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  2. Ram air turbine - Wikipedia

    en.wikipedia.org/wiki/Ram_air_turbine

    A ram air turbine driving an electrical generator was chosen for the VC10 because of its use of "packaged" hydraulically powered flying controls, rather than a centralised hydraulic system. The individual package units of the VC10 were each powered electrically and so emergency redundancy for the VC10 relied on quadruple generators and a backup ...

  3. Constant speed drive - Wikipedia

    en.wikipedia.org/wiki/Constant_Speed_Drive

    Constant speed drive for Boeing 727, made by Sundstrand Corporation. A constant speed drive (CSD) also known as a constant speed generator, is a type of transmission that takes an input shaft rotating at a wide range of speeds, delivering this power to an output shaft that rotates at a constant speed, despite the varying input.

  4. Emergency power system - Wikipedia

    en.wikipedia.org/wiki/Emergency_power_system

    A backup generator for a large apartment building A backup power fuel cell for telecom applications A portable emergency power generator in a shipping container. An emergency power system is an independent source of electrical power that supports important electrical systems on loss of normal power supply.

  5. Standby generator - Wikipedia

    en.wikipedia.org/wiki/Standby_generator

    Standby generators. A standby generator is a back-up electrical system that operates automatically. [1] Within seconds of a utility outage an automatic transfer switch senses the power loss, commands the generator to start and then transfers the electrical load to the generator. The standby generator begins supplying power to the circuits. [2]

  6. Government contract flight - Wikipedia

    en.wikipedia.org/wiki/Government_contract_flight

    These flights are virtually identical to standard airline flights, complete with flight attendants, meal service, and in-flight movies. A contract flight returning from an overseas area is often referred to as a freedom bird , since it usually carries military members who are returning to the United States after what is commonly a one-to-three ...

  7. Uninterruptible power supply - Wikipedia

    en.wikipedia.org/wiki/Uninterruptible_power_supply

    Newer rotary units use technologies such as magnetic bearings and air-evacuated enclosures to increase standby efficiency and reduce maintenance to very low levels. Typically, the high-mass flywheel is used in conjunction with a motor-generator system. These units can be configured as: A motor driving a mechanically connected generator, [7]

  8. Stationary fuel-cell applications - Wikipedia

    en.wikipedia.org/wiki/Stationary_fuel-cell...

    Emergency power systems are a type of fuel cell system, which may include lighting, generators and other apparatus, to provide backup resources in a crisis or when regular systems fail. They find uses in a wide variety of settings from residential homes to hospitals , scientific laboratories, data centers , [ 6 ] telecommunication [ 7 ...

  9. List of aviation, avionics, aerospace and aeronautical ...

    en.wikipedia.org/wiki/List_of_aviation,_avionics...

    Engine Flight Cycle EFC 2: expect further clearance EFD Electronic flight display EFFRA engine failure flap retraction altitude EFIS electronic flight instrument system: EFH Engine Flight Hour EFP engine failure procedure EFS elevator feel shift: EFTO engine failure on take-off: EFVS Enhanced flight visual system EGPWS enhanced ground proximity ...

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