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There are two solutions to this problem: 1) Open up the cold nozzle area at low flight speeds, which moves the fan working line away from the surge. This has little effect on the position or slope of the surge line. OR 2) Make the effective surge line of the fan shallower by progressively reducing the pitch of the fan as the engine is throttled.
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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.
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Iga Swiatek is the second high-profile tennis player to test positive for a banned substance this year, joining Jannik Sinner. While Sinner, currently the No. 1 ranked man, was fully cleared ...
An ultra-limited edition cd single of "Echo (You and I) was released on 9 April 2012 in France [4]. For promotional purpose, she recorded several duets of this particular song with various Eurovision finalists from previous seasons such as Niels Brinck , Claudia Faniello , Varga Viktor , and Keo .
Nervo performed at Digital Dreams 2014 in Toronto, Ontario, Canada along with many others like Dimitri Vegas & Like Mike, Eric Prydz and Tiesto. In addition, Nervo also performed at Escapade 2014 in Ottawa , Ontario, Canada alongside well-known DJ's, such as Kaskade , Carnage and Zeds Dead .
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