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Thread: How can this work? and well?

  1. #1
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    Default How can this work? and well?

    I have notised these funny configured craft this year.



    It would apear that several of the skirts have been left out of the design and the craft still works well if not better than last years craft.



    How is this possible, I know that when I lost several of my rear segments the craft still worked but not that great, kinda draged the back around a bit except when going flatout.



    Would the craft not loose all its lift like that, I do not know.



    Please explain...............

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    Default Re: How can this work? and well?

    possibly you may get the full answer but after the worlds.... basically keeps it fast and flat on the deck...

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    Default Re: How can this work? and well?

    the top F1's are generating enough lift air to sacrifice some through the hole at the back and still have a rock solid skirt



    i understand the idea is to have air passing above and below the craft when it tries to become airbourne rather than the craft suddenly becoming like an open barn door in the wind - the hole is an escape route



    and it works, they are definatley more stable at speed which was the designers intention i believe - nice one Conrad

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    Default Re: How can this work? and well?

    thinkin about the fluid dynamics of this, it may

    have the effect of keeping the craft on the deck!



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    Default Re: How can this work? and well?

    All true, but then why not just............



    You know that is, now that I think about it, realy clever, you see the way that there are like paddles sticking out the back that will also protect the rudder when vertical and still letting air through the hole in the middle.



    But again, this all goes against the principals of hovercraft, this being the faster you go the more lift you need.



    So it would also be possible then to chuck in a small lift engine as the craft uses mainly the ground efect theory most of the time and will then only need the lift engin at lower speeds and thus not need as big a one. Thus inproving power to weight.



    Its great to see pioneers out there taking the sport into the future with gusto.



    Wonder what will be next.

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    Default Re: How can this work? and well?

    now your talking rollocks!

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    Default Re: How can this work? and well?

    Rollocks



    Y?

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    Default Re: How can this work? and well?

    quote



    So it would also be possible then to chuck in a small lift engine as the craft uses mainly the ground efect theory most of the time and will then only need the lift engin at lower speeds and thus not need as big a one. Thus inproving power to weight.



    thats rollocks



    im guessing its more to do with good old mr Bernoulli. and his very interesting principles of fluid dynamics!"



    if you look at the pic of the pintail bottom, there looks like a bag loop around the outer periphery of the hull bottom, before the planning surface goes up.

    there are also high pressure segements on the craft, you can see the flaps.

    the lift is provided by the high pressure loop of air trapped between this bag loop and the segment. around the front and sides of the craft.

    there therefore is an area under the craft where the lift air would travel into.

    this is then a compartmented cushion.



    if there is a hole at the back, which is a small hole (as it is compared to the width of the craft) the air exits this hole and takes the air with it, thats in the inner middle 'compartment'. suppose its a bit of venturi and bernoulli, maybe the air is decreased in pressure a litte due to a velocity increase in the middle compartment, as it moves forward and air travels out the back at speed.

    this would have the effect of sucking the craft down to the deck as it moved forward at speed. would make for a very fast and stable craft.



    so yeh nice one conrad!



    if im right do i get a free skirt seggy? LOL

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