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  2. Gear pump - Wikipedia

    en.wikipedia.org/wiki/Gear_pump

    An exploded view of an external gear pump Fluid flow in an external gear pump Fluid flows from left to right in this internal gear pump. Oil pump from a scooter engine. A gear pump uses the meshing of gears to pump fluid by displacement. [1] They are one of the most common types of pumps for hydraulic fluid power applications. The gear pump was ...

  3. Centrifugal pump selection and characteristics - Wikipedia

    en.wikipedia.org/wiki/Centrifugal_pump_selection...

    Pump Characteristic curve; the head produced reduces with the discharge of the pump. Pump curves are quite useful in the pump selection, testing, operation and maintenance. Pump performance curve is a graph of differential head against the operating flow rate. They specify performance and efficiency characteristics.

  4. Charge-pump phase-locked loop - Wikipedia

    en.wikipedia.org/wiki/Charge-pump_phase-locked_loop

    Here is a normalized phase shift and + is a ratio of the VCO frequency + to the reference frequency . Finally, the discrete-time model of second order CP-PLL without the VCO overload [ 4 ] [ 6 ]

  5. Viking Age arms and armour - Wikipedia

    en.wikipedia.org/wiki/Viking_Age_arms_and_armour

    Viking landing at Dublin, 841, by James Ward (1851-1924). Knowledge about military technology of the Viking Age (late 8th to mid-11th century Europe) is based on relatively sparse archaeological finds, pictorial representations, and to some extent on the accounts in the Norse sagas and laws recorded in the 12th–14th centuries.

  6. List of pump-action rifles - Wikipedia

    en.wikipedia.org/wiki/List_of_pump-action_rifles

    A pump-action rifle is a rifle where the forend can be moved forward and backward in order to eject a spent round of ammunition and to chamber a new one. Pump-action mechanisms are often regarded as faster than a bolt action and somewhat faster than a lever action, as it does not require the trigger hand to be removed from the trigger while reloading.

  7. Viking SF-2A Cygnet - Wikipedia

    en.wikipedia.org/wiki/Viking_SF-2A_Cygnet

    The Viking SF-2A Cygnet, also called the Sisler SF-2A Cygnet and the HAPI SF-2A Cygnet, is an American STOL amateur-built aircraft, designed by Bert Sisler and produced by Viking Aircraft LLC. The aircraft is supplied in the form of plans for amateur construction. The Cygnet first flew in 1973. [1] [2]

  8. Military Bowl official ends up with bloody face after trying ...

    www.aol.com/sports/military-bowl-official-ends...

    An official ended up with a gash below his eye after a scuffle late in East Carolina’s Military Bowl win over NC State.. The official got hit in the face by a player’s helmet as members of ...

  9. Viking (rocket engine) - Wikipedia

    en.wikipedia.org/wiki/Viking_(rocket_engine)

    An unusual feature of the Viking engines is their water tank and water pump, used to cool the exhaust gasses of the gas generator. The hot exhaust of the gas generator is cooled by water injection to 620 °C before being used to drive the three coaxial pumps (for water, fuel and oxidizer) and to pressurize the fuel tanks. The water was also ...

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