motors and doubled that. BTW, the hull has positive buoyancy anyway. I have looked at commercially available scuppers and they seem to be a joke. A 1.5" hole with a strainer that covers up 30% at least? This is s'posed to empty your boat in less than 90 secs, not likely, even with two of them as most "offshore" boats have will not do it in less than 5 minutes. A bilge pump really is faster. The only scupper worthwhile would seem to be very large but unless I had a deck they would be useless. I have seen very few "offshore" boats with such huge scuppers. My transom is very high as are the sides. Compared to most other boats drifting with no power, I am much better off, even compared to most "offshore boats" because I have so much more reserve than they do. I also intend to buy a drift anchor just in case both engines die to keep her head into the wind. Can a 9.8 hp keep her pointed into the wind in a storm, the answer seems to be "yes". My 8000 lb sailboat with much greater windage came with only a 6.5 hp diesel that had no problem keeping the head into the wind in several thunderstorms. |
#13
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On Aug 18, 1:56*pm, wrote:
On Aug 18, 1:21 pm, wrote: On Aug 18, 12:29 pm, wrote: On Aug 18, 12:15 pm, wrote: On Aug 18, 11:46 am, wrote: I want to decide whether or not to install self bailing on my Tolman to go offshore. *From what I can see, self bailing is installed on boats with sealed decks with the scuppers roughly 3" above the deck. My boat has no deck because I think it is important to have access to the hull at all times. *My current floatation is from two compartments with screw on covers at bow and stern. *I can even get into them if necessary. *This lack of deck means that any scuppers would be far above the bottom of the boat and would not drain much water. *Instead, I rely on the inherent dryness of the boat (very high bow and sides) and the completely sealed dry well in front of the motor and a large 3500 gph pump just in case. *From my reading, I see that scuppers seem to cause a lot of problems too. *However, one web site stated flatly that any boat going offshore had to have self bailing. *So, thoughts? It would be pointless to install scuppers on your boat. *And 3500 gph is under extremely ideal conditions. *Best figure that your real world results would be about half that. *That's about 30 gpm. *If you take multiple hits, no bilge pump is going to keep up. *Make sure you travel in a group if you're going offshore in a boat not really suited to be offshore. *It's not that you can't make the trip successfully given the correct conditions. *It's that many combinations of things can rapidly overwhelm you. *Simply encountering a small storm and then having the engine quit can be more than your boat can handle. I do have a 9.8 hp pull start kicker too. BTW, I currently do not have a cover for my boat and last week I left the plug in her and she filled with rainwater to the height of the stringers (8"). *I used my small pump (750 gal/hr) to pump her out and it took 5 min. *The same thing with the 3500 gph should therefor take about 65 sec. *I am installing the 3500 with asmooth hose instead of the corrugated stuff so it may be even faster.- Hide quoted text - - Show quoted text - You don't understand. *You don't get 5 minutes between waves. *You don't even get 30 seconds. *If you lose engine power is a squall and can't keep the bow into the waves then you're in big trouble. *If you start taking waves over the side or transom then in very short order you'e going to be swamped. *Each wave is going to lower your boat so that the next wave dumps in even more water. *We talking just a handful of waves before you are swamped. *Your kicker will not be strong enough in storm. *The wind and waves will overwhelm a 9.8 hp motor. *Maybe it clears up fast and you still have enough battery power to pump it out. *The battery will die fast once salt water gets to it. Bottom line you need to have someone around that can pick you up if the worst happens. This is a homebuilt? *Do you know that your floatation will keep the boat afloat when swamped? *How did you calculate the flotation? *Have you tested it? *Or do you just "think" it's enough? *Take it out into a couple feet of water some place with a sandy bottom and where you can get a rope to a tow vehicle on shore then sink it. *See what happens. *If it sinks to the bottom just drag it towards the shore until you can pump it out. I have built smaller boats and tried various forms of floatation. Great Stuff is not so great for boats. *It actually absorbs water. *It also sticks to everything. *A better thing to do is packing peanuts contained in bags. *The foam must be removable in order to be able to inspect the hull. *I will put the closed cell foam blocks into mesh bags inside the float compartments. I calculated the floatation based on weight of the boat (estimated at 800 lbs) plus the weight of the two motors and doubled that. *BTW, the hull has positive buoyancy anyway. I have looked at commercially available scuppers and they seem to be a joke. *A 1.5" hole with a strainer that covers up 30% at least? *This is s'posed to empty your boat in less than 90 secs, not likely, even with two of them as most "offshore" boats have will not do it in less than 5 minutes. *A bilge pump really is faster. *The only scupper worthwhile would seem to be very large but unless I had a deck they would be useless. *I have seen very few "offshore" boats with such huge scuppers. My transom is very high as are the sides. *Compared to most other boats drifting with no power, I am much better off, even compared to most "offshore boats" because I have so much more reserve than they do. I also intend to buy a drift anchor just in case both engines die to keep her head into the wind. Can a 9.8 hp keep her pointed into the wind in a storm, the answer seems to be "yes". *My 8000 lb sailboat with much greater windage came with only a 6.5 hp diesel that had no problem keeping the head into the wind in several thunderstorms.- Hide quoted text - - Show quoted text - If you do this alone then you place little value on your life. It's just that simple. |
#14
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#15
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#16
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On Aug 18, 2:50 pm, hk wrote:
wrote: On Aug 18, 1:46 pm, hk wrote: The proper advice is to advise O'Hara not make the trip in his Tolman. It's just too risky, especially for a guy that whatever his sailboating experience seems really limited on open ocean powerboat experience. Because I don't talk out of my ass, I know about wood/composite construction and flotation, that's what I will talk about. Folks just need to know that your info is often scewed by, who knows what? Often times either googled, or worse, wiki, then taken out of context or edited, or just plain bull**** all together, just to fight. Your constant mocking and trolling keeps many good folks from posting here. Once again, I point out you have little or no experience building ocean-capable boats or operating same. No experience means no experience. You build dinghies and rowboats, none of which I would take into the ocean, and most of which I would not take into Long Island Sound.. Further, the other day you vehemently denied that Tolman skiffs incorporated stitch and glue construction, an opinion shot to hell by Renn Tolman himself, the designer of these boats. Finally, you have a cavalier attitude towards the value of life, as evidenced by your allowing, even encouraging, your minor child's participation in motorcycle racing. What O'Hara does is his decision. He has been asking for advice that relates to his personal safety in undertaking a 50-mile ocean voyage in a very light, small boat. Reasonable posters with ocean experience have advised against him making the trip in that boat. -- I am only one, but I am one. I cannot do everything, but I can do something. And because I cannot do everything, I will not refuse to do the something that I can do. What I can do, I should do. And what I should do, by the grace of God, I will do. — Edward Everett Hale (1822-1909) Look guys, this is all in fun. Sure, I'd like to do this but I do value my life. Maybe I will if I can convince myself that I need some more adventure but maybe not too. Wouldnt any of you even be tempted to try this? |
#17
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#18
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On Aug 18, 3:17 pm, hk wrote:
wrote: On Aug 18, 2:50 pm, hk wrote: wrote: On Aug 18, 1:46 pm, hk wrote: The proper advice is to advise O'Hara not make the trip in his Tolman. |
#19
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On Aug 18, 3:17*pm, hk wrote:
wrote: On Aug 18, 2:50 pm, hk wrote: wrote: On Aug 18, 1:46 pm, hk wrote: The proper advice is to advise O'Hara not make the trip in his Tolman. |
#20
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On Mon, 18 Aug 2008 12:11:06 -0700 (PDT),
wrote: Look guys, this is all in fun. Sure, I'd like to do this but I do value my life. Maybe I will if I can convince myself that I need some more adventure but maybe not too. Wouldnt any of you even be tempted to try this? Only with a deck, good scuppers and flotation, in a flotilla, on the right day. --Vic |
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