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  2. Radio-controlled boat - Wikipedia

    en.wikipedia.org/wiki/Radio-controlled_boat

    Typically power boats have two controls, rudder, outboard motor or stern drive and throttle control. Powered scale boats will often have additional remote-controlled functions to improve realism, e.g. sounding fog horns, rotating radar antennae etc. Some of the more sophisticated powered racing boats may also have additional remote-controlled ...

  3. Rolls-Royce LiftSystem - Wikipedia

    en.wikipedia.org/wiki/Rolls-Royce_LiftSystem

    the rear of the F135 engine (nozzle rotated down) that powers the Rolls-Royce LiftSystem. Instead of using separate lift engines, like the Yakovlev Yak-38, or rotating nozzles for engine bypass air, like the Harrier, the "LiftSystem" has a shaft-driven LiftFan, designed by Lockheed Martin and developed by Rolls-Royce, [3] and a thrust vectoring nozzle for the engine exhaust that provides lift ...

  4. Positive pressure enclosure - Wikipedia

    en.wikipedia.org/wiki/Positive_pressure_enclosure

    A positive pressure enclosure, also known as a welding habitat or hot work habitat, is a chamber used to provide a safe working environment for performing hot work in the presence of explosive gases or vapors. They are commonly used in welding environments and are associated with the offshore oil industry. [1]

  5. Ducted propeller - Wikipedia

    en.wikipedia.org/wiki/Ducted_propeller

    A ducted propeller, also known as a Kort nozzle, is a marine propeller fitted with a non-rotating nozzle. It is used to improve the efficiency of the propeller and is especially used on heavily loaded propellers or propellers with limited diameter.

  6. Airboat - Wikipedia

    en.wikipedia.org/wiki/Airboat

    An airboat (also known as a planeboat, swamp boat, bayou boat, or fanboat) is a flat-bottomed watercraft propelled by an aircraft-type propeller and powered by either an aircraft or automotive engine. [a] It is commonly used for fishing, hunting, recreation, and ecotourism.

  7. Welding power supply - Wikipedia

    en.wikipedia.org/wiki/Welding_power_supply

    Welding power supplies primarily serve as devices that allow a welder to exercise control over whether current is alternating current (AC) or direct current (DC), as well as the amount of current and voltage. Power supplies for welding processes that use shielding gas also offer connections for gas and methods to control gas flow.

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