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Aviation History
1954
1954 - 2133.PDF
£NVmONM£NT momm IN AIRCRAFT sasOT iftaMs The particular environment problems that affect electric cables in aircraft have been a major concern of BICC for many years. Our designers, who are backed by a research organization with facilities unexcelled in the cable industry, have helped to provide many of the answers. Four of the conditions most frequently encountered in modern aircraft are listed below, together with the BICC cables recommended to withstand them. There are two main types of BICC cables intended for wiring to withstand high ambient temperatures. 'Glasil' cables, insulated with silicone rubber for service up to 150 C. 'Glasef' cables, insulated with P.T.F.E. for service up to 250 C. ! BICC ' Unifire' cables have recently been introduced for wiring fire detection and control apparatus. They are type tested to withstand open flame at 1,100 C. for not less than five minutes. The composite insu lation consists of glass and asbestos impregnated with silicone compounds. Where flexibility at low tem perature is required, standard 'Pren' aircraft cables give satisfactory service at — 30 C. Both 'Glasil' and 'Glasef cables retain their flexibility at temperatures as low as — 75°C. @3lL (Synthetic) BICC ' Nypren ' cables have a nylon sheath to resist the deleterious effects of the ester- based lubricating oils used m jet engines. They are otherwise similar to ' Pren' cables, having an inner glass braid and P.C.". insulation. 'Glasef' cables also have a hign resistance to these lubricants. If you are encountering environment problems in connection with aircraft wiring circuits, our specialist engineers will be pleased to discuss the choice of suitable types of cable with you. Further information on cables referred to above is contained in the following BICC Publications: ' Glasil' No. 334 'Glasef'No. 319 ' Unifire' No. 344 4 Pren' No. 331 * Nypren' No. 345 BICC AIRCRAFT WIRINt CABLES ^ $% BRITISH INSULATED CALLENDER'S CABLES LIMITED - '.SMMI'MJ 21 Bloomsbury Street, London, W.C.I. MUS 1600 m •ki
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