From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Specifications for various types of cables, detailing core size, diameter, dielectric, and protective covering.
| Identifier | ExFiles\Box 168b\2\ img160 | |
| Date | 5th November 1928 guessed | |
| -2- Contd. Not used on 20 H.P. chassis. Specification 261A. CORE SIZE. Single 70/36 OUTSIDE DIA. Maximum .187" DIELECTRIC. One layer pure rubber, one layer white vulcanizing rubber and one layer black vulcanizing rubber. Radial thickness of pure rubber .006". Total radial thickness of rubber .030". PROTECTIVE COVERING. Single layer of varnished cable cloth, braid of polished cotton yarn and treated with Gloy adhesive during braiding to prevent slipping or fraying of braiding material. Various colours. Specification 262A. CORE SIZE. Single 23/35. OUTSIDE DIA. Maximum .145" DIELECTRIC. One layer pure rubber, one layer white vulcanizing rubber, and one layer black vulcanizing rubber. Radial thickness of pure rubber .006". Total radial thickness of rubber .030". PROTECTIVE COVERING. Single layer of varnished cable cloth, braid of polished cotton yarn and treated with Gloy adhesive to prevent slipping or fraying of braiding material. Colour as specified. Specification 266. CORE SIZE. Single 90/36 OUTSIDE DIA. Maximum .200" DIELECTRIC. One layer pure rubber, one layer of white vulcanizing rubber and one layer of black vulcanizing rubber. Radial thickness of pure rubber .006". Total radial thickness of rubber.030". PROTECTIVE COVERING. Single layer of varnished cable cloth, braid of polished cotton yarn and treated with Gloy adhesive to prevent slipping or fraying of braiding material. Colour as specified. | ||