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

The F-111 Aardvark, or TFX

Figure 16.1 The F-111 with wings fully swept at 72.5 degrees and fully unswept at 16 degrees.

(USAF photos)

The F-111 Aardvark, or TFX

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.

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