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  1. #1
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    Default Here we go the design has started.

    A few topics ago i mentioned about a massive model.

    Well I am going ahead with the build.

    I wont disclose the size yet but its going to be big. I will keep you all up to date with the progress through out the build.



    Engine wise I am looking at one of these to power it.



    http://www.leavesleyaviation.com/mod...jets/wren/wren _turboprop.jpg



    Its a scaled down real working jet engine which powers a propeller.



    Just in a matter of interest why do all small hovercraft have ducted fans? Massive versions like the srn4 and above have open propellers ie the SRN6



    http://cache.viewimages.com/xc/30643...?v=1&c=ViewIma ges&k=2&d=32F168F2F013CA9A56A48428C7CBFC85A55A1E4F 32 AD3138



    But newer versions like the AA188 has ducts.



    http://www.jameshovercraft.co.uk/hov...large/ap1_at_s ea.JPG



    Can anybody explain this?




  2. #2
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    Default Re: Here we go the design has started.

    Have you played with jet engines before?

    They lag a bit between opening throttle and it actually spooling up.

  3. #3
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    Default Re: Here we go the design has started.

    The scale test models used in the development of larger hovercraft were done for a reason; skirt design, scaling weight and handling.



    From your powerplant selection I assume that recreating the sound of the craft will be part of the re-creation or illusion. This is something the test models did not even do, just another problem to overcome.



    The universal awe which the guy who built a scale working Ferrari got is akin to what you are thinking about doing. He spent 20,000 hours on his project, good luck.



    Link:

    http://www.youtube.com/watch?v=fbcQdjf6qRw




  4. #4
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    Default Re: Here we go the design has started.

    Hi

    This model is going to be rather extreme, especially in size and power.



    Yes I have owned many jet engines in the past, I have even built one years ago from a truck turbocharger.



    I am working to keep the craft to a size of 10ft long because any bigger it wont fit in my study.

    Engine wise I am hoping to probably use 2 gas turbine engines. one being a turboprop to power the propeller and the other to power a lift fan.

    I suppose you could ride on it but i am keeping the hull design light so you could put your feet through the floor and wreck it.

    Plus I wouldn't want to get to close to a 21 inch prop spinning at full power.





    The only people who will ride in it are my action men and a video camera.



    As for design so far the lower part of the hull is my own design but I have not yet decided on the upper part and layout.



    So far I do like the look of the SRN6



    http://www.simplonpc.co.uk/Hovertravel/SRN6-02.jpg



    Any ideas?

  5. #5
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    Default Re: Here we go the design has started.

    hold on...do you really mean 10 feet?? that's pretty big. especially for inside of a study! for that size though, surely 21 inch prop is too small?

    What about using the air from the jet exhsut to lift it (need a heat exchanger though!)

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    Default Re: Here we go the design has started.

    this has got to be a wind up

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    Default Re: Here we go the design has started.

    surely it has, why would anyone in their right mind want to build a 10ft long radio control hovercraft for his action man? this guy is either a certified window licker or taking the micheal!

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    Default Re: Here we go the design has started.

    This is no wind up.

    This model is going to be the real deal.

    As for the 21 inch prop. Depending on jet engine but will probably have 2.

    Acton men are the best for using in large scale modeling.

    If you think I'm crazy building such a model have a look at these.



    http://www.mark-1-tank.co.uk/jpgs/tiger-1-3030b.jpg



    http://www.thirtythousandfeet.com/gi...thumb01-00.jpg



    http://www.hpibajaforum.com/Kids/Sha...aleLegends.JPG

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