Rolls-Royce’s development of an open-rotor engine for the next generation of midsize airliners has taken a giant leap forward after wind-tunnel tests revealed its design would comfortably meet current Stage 4 noise regulations.
Pistonless rotary engine
The FAA has issued a proposed Airworthiness Directive for GE CF34 turbofan engines with high-pressure-rotor, four-step, air-balance-piston, stationary seals to remove these seals and incorporate an eight-step seal at the next piece-part exposure.
CFM International has thrown down the gauntlet to engine manufacturers hoping to compete on the next generation of single-aisle airliners by accelerating its research on an advanced engine to replace its CFM56 by as early as 2015, the company announced here yesterday.
A new two-seat helicopter powered by a twin-pack engine is being shown for the first time on Stand W903. Although roughly the size of a Robinson R22, the Swisscopter is notable for its innovative propulsion system that provides a level of safety unusual in this class of helicopter.
Meggitt (Stand A536) is introducing a number of products, including new developments in engine monitoring equipment revealed by its Vibro-Meter subsidiary. Fitted on the Boeing 737, for example, the new vibration monitors continuously check specific engine bearings and detect unusual signatures using advanced signal processing.
Bell says its new anti-torque system will offer directional control, reductions in main rotor speed and noise and higher cruise speeds–up to 170 knots. Bell will evaluate the Propulsive Anti-Torque System (PATS) next year using a full-size gas turbine engine, inlet fan, bifurcated ducting and a series of test thrusters.