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Top heavy?
I've got an old boat very much like this one:
http://www.warnersdock.com/images/Fr...fores15yel.JPG that I'm trying to make into a mini-houseboat, sort of like a camper. I only expect to have about 200-300 pounds in the roof and walls, and the roof will only be about 48" above the gunwale. The hull will weigh a *lot* more than what is added, so shouldn't that alone be enough to keep it from being top heavy and flipping over? If I add weight, like a couple hundred pound bags of sand down in the hull to counterballance, shouldn't that take care of it? If so, should they be placed on the sides, or in the center? |
Top heavy?
On Jul 3, 11:34*am, David dh@. wrote:
I've got an old boat very much like this one: http://www.warnersdock.com/images/Fr...fores15yel.JPG that I'm trying to make into a mini-houseboat, sort of like a camper. I only expect to have about 200-300 pounds in the roof and walls, and the roof will only be about 48" above the gunwale. The hull will weigh a *lot* more than what is added, so shouldn't that alone be enough to keep it from being top heavy and flipping over? If I add weight, like a couple hundred pound bags of sand down in the hull to counterballance, shouldn't that take care of it? If so, should they be placed on the sides, or in the center? This is a bad idea on several levels. Even if you can make the math seem to work, the hull is designed to sit at a certain level in the water so as to be safe during all aspects of operation while cruising or in emergency conditions. Pitch a tent up there, or get a different boat. It's like pulling a trailer that is too heavy for the vehicle. The vehicle might get it rolling, but in an emergency can't react the way you want it to, or the way it was designed.. You might get away with it for years, but it could also get you killed in seconds. In a nutshell, you have the wrong tool for the job. Change your plan, or get a different boat... Just my opinion, but I am always against modifying a tried and tested design.. Scotty SmallBoats.com |
Top heavy?
On Thu, 03 Jul 2008 14:34:39 -0100, David dh@. wrote:
I've got an old boat very much like this one: http://www.warnersdock.com/images/Fr...fores15yel.JPG that I'm trying to make into a mini-houseboat, sort of like a camper. I only expect to have about 200-300 pounds in the roof and walls, and the roof will only be about 48" above the gunwale. The hull will weigh a *lot* more than what is added, so shouldn't that alone be enough to keep it from being top heavy and flipping over? If I add weight, like a couple hundred pound bags of sand down in the hull to counterballance, shouldn't that take care of it? If so, should they be placed on the sides, or in the center? That hull doesn't weigh as much as you think it does. Plus, it's essentially flat which, while counter-intuitive, makes it less stable. Alll boats and ships obey two laws of physics - center of buoyancy (CB) which is the center of the underwater volume of the vessel and center of gravity (CG) which is where all the mass would be concentrated if it had to be compressed to a single point. To float properly on the design waterline, then the CG must be in line vertically with the CB. Once you start messing around with CG (which is essentially what you are doing), it throws off the CB (because they are interrelated) and you are constantly playing catch-up to keep it properly oriented (dry side up and wet side down). Even adding 300 pounds isn't going to affect anything much because your CB, which is not a constant and can change depending on any number of factors, is out of whack. Additionally, you have to worry about beam - it ain't got none to speak of. You can figure it all out if you really want to. http://www.johnsboatstuff.com/Articles/estimati.htm Good luck. |
Top heavy?
On Jul 3, 4:23*pm, Gogarty wrote:
In article , says... On Jul 3, 11:34*am, David dh@. wrote: I've got an old boat very much like this one: http://www.warnersdock.com/images/Fr...fores15yel.JPG that I'm trying to make into a mini-houseboat, sort of like a camper. I only expect to have about 200-300 pounds in the roof and walls, and the roof will only be about 48" above the gunwale. The hull will weigh a *lot* more than what is added, so shouldn't that alone be enough to keep it from being top heavy and flipping over? If I add weight, like a couple hundred pound bags of sand down in the hull to counterballance, shouldn't that take care of it? If so, should they be placed on the sides, or in the center? This is a bad idea on several levels. Even if you can make the math seem to work, the hull is designed to sit at a certain level in the water so as to be safe during all aspects of operation while cruising or in emergency conditions. Pitch a tent up there, or get a different boat. It's like pulling a trailer that is too heavy for the vehicle. The vehicle might get it rolling, but in an emergency can't react the way you want it to, or the way it was designed.. You might get away with it for years, but it could also get you killed in seconds. In a nutshell, you have the wrong tool for the job. Change your plan, or get a different boat... Just my opinion, but I am always against modifying a tried and tested design.. Scotty SmallBoats.com It's not the weight. It's the moment.- Hide quoted text - - Show quoted text - I have programs here that will calculate any of it, but I was trying to keep it simple for a layman.. At the same time, a note to the OP... I defer to Eisboch in this case. He has much more experience than I in this area... I have booklearnin' he has boats;) |
Top heavy?
On Thu, 3 Jul 2008 16:30:25 -0400, "Eisboch" wrote:
"Gogarty" wrote in message ... In article , says... On Jul 3, 11:34 am, David dh@. wrote: I've got an old boat very much like this one: http://www.warnersdock.com/images/Fr...fores15yel.JPG that I'm trying to make into a mini-houseboat, sort of like a camper. I only expect to have about 200-300 pounds in the roof and walls, and the roof will only be about 48" above the gunwale. The hull will weigh a *lot* more than what is added, so shouldn't that alone be enough to keep it from being top heavy and flipping over? If I add weight, like a couple hundred pound bags of sand down in the hull to counterballance, shouldn't that take care of it? If so, should they be placed on the sides, or in the center? This is a bad idea on several levels. Even if you can make the math seem to work, the hull is designed to sit at a certain level in the water so as to be safe during all aspects of operation while cruising or in emergency conditions. Pitch a tent up there, or get a different boat. It's like pulling a trailer that is too heavy for the vehicle. The vehicle might get it rolling, but in an emergency can't react the way you want it to, or the way it was designed.. You might get away with it for years, but it could also get you killed in seconds. In a nutshell, you have the wrong tool for the job. Change your plan, or get a different boat... Just my opinion, but I am always against modifying a tried and tested design.. Scotty SmallBoats.com It's not the weight. It's the moment. I think it all depends on how the OP intends to use his "houseboat". 3-4 footers in the ocean? No way. A lazy, small lake somewhere? Go for it. Eisboch It is on a lake. I wouldn't try it in the ocean. It's not as wide as the houseboats around here, but it's not as tall either so I'm hoping it will sort of balance out and be about the same thing. And when I think about the cruisers in the ocean, with a flybridge, and then a flybridge on top of the flybridge, and sometimes a flybridge on top of the flybridge on top of the flybridge...how does all that work? |
Top heavy?
wrote in message ... I have programs here that will calculate any of it, but I was trying to keep it simple for a layman.. At the same time, a note to the OP... I defer to Eisboch in this case. He has much more experience than I in this area... I have booklearnin' he has boats;) -------------------------------- I have absolutely *no* experience in converting a small lake boat into a houseboat. Eisboch |
Top heavy?
Did I miss something here It's a POS sink it.
David wrote: I've got an old boat very much like this one: http://www.warnersdock.com/images/Fr...fores15yel.JPG that I'm trying to make into a mini-houseboat, sort of like a camper. I only expect to have about 200-300 pounds in the roof and walls, and the roof will only be about 48" above the gunwale. The hull will weigh a *lot* more than what is added, so shouldn't that alone be enough to keep it from being top heavy and flipping over? If I add weight, like a couple hundred pound bags of sand down in the hull to counterballance, shouldn't that take care of it? If so, should they be placed on the sides, or in the center? |
Top heavy?
On Jul 3, 5:01*pm, "Eisboch" wrote:
wrote in message ... I have programs here that will calculate any of it, but I was trying to keep it simple for a layman.. *At the same time, a note to the OP... I defer to Eisboch in this case. He has much more experience than I in this area... I have booklearnin' he has boats;) -------------------------------- I have absolutely *no* experience in converting a small lake boat into a houseboat. Eisboch Yes, but you have probably been in boats that size, or similar configuration.... I have not.. |
Top heavy?
On Jul 3, 5:12*pm, "
wrote: Did I miss something here It's a POS *sink it. David wrote: I've got an old boat very much like this one: http://www.warnersdock.com/images/Fr...fores15yel.JPG that I'm trying to make into a mini-houseboat, sort of like a camper. I only expect to have about 200-300 pounds in the roof and walls, and the roof will only be about 48" above the gunwale. The hull will weigh a *lot* more than what is added, so shouldn't that alone be enough to keep it from being top heavy and flipping over? If I add weight, like a couple hundred pound bags of sand down in the hull to counterballance, shouldn't that take care of it? If so, should they be placed on the sides, or in the center?- Hide quoted text - - Show quoted text - Yes, you missed the first line which suggests that this is not his boat, but one with a similar hull configuration..His boat could be spotless for all we know... |
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