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).
Insulation dimensions for 'Goshawk II' electrical fittings, as specified by Mr. Royce.
| Identifier | ExFiles\Box 45\4\ Scan323 | |
| Date | 20th October 1921 | |
| X4081 To By.{R.W. Bailey - Chief Engineer} from E c. to CJ. c. to Wor.{Arthur Wormald - General Works Manager} c. to Da.{Bernard Day - Chassis Design} c. to EFC. X.4081 - RE "GOSHAWK II" ELECTRICAL FITTINGS. x4410 Regarding the question of insulation on "Goshawk II" electrical fittings, Mr. Royce has recently considered the dimensions which he thinks allowable, and has now decided that the face insulation may be bakelite micarta sheet .062" thick, and the bushings bakelite micarta tubes .031" thick, as in sketch. The adoption of these new dimensions should be per-missible in the reduced scale switchbox that you are drawing, and may be of help in producing this design. Referring to the cutout and distribution board, these are to be combined on the ppe mounting, as mentioned in a previous memo, and the design is approaching completion. E.{Mr Elliott - Chief Engineer} | ||