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The 22-blade fan of an A320's V2500-A1 Rolls-Royce based the 10-stage HP compressor on an 8-stage run in the RB401 in the mid 1970's followed by a 9-stage run in the RJ.500 . The V.2500 would use 10 stages, with the first 4 with variable stators, giving a pressure ratio of 20:1. [ 4 ]
A propfan, also called an open rotor engine, open fan engine [1] [2] or unducted fan (as opposed to a ducted fan), is a type of aircraft engine related in concept to both the turboprop and turbofan, but distinct from both. The design is intended to offer the speed and performance of a turbofan, with the fuel economy of a turboprop.
The fan diameter was expected to range from 108 to 118 in while having a bypass ratio of 18:1 to 20:1. Availability of the engine was estimated between 1992 and 1994. [1] In December 1986 the V2500 SuperFan was officially offered to Airbus as powerplant for the Airbus A340 being developed at that time. With that offer, more design details were ...
The first V2500 variant, the V2500-A1, has a thrust output of 110 kN (25,000 pounds-force), [20] hence the name. It is 4% more efficient than the CFM56, with cruise thrust-specific fuel consumption for the -A5 at 16.3 and 16.9 g/kN/s (0.58 and 0.60 lb/lbf/h) for the CFM56-5A1.
TV Shows That Inspired Fan Campaigns Over the Years ... - AOL
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The Contrafan was designed to power the four-engine Boeing 747 at a cruise speed of Mach 0.9. Like the General Electric Unducted Fan (UDF), the RB529 would have direct-drive contra-rotating fans in pusher configuration, and it would have variable pitch fan blades that were capable of reverse thrust.
Once he arrived in New Orleans, Jabbar was spotted on surveillance video planting IEDs near the intersection of Bourbon and Orleans streets. At 3:15 a.m., FBI bomb technicians recovered two other ...