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  2. Propeller - Wikipedia

    en.wikipedia.org/wiki/Propeller

    An advanced type of propeller used on the American Los Angeles-class submarine as well as the German Type 212 submarine is called a skewback propeller. As in the scimitar blades used on some aircraft, the blade tips of a skewback propeller are swept back against the direction of rotation. In addition, the blades are tilted rearward along the ...

  3. Ship measurements - Wikipedia

    en.wikipedia.org/wiki/Ship_measurements

    Shaft Horsepower (SHP) – The amount of mechanical power delivered by the engine to a propeller shaft. One horsepower is equivalent to 746 watts. Tonnage – A number derived from any of several methods to calculate the volume or other number indicative of a ship's cargo carrying capacity.

  4. USS Seawolf (SSN-21) - Wikipedia

    en.wikipedia.org/wiki/USS_Seawolf_(SSN-21)

    1 pump-jet propeller; Speed: 25+ knots submerged, 18+ knots surfaced: Test depth: Greater than 800 ft (240 m) Complement: 15 officers and 101 enlisted: Armament: 8 × 26.5-inch torpedo tubes, sleeved for 21-inch weapons [5] (up to 50 Tomahawk land attack missile/Harpoon anti-ship missile/Mk 48 guided torpedo carried in torpedo room) [6]

  5. LCM-8 - Wikipedia

    en.wikipedia.org/wiki/LCM-8

    The LCM-8 fleet of fifteen was to be replaced by six Australian designed type LCM2000 waterjet propelled craft, however these craft were scrapped, after not meeting the required in-service specifications and being deemed not fit for use for the intended Kanimbla-class. [6] [7] [8] The Army will now continue to operate the LCM-8 until 2027.

  6. Toroidal propeller - Wikipedia

    en.wikipedia.org/wiki/Toroidal_propeller

    A toroidal propeller is a type of propeller that is ring-shaped with each blade forming a closed loop. The propellers are significantly quieter at audible frequency ranges, between 20 Hz and 20 kHz, while generating comparable thrust to traditional propellers.

  7. Airboat - Wikipedia

    en.wikipedia.org/wiki/Airboat

    The first airboat was the Ugly Duckling, an aircraft propeller testing vehicle built in 1905 in Nova Scotia, Canada, by a team led by inventor Alexander Graham Bell. Ugly Duckling was a catamaran -type boat driven by an aircraft propeller hooked up to a water-cooled aircraft engine weighing 2,500 pounds (1,100 kg).

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