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2. Fan disk - Wikipedia

   en.wikipedia.org/wiki/Fan_disk

   The one shown in the photo is over 31 inches (1.2 m) in diameter, and rotates up to 3800 rotations per minute (RPM). [3] Fan disks must withstand the centrifugal force of the attached fan blades. Because of their size and weight, a failed fan disk can severely damage an aircraft, as happened with United Airlines Flight 232 in 1989. [4]

3. Ducted fan - Wikipedia

   en.wikipedia.org/wiki/Ducted_fan

   An assembly designed throughout as a single integrated unit is referred to as a fan pod or ducted propulsor. [3] [4] An advantage of the pod approach is that the design of each component can be matched to the others, helping to maximise performance and minimise weight.

4. Fan (machine) - Wikipedia

   en.wikipedia.org/wiki/Fan_(machine)

   A household electric fan A large cylindrical fan. A fan is a powered machine that creates airflow. A fan consists of rotating vanes or blades, generally made of wood, plastic, or metal, which act on the air. The rotating assembly of blades and hub is known as an impeller, rotor, or runner. Usually, it is contained within some form of housing ...

5. Drive bay - Wikipedia

   en.wikipedia.org/wiki/Drive_bay

   They were 3 + 1 ⁄ 4 inches (82.6 mm) high, 5 + 3 ⁄ 4 inches (146.1 mm) wide, and up to 8 inches (203.2 mm) deep, used mainly for hard disk drives and floppy disk drives. This is the size of the internal (screwed) part of the bay, as the front side is actually 5 + 7 ⁄ 8 inches (149.2 mm). The difference between those widths and the name of ...

6. Evaporative cooler - Wikipedia

   en.wikipedia.org/wiki/Evaporative_cooler

   A misting fan is similar to a humidifier. A fan blows a fine mist of water into the air. If the air is not too humid, the water evaporates, absorbing heat from the air, allowing the misting fan to also work as an air cooler. A misting fan may be used outdoors, especially in a dry climate. It may also be used indoors.

7. Hydra 70 - Wikipedia

   en.wikipedia.org/wiki/Hydra_70

   The Hydra 70 is derived from the 2.75-inch (70 mm) diameter Mk 4/Mk 40 Folding-Fin Aerial Rocket developed by the United States Navy for use as a free-flight aerial rocket in the late 1940s. The Mk 40 was used during the Korean and Vietnam wars to provide close air support to ground forces from about 20 different firing platforms, both fixed ...

8. Azipod - Wikipedia

   en.wikipedia.org/wiki/Azipod

   The first Azipod unit, installed on the Finnish fairway support vessel Seili in 1990, is now displayed at the Forum Marinum maritime museum in Turku, Finland.. In 1987, the Finnish National Board of Navigation made a co-operation proposal to the electrical equipment company Strömberg (later ABB) and the Finnish shipbuilder Wärtsilä Marine for the development of a new type of electric ...