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  2. Hewitt-Sperry Automatic Airplane - Wikipedia

    en.wikipedia.org/wiki/Hewitt-Sperry_Automatic...

    On the first try, before full flying speed had been reached, the aircraft developed enough lift to raise the front wheels off the track, and another crash resulted. It was time to re-think the catapult system, and to help design it, Sperry and Hewitt hired a young and promising engineer named Carl Norden. The first try with the new system was ...

  3. Hydrofoil - Wikipedia

    en.wikipedia.org/wiki/Hydrofoil

    Description. The hydrofoil usually consists of a winglike structure mounted on struts below the hull, or across the keels of a catamaran in a variety of boats (see illustration). As a hydrofoil-equipped watercraft increases in speed, the hydrofoil elements below the hull (s) develop enough lift to raise the hull out of the water, which greatly ...

  4. Fireboat - Wikipedia

    en.wikipedia.org/wiki/Fireboat

    Deluge, retired fire fighting tug. Tokyo Fire Department 's Ariake fireboat. The Edward M. Cotter of Buffalo, New York, considered the world's oldest active fireboat. A fireboat or fire-float is a specialized watercraft with pumps and nozzles designed for fighting shoreline and shipboard fires.

  5. Forces on sails - Wikipedia

    en.wikipedia.org/wiki/Forces_on_sails

    Right-hand boat: Up wind (close-hauled) with attached airflow—predominant lift component both propels the boat and contributes to heel. Points of sail (and predominant sail force component for a displacement sailboat). A. Luffing (no propulsive force) — 0-30°. B. Close-Hauled (lift)— 30-50°. C. Beam Reach (lift)— 90°.

  6. List of boat lifts - Wikipedia

    en.wikipedia.org/wiki/List_of_boat_lifts

    Geheyan dam boat lift, also in Hubei Province, capable of lifting vessels of 300 tons displacement. The dam was completed in 1994, but technical difficulties delayed the opening of the ship lift for four more years. Longtan dam boat lift, capacity to lift vessels of 250 tons, in a basin 40×10.8×1.8 meters, and a vertical lift of 68.5 meters.

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