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Thread: Solid Skirt

  1. #17
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    Default Re: Solid Skirt

    fold the sides? the hull is fabricated as 1 piece, unless you design it to fold but then your just making it more complicated then it needs to be



    yes the overall length has been reduced to 8m aswell

  2. #18
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    Default Re: Solid Skirt

    the width you can tow depends on the towing vehicle, 2.3m is the max with a vehicle up to 3500kg, 2.55m with a vehicle over 3500kg.



    so if this is something you expecting to pull with a car, the limit is 2.3m

  3. #19
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    Default Re: Solid Skirt

    maybe the roads are wider in oz!

  4. #20
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    Default Re: Solid Skirt

    lol the max width for any road going 'thing' trailer, car, truck is 2.5m, over that you need wide load tags and an escort.



    I used to design semi trailers and custom earth moving equipment for years, we know the ADR's back-to-front.


  5. #21
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    Default Re: Solid Skirt

    I've spent some time tinkering around with the same concept.



    If the foam is soft enough to deform reasonably it also tears easily and does not wear well at all.



    The inclination is to protect the delicate foam by either coating it with rubber or a thin skirt fabric. Which gives you the worst of both material characteristics, and not complementary (in my opinion).



    One step I took was to try using a very heavy skirt fabric and learn how this new type of skirt might behave. I'll admit that it's a stretch to claim that a lightweight foam and skin together is exactly equal to a heavy skirt material, but I think if you take 1+1=2 or 2x1=2 the math is about the same.



    A heavy skirt is a disaster on a small craft, I would think scaling it up would be just more of the same X2. A foam skirt would "act" heavy, if you don't believe me pinch some foam and time the reaction time.



    As a sidebar, the US military (Bell Aerospace of Buffalo NY) in the early 1970's came up with several air cushion landing systems, one involved moving air though a cellular soft foam. Perhaps it's this combination which holds some if any promise.



    EDIT:

    General info..................

    http://ntrs.nasa.gov/archive/nasa/ca...sa.gov/1979001 7874_1979017874.pdf



    More info (porous high loss filler) - see pages 31 now called 44 of 189, and page 6 now called 21..............

    http://ntrs.nasa.gov/archive/nasa/ca...sa.gov/1982000 4192_1982004192.pdf




  6. #22
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    Default Re: Solid Skirt

    Quote Originally Posted by loud'n'proud


    but the idea of a light weight yet rather stiff skirt has been bounced around abit and we are looking into the idea.
    I bet it BOUNCES.



    There were/are several inner-tube high pressure (stiff) inflated rubber raft like skirts which have been tried on hovercraft. They have been high drag on water and high drag on anything but perfectly flat land.


  7. #23
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    Default Re: Solid Skirt

    we have our own coating that will protect the foam from wear so that isn't a problem. and still have all the same flexable traits as uncoated.



    On weight our skirt actually weighs less then a rubber one of the same size.



    anyway if you study some forms of maths 1+1=1 lol...



    we are very much interested in any ones comments here its all part of the research so keep them coming!




  8. #24
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    Default Re: Solid Skirt

    What about a giant block of sponge, maybe with a single layer of something durable on the bottom. Put lots of holes through it and pump air through them. There'll be a thin layer of air underneath the block keeping the craft afloat. Probbaly a lot of friction though.

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