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Aviation History
1952
1952 - 1179.PDF
25 APRIL 1952 FLIGHT 67 CONTROLS CABIN TEMPERATURE CONTROL IN THE DE HAVILLAND COMET As the Comet climbs away from London Airport, as she cruises high above the weather and as the let-down is made in tropical heat, the cabin air will remain at a steady comfortable temperature which may be instantly adjusted to meet passenger requirements. The Comet is fitted with Teddington Controls' Cabin Temperature Controller, type FHR. This is an electrical system, employing a high gain electronic amplifier for maximum sensitivity. Thermal feed back is used to obtain flexibility of control and a thermal element provides an automatic reset. The system works from 115 v. A.C. single phase and the output controls are rated at 12 amps, for direct control of the 24 v. system actuators. The entire control equipment weighs only 5 lb. AUTOMATIC C<£^LS TEDDINGTON CONTROLS LTD., CEFN COED, MERTHYR TYDFIL, SOUTH WALES. Mcrthyr Tydfil 666 Low Pressure Polyester Resin and Glass Fabric laminates forming Tail Fin Tip and Wing Tips also piping for de-icing system, radio aerial panels and trunking fan casings, etc. for air-conditioning system in "Comet" were made with " BEECHVALLEY " 100% Pure Glass Fabric supplied by GLASS FABRICS LIMITED TO MINISTRY OF SUPPLY SPECIFICATION DTD.797. 2I3 West Campbell Street, Glasgow, C.2. BEECHVALLEY MILL. DUNGANNON, NORTHERN IRELAND.
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