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F-111
The F-111 entered the USAF in 1981. It is a supersonic all-weather attack
aircraft with high variable-sweep wing (the first in production in the world).
The variable-sweep wings' limits are of 16
°
(extreme forward) and 72.5
°
(swept back). To take off the limit is 16
°
, for landing - 26
°
, and for the supersonic
flight - 72
°
.
Basic features of the F-111 include also side-by-side seating for the pilot and
right-seat navigator, large main gears with low-pressure tires for landing on soft
strips, very great internal fuel capacity, and emergency escape by jettisoning the
entire crew compartment, which has its own parachutes and can serve as a survival
shelter or boat.
The aircraft is equipped with a terrain-following radar (TFR) (РЛС
обеспечения полета с огибанием рельефа местности) which permits the plane to
fly over hills, mountains and steep-sided valleys in blind conditions, in blizzards or
by night, holding a steady 200 ft distance from the ground at high-subsonic speed.
According to the US press the aircraft possesses good maneuverability at low
speeds and has short take-off and landing distances. This is possible due to auxiliary
wing control surfaces: flaps, slats, spoilers and others.
The aircraft's tail unit includes a vertical fin and all-movable stabilizer.
