New Push in Stick Pusher Training
By Patrick R. Veillette, Ph.D.
Source: Business & Commercial Aviation
Most of pilots receive initial fixed-wing training in a basic aircraft such as a Cessna 152, and the sensations experienced during stall demonstrations leave an imprint as to how an aircraft will provide stall warning. However, those sensations do not carry over to a business jet. Rather, the initial indication of a stall can be aural, tactile or visual and these can be either naturally or synthetically induced.
Transport Canada's Advisory Circular warns, “Airflow separation is often indicated by airframe buffeting and a reduction in controllability of the aircraft. However, for some aircraft, the loss in lift is sudden and without any preceding buffet.” Moreover, an aircraft can produce varying indications of an impending stall depending altitude, icing or other factors.
A natural or synthetic stall indication may include one or more of the following indications:
(1) Aerodynamic buffeting;
(2) Reduced roll stability and aileron effectiveness;
(3) Visual or aural cues and warnings;
(4) Reduced elevator (pitch) authority;
(5) Inability to maintain altitude or arrest rate of descent;
(6) Stick-shaker activation.