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).
Specification of cables for the Goshawk wiring system.
| Identifier | ExFiles\Box 45\3\ Scan168 | |
| Date | 11th February 1922 | |
| 11th February, 1922. X.4075. SPECIFICATION OF CABLES FOR R.R. GOSHAWK WIRING SYSTEM. ---ooo--- Specification 1. Cable. 40/36's tinned copper, high conductivity. Insulated. (Total radial thickness of rubber including pure rubber, white & black vulcanised rubber .035. 1st. Thin layer of pure rubber. 2nd. Layer of white vulcanised rubber. 3rd. Layer of black vulcanised rubber. 4th. Layer of impregnated thin cotton braiding of desired colour. Total overall dia. not to exceed .187. Specification 2. Cable. 70/36's tinner copper, high conductivity. Insulated. (Total radial thickness of rubber including pure rubber, white & black vulcanised rubber .035. 1st. Thin layer of pure rubber. 2nd. Layer of white vulcanised rubber. 3rd. Layer of black vulcanised rubber. 4th. Layer of impregnated thin cotton braiding of desired colour. Total overall dia. not to exceed .187. Specification 3. Cable. 12 - 7/25's tinned copper, high conductivity. Insulated (Total radial thickness of rubber including pure rubber, white & black vulcanised rubber .050. 1st. Thin layer of pure rubber. 2nd. Layer of white vulcanised rubber. 3rd. Layer of black vulcanised rubber. 4th. Layer of thin tape. 5th. Layer of impregnated braiding, black in colour. Overall dia. not to exceed .425. Specification 4. Cable. 23/36's tinned copper, high conductivity. Insulated. (Total radial thickness of rubber including pure rubber, white & black vulcanised rubber .035. 1st. Thin layer of pure rubber. 2nd. Layer of white vulcanised rubber. 3rd. Layer of black vulcanised rubber. 4th. Layer of impregnated thin cotton braiding of desired colour, viz. orange. Total overall dia. not to exceed .130. WHA 11/2/22 | ||