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Aviation History
1959
1959 - 1679.PDF
Flight, 72 June 1959 Products from SMITHS O O AVIATION DIVISION This is the third of a series of six insets appearing in this journal during the next eight months. The next section will be appearing 14th August, 1959. AUTOPILOT Smiths S.E.P.2 Autopilot Flight Panel The S.E.P. 2, a modern electric autopilot, is designed to control modern transport aircraft through all stages of flight. The S.E.P. 2 provides full flight stabilization and manoeuvring control in both pitch and azimuth—and facilities for locking to constant heading, indicated airspeed and pressure altitude, and coupling to V.O.R. and I.L.S. with fully automatic approach. Heading Selector The Heading Selector controls the heading of the aircraft when under autopilot. Heading can also be preselected; the aircraft will hold its original heading until an "alter heading" button is pressed. The Heading Selector is in the form of a compass repeater, with a heading selector knob at the bottom right hand corner. Gyro Unit The S.E.P. 2 operates on the rate/rate principle. Only rate gyros are used. This system provides very smooth control, and the rugged rate gyros give a very long life. Currently 3,000 hours between overhauls is achieved on all units of the S.E.P. 2, while some non-moving parts have a considerably longer life. Locking Unit The S.E.P. 2 uses magnetic amplifiers throughout. These ensure long life and reliability. The rack mounted locking unit contains all the circuits and amplifiers associated with airspeed and height locking, and radio coupling.
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