With the flight plan in the Apex system (see sidebar), preparation for departure is stunningly simple: Trims are set, 15 degrees of flap selected and the stick pusher and shaker tested--that's it.
Full flaps, 40 degrees, provides substantial drag so flying out of a stick pusher event, with full power applied smartly, still requires the sacrifice of a few hundred feet to accelerate out of the near stall speed regime and establish a climb.
While descending in icing conditions, the crew allows their airplane to get slow enough the stick pusher
EASA today issued a Transport Canada airworthiness directive (AD) for Bombardier CRJ700 and CRJ900-series regional jets equipped with certain part number Thales angle-of-attack (AOA) transducers, devices that provide information for the aircraft's stall warning, stick shaker and stick pusher
After studying options, engineers enhanced the stall warning system and installed a stick pusher on the C-130J.
If these warnings are ignored and the pilot continues to decelerate the airplane, the stick pusher activates, doing what the pilot would ordinarily do by pushing the nose of the aircraft forward and thus preventing aerodynamic stall, Price said.
Stick pushers operate by monitoring an angle-of-attack sensor and forcing the yoke forward when it becomes dangerously close to exceeding the critical angle of attack.
Most modern aircraft designs are concerned more with equipping the aircraft with safeguards such as stick pushers or AOA limiters which prevent the aircraft from stalling thereby preventing deep stalls from occurring.