Originally Posted by
2ndsegment
Just to be more public-
Stalls
Stalls are primarily a factor of angle of attack. The F-4 will provide several stall warning cues that are discussed in the following paragraphs. The aircraft comes equipped with a rudder pedal shaker that activates at a fixed threshold and warns the pilot before approaching stall angle of attack. Tthe angle of attack at which the pedal shaker is activated is dependent on aircraft type as listed below.class "wikitable" pedal shaker activation - aircraft angle of attack - early f-4b aircraft 22.3 - late f-4b and f-4n aircraft 21.3 Pedal shaker activation – Angle of Attack |
Early F-4B aircraft |
22.3 units |
Late F-4B and F-4N aircraft |
21.3 units |
and from PRUNE
For instance, in the Harrier, if more than a 10°angle of sideslip exists, the aircraft can enter into an uncommanded roll,which can be unrecoverable. To prevent this hazard, the Harrier uses aweathervane-type probe extending into the airflow in front of the cockpitwhich measures angle of sideslip. The weathervane-type probe aligns withthe relative wind, allowing the aircraft to determine angle of sideslip bymeasuring the difference between the rotational position of theweathervane-type probe and the normal alignment of the body of theaircraft with the airflow. In the Harrier, if the angle of sideslipbecomes excessive, a warning is provided to the pilot by a pedal shakerwhich shakes the rudder pedals. The pilot can also visually monitor theangle of sideslip by observing the amount of angular offset of theweathervane probe. However, the Harrier's weathervane probe is fixed inplace even when the Harrier is in normal wing borne flight. This increasesthe drag of the Harrier at higher speeds.