e-Military Product News

Fall 2015

The ground support industry's source for news, articles, events, product and services information.

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6 e-Military Product News for Aviation Fall 2015 T he frst jet engine used by the U.S. military was the result of a top secret project that took place in GE labs. Seven decades later, the Air Force is working with GE Aviation on the ultimate fying machine, and this time the partners are willing to talk about it. The "adap- tive cycle" engine, as they call it, can automatically switch between the raw power of a fghter jet and slower, but more effcient fight desired by civilian airlines. GE has been making jet engines for U.S. military since 1941, including the F110 engine for the F-16. This F-16 Fighting Falcon is from the 80th Fighter Squadron, Kunsan Air Base, Republic of Korea. U.S. AIR FORCE/STAFF SGT. NICK WILSON Dave Jeffcoat, GE's ADVENT project manager, says the design will "opti- mize the performance" of the engine for every part of the pilot's mission. "We vary the pressure and bypass ratios mid-fight," he says. "In takeoff conditions, the engine operates like a conventional fghter aircraft in a high-pressure ratio, low-bypass mode, allowing pilots to maximize thrust. But during cruise or loiter conditions, you don't need that thrust, so we can transition to a high-bypass ratio, low- pressure ratio mode to be fuel effcient like a commercial engine. This adap- tive feature of the design will deliver unprecedented performance capabili- ties to the Department of Defense," he says. By marrying this adaptive archi- tecture with a high-performance, heat-resistant core, this engine could achieve 10 percent higher thrust, 25 percent better fuel consumption, and 30 percent longer range, compared to the world's most advanced military jet engines operating around the world today. "To put it simply, the adaptive cycle engine is a new architecture that takes the best of a commercial engine and combines it with the best of a fghter engine," says Jed Cox, who leads the Adaptive Versatile Engine Technology (ADVENT) project for the U.S. Air Force Research Lab. "So when I need high thrust, I can get high thrust. But when I don't need high thrust, I can move into a super-fuel-effcient mode." F E A T U R E GE and Air Force Unveil the The "adaptive cycle" engine on the Ultimate Flying Machine can automatically switch between the raw power of a fghter jet and slower, but more effcient fight desired by civilian airlines

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