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2. United Airlines Flight 1175 - Wikipedia

   en.wikipedia.org/wiki/United_Airlines_Flight_1175

   It was re-designed exclusively for the 777 with a larger 112-inch (280 cm) diameter fan section using 22 hollow core fan blades. The PW4000-112 fan blade is a wide chord airfoil made of a titanium alloy, about 40.5 inches (103 cm) long and about 22.25 inches (56.5 cm) wide at the blade tip.

3. Pratt & Whitney PW1000G - Wikipedia

   en.wikipedia.org/wiki/Pratt_&_Whitney_PW1000G

   The A320 PW1100G fan has 20 blades, down from 36 in the CFM56-5B. [ 43 ] Pratt & Whitney claims the PW1000G is 16% more fuel efficient than current engines used on regional jets and single-aisle jets, as well as being up to 75% quieter. [ 44 ]

4. United Airlines Flight 328 - Wikipedia

   en.wikipedia.org/wiki/United_Airlines_Flight_328

   It was redesigned exclusively for the 777 with a larger 112-inch (280 cm) diameter fan section using 22 hollow-core fan blades. The PW4000-112 fan blade is a wide-chord airfoil made of a titanium alloy, about 40.5 inches (103 cm) long and about 22.25 inches (56.5 cm) wide at the blade tip. A PW4000-112 fan blade can weigh a maximum of 34.85 ...

5. Pratt & Whitney PW4000 - Wikipedia

   en.wikipedia.org/wiki/Pratt_&_Whitney_PW4000

   Pratt & Whitney PW4000. The Pratt & Whitney PW4000 is a family of dual-spool, axial-flow, high-bypass turbofan aircraft engines produced by Pratt & Whitney as the successor to the JT9D. It was first run in April 1984, was FAA certified in July 1986, and was introduced in June 1987. With thrust ranging from 50,000 to 99,040 lbf (222 to 441 kN ...

6. Ceiling fan - Wikipedia

   en.wikipedia.org/wiki/Ceiling_fan

   Ceiling fan. A modern ceiling fan. A ceiling fan mid-spin. A ceiling fan is a fan mounted on the ceiling of a room or space, usually electrically powered, that uses hub-mounted rotating blades to circulate air. They cool people effectively by increasing air speed. Fans do not reduce air temperature or relative humidity, unlike air-conditioning ...

7. General Electric GE90 - Wikipedia

   en.wikipedia.org/wiki/General_Electric_GE90

   These blades provided double the strength at one-third the weight of traditional titanium fan blades. The 22 fan blades were a significant reduction from the 38 blades used in GE's prior large turbofan, the CF6, despite the 30-inch (760 mm) greater diameter of the GE90. Having fewer fan blades reduces the engine weight and improves aerodynamic ...