EAST HARTFORD, Conn., Sept. 25, 2013 /PRNewswire/ --Pratt & Whitney and the U.S. Air Force Research Laboratory (AFRL) have begun testing of Pratt & Whitney's unique, adaptive supersonic fighter engine fan rig based on a full-scale F135 development fan to advance the next generation of military fighter engine technology. The purpose of the adaptive fan rig test is to mature technologies associated with adaptive bypass flow associated with a third stream of air, which will enable efficiency improvements in long-range persistence and high thrust combat maneuvers as well as in transonic and supersonic flight conditions. Pratt & Whitney is a United Technologies Corp. (NYSE: UTX) company.
Similar to changing gears in a car or on a bicycle, changing an aircraft engine's bypass ratio allows the engine to be optimized for high thrust takeoffs, while maintaining the efficiency of a commercial airline's high bypass engine in cruise conditions. Unlike commercial airline engines which are attached to the wing, engines used in modern fighter aircraft must use smaller diameter turbofans and be embedded within the aircraft. Consequently, there is a performance tradeoff between high thrust capabilities and optimum efficiency experienced in cruise conditions. Developing a next generation variable cycle adaptive engine is therefore essential to meeting the evolving needs of the warfighter.
Modern military turbofan engines have two airstreams – one that passes through the core of the engine, and another that bypasses the core. Development of a third stream of airflow will allow for improved fuel efficiency and cooler heat sinks which improve thermal management of the air system and reduced heat signature.
"Developing an effective adaptive fan concept is a critical step in advancing technology that will ensure next generation air dominance for our military," said Jack Hoying, program manager, Air Force Research Laboratory. "We are working closely with our industry partners to develop game-changing technologies that will truly advance the state of the art for military engines in the 21 st Century."The adaptive fan variable cycle technology will leverage and improve upon Pratt & Whitney's baseline experience in building and fielding 5 th generation fighter engines – the F119 that powers the F-22 Raptor, and the F135 powering the F-35 Lightning II, according to Bennett Croswell, president, P&W Military Engines. "Pratt & Whitney has an innovative approach to achieving variable cycle features with a multiple flow path architecture," said Croswell. "We're building on our foundation of proven 5 th generation capabilities, and we are now mastering adaptive technologies – really expanding the boundaries of state of the art engine technology critical for the next 6 th generation aircraft." The fan rig test is being conducted in tandem with several other technology initiatives that are advancing the state of military engine technology, including the AFRL-sponsored Adaptive Engine Technology Demonstration (AETD) program, the U.S. Navy Fuel Burn Reduction (FBR) program, and other internal Pratt & Whitney advanced engine concept efforts.
Select the service that is right for you!COMPARE ALL SERVICES
- $2.5+ million portfolio
- Large-cap and dividend focus
- Intraday trade alerts from Cramer
- Weekly roundups
Access the tool that DOMINATES the Russell 2000 and the S&P 500.
- Buy, hold, or sell recommendations for over 4,300 stocks
- Unlimited research reports on your favorite stocks
- A custom stock screener
- Upgrade/downgrade alerts
- Diversified model portfolio of dividend stocks
- Alerts when market news affect the portfolio
- Bi-weekly updates with exact steps to take - BUY, HOLD, SELL
- Real Money + Doug Kass Plus 15 more Wall Street Pros
- Intraday commentary & news
- Ultra-actionable trading ideas
- 100+ monthly options trading ideas
- Actionable options commentary & news
- Real-time trading community
- Options TV