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Aviation History
1959
1959 - 2290.PDF
11 SEPTEMBER 1959 FLIGHT 57 HOB SON CONSTANT SPEED ALTERNATOR DRIVES are now specified for the AIRCO D.H. 121 JET AIRLINER The outstanding advantages inherent in this ingenious design further exemplify the Company's aim in keeping pace with progress. In this aircraft, described as the ultimate in subsonic speed combined with the best possible operating economy, the entire electrical generating capacity is dependent upon its constant speed drives, so that reliability and a long life between overhauls are of vital importance. Designed specifically for civil aircraft duties, HOBSON Constant Speed Alternator Drives achieve these essential qualities by their novel construction permitting the use of a transmission oil pressure of only 500 p.s.i. In addition, a unique pump off-loading system reduces the pump transmission pressure to 50 p.s.i. when the aircraft is cruising. H ' M LIMITED - FORDHOUSES • WOLVERHAMPTON
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