Wingships (WIG, Wing In Ground) utilise water as runways to reach their lift-off speed, which is determined by the wing loading. High wing loadings are desirable for high cruising speeds with inherent height- and longitudinal stability. To build up the necessary dynamic air pressure under the wings, they need roughly 3 times more power to overcome the hydrodynamic humpdrag compared to the drag during ground effect flight. Contrary to aircraft, WIGs cannot utilise the installed power to increase the cruising speed without the loss of efficiency and natural height stability. So it is necessary to develop suitable devices as lift-off-aids in order to reduce the recommended lift-off power. Investigations had been done with an air cushion on the X-113 craft and hydrofoils on the X-114 craft, produced by the author's company. With support of the German Ministry for Education, Science, Research and Technology (BMBF) Fischer-Flugmechanik (FF) has developed the 'Hoverwing-Technology' in order to further reduce the necessary lift-off power. The principle of this technology, for which FF has patent rights, is the building up of static air pressure between the catamaran floats. After lift-off the dynamic pressure will replace the static pressure and the craft operates as a WIG with high lift to drag ratios. FF is developing the 'Hoverwing 80', with the target to transport 80 passengers at 100 kts. Some test results with a scaled down two Seater will be demonstrated by video extracts.


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    Title :

    The hoverwing technology bridge between WIG and ACV


    Additional title:

    Die Schwebeflügeltechnik - Brücke zwischen Tragflächenboot und Luftkissenfahrzeug


    Contributors:
    Fischer, H. (author) / Matjasic, K. (author)


    Publication date :

    1997


    Size :

    11 Seiten, 12 Bilder



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    The Hoverwing Technology - Bridge Between WIG and ACV

    Fischer, H. / European Association of Aerospace Students | British Library Conference Proceedings | 2002


    From Airfisch to Hoverwing

    Fischer, H. / Matjasic, K. / Flugmechanik, F. et al. | British Library Conference Proceedings | 1998



    Technische Entwicklung von Bodeneffektfahrzeugen, Phase 3 - Hoverwing . Abschlußbericht

    Gronarz, Andreas / Zöllner, Joachim | HENRY – Federal Waterways Engineering and Research Institute (BAW) | 2000

    Free access