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2. General Electric GE9X - Wikipedia

   en.wikipedia.org/wiki/General_Electric_GE9X

   The fan is housed in 134 in (340 cm) diameter case. [26] The GE9X has 16 blades, whereas the similarly sized GE90 has 22 and the smaller GEnx has 18. Having fewer fan blades reduces the engine weight, improves aerodynamic efficiency, and allows the low pressure (LP) fan and booster to spin faster to better match its speed with the LP turbine.

3. 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 ...

4. Centrifugal fan - Wikipedia

   en.wikipedia.org/wiki/Centrifugal_fan

   Figure 1: Components of a centrifugal fan An external motor belt driven inline centrifugal fan discharging inline to the exterior of a building through a duct. Unlike non-inline/non-concentric impeller casing design with a cutoff blade above, the concentrically symetric cylinder casing and impeller geometry of inline type redirects the outflow around so that it is parallel to the inflow of gases.

5. General Electric GEnx - Wikipedia

   en.wikipedia.org/wiki/General_Electric_GEnx

   Fan blades and outlet guide vanes of GEnx-2B Detail of GEnx core The GEnx is derived from the GE90 with a fan diameter of 111.1 in (282 cm) for the 787 and 104.7 in (266 cm) for the 747-8. To reduce weight, it features 18 composite fan blades, a composite fan case and titanium aluminide stage 6 and 7 low-pressure turbine blades.

6. Pratt & Whitney F119 - Wikipedia

   en.wikipedia.org/wiki/Pratt_&_Whitney_F119

   The shroud-less fan has wide-chord, low aspect ratio hollow titanium fan blades that are linear-friction welded to the disks to form single-piece integrally-bladed rotors (IBRs), or blisks. The fan and compressor stators and thrust-vectoring nozzle use a burn-resistant titanium alloy called Alloy C, with the first row of vanes variable in order ...

7. 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.