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Thread: Screw-propelled vehicles

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    Jon
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    Screw-propelled vehicles

    Screw-propelled vehicles use auger-like cylinders for propulsion. The cylinders have a helical spiral flange, like a screw thread. The motion works like this:




    They were briefly desirable for vehicular propulsion over snow and extremely rough terrain. Because the screws were hollow, they could also be used as floats for amphibious vehicles.

    Fordson tractor converted into screw-propulsion:


    1926 Armstead Snow Motor vehicle:


    Chrysler developed the Marsh Screw Amphibian for the Vietnam War. It performed excellently through water and marshy terrain, but failed on firmer ground:



    The Russians built the ZIL-2906 for recovering the re-entered Soyuz space capsules from extremely difficult terrain:



    Although they never took off, screw-propelled vehicles still see extremely narrow usage today for specialized construction in unusual climates. Also, the occasional daring offroader will try a screw-propelled build:


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    Jon
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    Screw propelled ship/icebreaker?


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    This is the Garinko II, used as a tourist sightseeing vessel in the sea of Mombetsu off Hokkaido, Japan. It was designed specifically for drift ice excursions. Around February, which is the peak of drift ice tourism, the ship becomes lively with many domestic and foreign tourists. In the summer season the ship operates around Monbetsu Port, so you can enjoy it as a sight-seeing cruise or fishing boat.

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    It must have regular propellors also. Those screws at the front would be extremely inefficient for forward propulsion. And at 2:55 it appears to be making way faster than the front screws are operating

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    Jon
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    47-second video:




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