around in pocket, I I think so

Discussion in 'Projects & Proposals' started by WindRaf, Oct 2, 2014.

  1. WindRaf
    Joined: Oct 2014
    Posts: 343
    Likes: 5, Points: 0
    Location: Italy

    WindRaf Senior Member


    in theory it could also be made in wood
     
  2. Jamie Kennedy
    Joined: Jun 2015
    Posts: 541
    Likes: 10, Points: 0, Legacy Rep: 117
    Location: Saint John New Brunswick

    Jamie Kennedy Senior Member

    What happens when the fresh water is consumed? The water doesn't add stability, and as it is replaced with air this reduces stability. You could add some bulkheads or removeable containers so you can gradually replace the fresh water with other stores. Otherwise and also, you would not have much of a problem with free surface affect sideways in a narrow keel, but you will have a serious problem fore and aft, once only half full. Good design, just a missing detail you may already have thought of just left out of this drawing. Even just two our three bulkheads should do.
     
  3. Jamie Kennedy
    Joined: Jun 2015
    Posts: 541
    Likes: 10, Points: 0, Legacy Rep: 117
    Location: Saint John New Brunswick

    Jamie Kennedy Senior Member

    Yes, oak would be good, and you could store more wine. :)
     
  4. WindRaf
    Joined: Oct 2014
    Posts: 343
    Likes: 5, Points: 0
    Location: Italy

    WindRaf Senior Member

    the secret is traslate the wine,,,,:p
    no, the ballast is enaught for the stability even without fresh water...and in the long oceanic navigations often rains
     
  5. Jamie Kennedy
    Joined: Jun 2015
    Posts: 541
    Likes: 10, Points: 0, Legacy Rep: 117
    Location: Saint John New Brunswick

    Jamie Kennedy Senior Member

    The bulk food compartment looks like about 150 litres. Even dry food might only be 0.5 kg per litre or so, so 75kg maybe. This should do for 150 days perhaps. I think this should work as it is below the waterline as you say, and 150 days is enough for some good hops around the globe. I like it.
     
  6. Jamie Kennedy
    Joined: Jun 2015
    Posts: 541
    Likes: 10, Points: 0, Legacy Rep: 117
    Location: Saint John New Brunswick

    Jamie Kennedy Senior Member

    I agree that you can replenish the fresh water as it rains, but when it is half full it will slosh forward and aft, and shift forward going down waves. You may want a few bulkheads, and with a small pump you may have anyway you can shift it as needed. You could also consider less room for water and more ballast, but that can easily be tuned later with this design during sea trials. I do like it.
     
  7. WindRaf
    Joined: Oct 2014
    Posts: 343
    Likes: 5, Points: 0
    Location: Italy

    WindRaf Senior Member



    steel ten is designed to stay in the sea 8 month, no stop
     
  8. WindRaf
    Joined: Oct 2014
    Posts: 343
    Likes: 5, Points: 0
    Location: Italy

    WindRaf Senior Member

     
  9. TANSL
    Joined: Sep 2011
    Posts: 7,369
    Likes: 699, Points: 123, Legacy Rep: 300
    Location: Spain

    TANSL Senior Member

    Do you mean that each area having a different color is produced independently of the others ?.
    I do not intend to build the entire model with a single surface. According to your plans is very clear that will be needed at least 6 surfaces on each side.
    In any case, a cap as the bulb is very difficult to construct. If this really is just the cap would be preferable mortise the cap, not forging. Very complicated, right ?.
    And what about non-developable surfaces ?. Have you built a prototype, you have experience in its construction?
     
  10. Jamie Kennedy
    Joined: Jun 2015
    Posts: 541
    Likes: 10, Points: 0, Legacy Rep: 117
    Location: Saint John New Brunswick

    Jamie Kennedy Senior Member

    240 days might be a tough haul on 150 litres of dry food, but I think it is doable. I know I have about 50 pounds of fat I wouldn't mind losing, so I could sail on 1500 calories of food which is only about half a pound, or half a litre by volume. So 150 litres could get me 300 days, and losing a pound of fat per week would give me another 500 calories a day for 2000 total. Hey, if you burn more calories and start running out of food or getting too thin, you stop some place. Fishing would provide some entertainment and relief also. So I concur. Plus who knows you might have 200 litres there, or you can shift some of the less dense food and comfort items up higher. Thanks for the info.
     
  11. WindRaf
    Joined: Oct 2014
    Posts: 343
    Likes: 5, Points: 0
    Location: Italy

    WindRaf Senior Member


    Jamie, in steel ten is not a problem load 300 kg of spaghetti and 100 kg of tomato sauce :p
    Is this the reson 100 litres alcohol stove
    and the two burner stove

    steel ten pianta interni.png
     
  12. Westel
    Joined: May 2014
    Posts: 109
    Likes: 4, Points: 18, Legacy Rep: 43
    Location: Belgium

    Westel Senior Member

    240 days at sea non-stop ?

    I think you should read Gerry Spiess' , or other micro cruiser voyages books again.
    From where came that idea to do a non-stop circumnavigation in a 10 ft boat ?

    Doing stretches of 70-80 days might be "pushing human sanity" but more than 200 days in such a confined space is asking for trouble I guess.

    Serge Testa took more than his time to recover from each leg he did in his 12 footer and as far as I can remember, never got close to 100 days for his next harbor.
     
  13. sharpii2
    Joined: May 2004
    Posts: 2,246
    Likes: 329, Points: 83, Legacy Rep: 611
    Location: Michigan, USA

    sharpii2 Senior Member

    Baffles can be added to keep the water from sloshing fore and aft. The keel could also be divided into several smaller water tanks. That would be the best approach. If need be, each tank can be filled with sea water, after it's drained of fresh water.
     
  14. Jamie Kennedy
    Joined: Jun 2015
    Posts: 541
    Likes: 10, Points: 0, Legacy Rep: 117
    Location: Saint John New Brunswick

    Jamie Kennedy Senior Member

    I think whether to do it non-stop or with stops is not so much a design problem as a pre-design consideration. It would be very much a matter of personal choice. Certainly if you did decide to go non-stop it would make the design much much more difficult, but I think it is wrong to say it is wrong for someone to consider it. It would not be for me at this stage in my life, but if I was ever of a state of mind to become a hermit or an anchorite, I would probable rather do something like this instead. People have done such things in longer boats. I know I would have to do it in a boat where I could spend some time up outside of the boat, swimming, fishing, sailing, observing nature. I would also have to communicate with people. But other people are different and I expect they would do it differently. I think it is best to keep such a competition loose, so people are free to do whatever they may end up doing in their own way. For example I might do it with many stops, but westward so I can do some harder upwind sailing, which I enjoy. For that I might have to add a few feet. Not sure what the record is for shortest solo westward with stops. Lots of records out there. I like that fellow that went in an 80 foot schooner and finished the interior along the way. On a boat like that you could also bring spare masts and sailcloth and other materials to do repairs along the way. Not so much an option for 10 or 12 feet, but I think it is important to do meaningful things along the way besides the trip itself. Yrvind reads, which is a good thing to do. I like to write. I would also like to do it like Captain James Cook, losing no one to scurvy. ;-)
     

  15. sharpii2
    Joined: May 2004
    Posts: 2,246
    Likes: 329, Points: 83, Legacy Rep: 611
    Location: Michigan, USA

    sharpii2 Senior Member

    All of this is very true, but not in the plate thicknesses being considered. 2.0 mm plate will be a ***** to weld, as the heat from the weld will spread further from the joint, causing that steel to buckle and deform there.

    Steel sailboats generally are built in much larger sizes. Typically the smaller ones are in the 30 ft (9 m) range. Some smaller ones have been built, but they are very heavy for their size. 3.1 mm plate is a whole lot easier to weld and is over three times stiffer.

    The only problem is it is very heavy, about 5.2 lbs per sf (25.4 kg per m^2).

    Boats of thinner plate are probably best riveted together, just like smaller aluminum ones are. But that subtracts the major advantage of steel construction; the hull being a single piece unit.
     
Loading...
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.