What happen to regular fiberglass on water?

Discussion in 'Materials' started by Shafri, Jan 18, 2011.

  1. Fanie
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    Fanie Fanie

    Hello Shafri,

    I would suggest you test some pieces before spending the big buck an a boat. Most guys do so they can become familiar and learn from the small then do the big.

    The glass in your picture is chopsrand. It is usually a less desirable material compared to woven which is a lot stronger. Personally I like polyester resin, but keep in mind you need to make pieces in one go or you can get delamination. This means you cannot build the hull over a week's span, if you start you must finish in one go.

    Sure a lot of guys failed, I have myself many times. So it is one reason why I test before I try and learn form other's experience here. Failing is expensive, following working advice is cheap.
     
  2. gonzo
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    gonzo Senior Member

    Some female molds are easy to build. For example, multichine hulls
     
  3. Landlubber
    Joined: Jun 2007
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    Landlubber Senior Member

    Shafri,

    Hey mate, what sort of boat do you want to build this time please, I may be able to get materials to you if you cannot get them where you are.

    We really need to be a bit more specific in your current project to be able to answer much more constructively for you. Ta, John
     
  4. PAR
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    PAR Yacht Designer/Builder

    Building a female mold for a one off is crazy. Continue you studies and research one off, single skin building methods.
     
  5. Shafri
    Joined: Oct 2010
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    Shafri Mechatrommer

    still the same boat in my mind as in my very first post http://www.boatdesign.net/forums/op...i-want-build-boat-intro-here-first-35289.html

    i came here with a big project, but with zero knowledge :p...
    i'm looking forward to supplier for fiberglass boat building material in bulk volume (roll, drum etc) the "boat design central" quotes prices for bottle, yard i think, gotta survey more option. but another thing to consider is the shipping cost, as i'm remotely located in far east malaysia, the shipping cost could be tremendous!

    so let me do some exercise based on PAR recommendation...

    one off fiberglass, there are two type, c-flex and sandwich/foam http://www.glen-l.com/methods/methdfg.html both required male mould and later application of fiberglass material on top the inverted male. since both using male mould, so exterior hull must be manually finished properly, sanded, putty'ed etc.

    my "crazy" proposal earlier is making a female mould right away, so thinking of gettting factory quality exterior finishing. so the step of making redundant male mould (the usual way to build female mould from) could be avoided. the proposal as in the rough sketching below.

    female mould.jpg

    just a 2cents.
     
  6. pistnbroke
    Joined: Jan 2009
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    pistnbroke I try

    I think you are taking the piss ....you cannot be that stupid that a few minuites research on the net will not let you know whats gong on .buy some resin and laminate a small project ...you will learn a lot in a morning .....perhaps your IQ is only 80....or you think ours is .....
     
  7. Shafri
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    Shafri Mechatrommer

    i think its you that taking a piss, or maybe you are too long in the sea that the mutation start to take over your head?
    are you the representative of the forum committe? or the exemplifier of the forum culture?
     
  8. PAR
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    PAR Yacht Designer/Builder

    Piston is in his way, trying to say what we all have been trying to say and that is, you are in way over your head and haven't a real idea of the tasks involved. There are more then 2 ways to make a one off single skin hull.

    Look Piston is right, buy a small amount of 'glass and resin, then see if you can make a one meter diameter ball. Make it smooth, fair and completely round. This will show you how much you actually need to learn and possibly some vision to the techniques and methods employed in the processes.
     
  9. Shafri
    Joined: Oct 2010
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    Shafri Mechatrommer

    yes PAR, a good advice, thanx. The same to pistn, but in not a good manner. i was just proposing something out of my head, is it too difficult than making a boat? instead of saying.. yes it can be done, or.. it cannot be done?

    is it too difficult to say... "There are more then 2 ways to make a one off single skin hull", or is it too difficult to provide a helpful link showing the other method other than the 2 described in FAO's link provided by Landlubber? or glen-l site. instead of saying an irrelevant IQ test.

    IMHO, pistn is not meant to be in place to teach the novices, he deserve in position with the bunches of sea masters up there wherever it is. If you dont care to teach, then you should simply shut up.
     
  10. PAR
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    PAR Yacht Designer/Builder

    The issues with a mold is you have to make the boat twice, once for the mold and the other when you actually lay it up. This is fine if you plan on popping several out of the mold, not so much for a one off.

    Attempting to gather the skills and information you need on line isn't going to be the most effective method. The most efficient method is personal research and hands on time with the materials and techniques. No amount of information in a book or online will show you how to feather a thickened mixture into a surrounding area. You can read all day, but you have to physically feel and touch much of it to truly understand.

    Attempting to invent a new method is shear lunacy, frankly. Without an understanding of the materials, techniques, engineering, methods, physical properties, etc. you can't possibly hope for much more then what's already been preformed by others.
     
  11. Fanie
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    Fanie Fanie

    Eh Safari,

    Anything is possible. You have to realize that if it was so quick and easy to just build a boat then every tom and harry with a swingin dcik would have an el cheapo boat in the yard they built one afternoon when they got bored, worth a LOT of money.

    I always say to anyone asking what must I do if I'm going to build a first boat and my advice is go see a luny doc - that is the first thing you must do. You have to be a bit off your rocker to just build boats, it is a big job and most people do not finish what they started. Let me put it another way. Very few people finish their boat project.

    Why - well, it takes lots of time, it is expensive, wife divorces, and all sorts of problems and technical problems.

    Other than that, there is no problem.

    If you think Piston is bad, wait till Richard gets here :D A harch and seemingly rude reply may not be a bad one, hopefully it will indicate the severity of the issue. A poor boat could get people killed / drowned, same as a home built car.

    Well, now that everyone stuffed you with the possibilities, do you plan to stick around a while and check some things out, maybe build a model first like Par suggested ? Worst you can do is visit the jokes thread... ;)




    PS. Ok so you have to drive off the bridge for the car to drown you... :rolleyes:
     
  12. hoytedow
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    hoytedow Fly on the Wall - Miss ddt yet?

    We all speak freely here, and may speak more frankly than you are used to. Don't take it too seriously. Piston knows a lot about a lot. Don't be put off by it.
     
  13. hoytedow
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    hoytedow Fly on the Wall - Miss ddt yet?

    Richard will keyboard kindly and un-ruffle your feathers.

    Seriously, frank talk is to make people think twice before getting someone drowned.
     
  14. gonzo
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    gonzo Senior Member

    There is no need to insult someone asking for and education.
    There are many designs for sale. I suggest you find one you like and then consider the different construction options. A mold has to be faired and polished to get a good finish on whatever you are laminating into it. It won't take any more time to fair and polish the hull. In other words, you are not saving time or materials.
     

  15. PAR
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    PAR Yacht Designer/Builder

    I'll second Hoyt here. Boats can place humans in an unnatural environment, farther from shore then your can safely swim back. In this regard it's just like flying in an airplane at 15,000 feet of riding an elevator up 10 stories.

    Given this, any minor problems can easily become life threatening, so the usual reaction is to tell someone they're in over their head and hire a professional. I tell my clients to ask themselves, if they were in an airplane at 15,000, would they have the same response to the question/desire/ DIY hopes as they do about the boat. More often then not, they'll trust the pilot or call a rocket scientist to help them out. Same deal here, except we're paid a lot less then the rocket scientists.
     
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