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  2. Ford Model T - Wikipedia

    en.wikipedia.org/wiki/Ford_Model_T

    The Ford Model T is an automobile that was produced by the Ford Motor Company from October 1, 1908, to May 26, 1927. [16] It is generally regarded as the first mass-affordable automobile, which made car travel available to middle-class Americans. [17]

  3. Propelling nozzle - Wikipedia

    en.wikipedia.org/wiki/Propelling_nozzle

    The nozzle opens up in two halves which come together to redirect the exhaust partially forward. Since the nozzle area has an influence on the operation of the engine (see below), the deployed thrust reverser has to be spaced the correct distance from the jetpipe to prevent changes in engine operating limits. [16]

  4. Ducted propeller - Wikipedia

    en.wikipedia.org/wiki/Ducted_propeller

    Kort nozzle The towboat Dolphin I in a floating drydock on the Mississippi River in Algiers, Louisiana. 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 ...

  5. 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 ...

  6. Thrust vectoring - Wikipedia

    en.wikipedia.org/wiki/Thrust_vectoring

    A multi-axis thrust vectoring engine nozzle in motion. Thrust vectoring, also known as thrust vector control (TVC), is the ability of an aircraft, rocket or other vehicle to manipulate the direction of the thrust from its engine(s) or motor(s) to control the attitude or angular velocity of the vehicle.

  7. Rocket engine nozzle - Wikipedia

    en.wikipedia.org/wiki/Rocket_engine_nozzle

    Figure 1: A de Laval nozzle, showing approximate flow velocity increasing from green to red in the direction of flow Density flow in a nozzle. A rocket engine nozzle is a propelling nozzle (usually of the de Laval type) used in a rocket engine to expand and accelerate combustion products to high supersonic velocities.

  8. Dornier Do 31 - Wikipedia

    en.wikipedia.org/wiki/Dornier_Do_31

    Pitch control nozzles in the tail, fed from the Pegasus engines, two pointing up, two pointing down Beyond providing adequate lift and control, other factors influenced the propulsion system. According to Dow, noise was a considerable concern, particularly as the airframe's critical frequency was close to that which was naturally generated by ...

  9. Forward auction - Wikipedia

    en.wikipedia.org/wiki/Forward_auction

    Two types of forward auctions are common. The first is a liquidate auction. Here buyers seek to obtain the lowest price for an item they are interested in. The second type is a marketing efficiency auction. Buyers wish to obtain a unique item.