When the direct lift control was engaged, all of the spoilers were deflected 3 degrees.[1] The horizontal stabilizer trailing-edge are displaces \(6\deg\)s downward from the trim position to compensate for the pitching moment from the spoiler deflection.[1]
A thumbwheel controlled the DLC system.[1] To increase the descent rate the thumbwheel was rotated forward for up to \(12\deg\) spoiler extension and \(8\deg\)s of stabilizer deflection.[1] To decrease the descent rate, the thumbwheel was rotated fully aft, and the spoilers retracted to \(-4.5\deg\)s and the horizontal stabilizer returned to its trim position.[1] When the DLC was not in use, the spoilers are used for roll control.[1] During landings the pilot controlled the flight path with the stick, throttle and thumbwheel[2]
[[Spoilers]]
[[F-14 Lateral Control System]] – Shows spoiler gearing for DLC
Sources
- [1] tag:#_19820005275
- [2] J. W. Denham, “Project MAGIC CARPET: ‘Advanced Controls and Displays for Precision Carrier Landings,’” in 54th AIAA Aerospace Sciences Meeting, San Diego, California, USA: American Institute of Aeronautics and Astronautics, Jan. 2016. doi: 10.2514/6.2016-1770.
Backlinks
[[Airfoil Pitching Moment]]
[[Direct Lift]]
[[F-8 Crusader]]
[[F-14 Flight Control System]]
F-14 Wing