Pistonless rotary engine

Aug 31, 2008 - 1:43 PM
The FAA has issued a proposed Airworthiness Directive for GE CF34 turbofan engines with high-pressure-rotor, four-step, air-balance-piston, stationary seal
Oct 16, 2006 - 9:11 AM
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.