The F-111 Aardvark, or TFX
Practical variable sweepback came along just in time for the all-service TFX concept, which later became the Air Force’s F-111 (Figure 16.1). The F-111 uses the
Figure 16.1 The F-111 with wings fully swept at 72.5 degrees and fully unswept at 16 degrees.
retractable glove vane reduces excessive longitudinal stability with the wings fully swept back. (From Loftin, NASA SP 468, 1985)
Alford-Polhamus-Wallis rotation-only mechanism. The wing sweep range is 16 to 72.5 degrees, with normal subsonic cruise at a sweep of 26 degrees. Triply redundant three-axis stability augmentation is used. There are no particular stability and control problems with this machine.