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 changes for the Bentley 5 front suspension coil spring, including plating, hardening, and finishing processes.
| Identifier | ExFiles\Box 100\1\ scan0250 | |
| Date | 23th June 1939 | |
| 446 To: By/HEB{H. Biraben} Roy{Sir Henry Royce}/AW RHC{R. H. Coverley - Production Engineer}/Wld/JF RHC{R. H. Coverley - Production Engineer}/M'C RHC{R. H. Coverley - Production Engineer}/WB{Mr Brazier/Mr Bell} Rm{William Robotham - Chief Engineer}/AFM{Anthony F. Martindale} H1/EA BY/NS{Norman Scott}5/MG.23.6.39 BENTLEY 5 FB.3826. FRONT SUSPENSION COIL SPRING Please note the thickness of cadmium plating called for on the above drawing is not considered by H1/EA to be a commercial proposition. Will you, therefore, specify Cadmium Plating .0005 thick (minimum). The following note should also be added: "To be examined for cracks and seams by the Makers, and then shot blasted with coarse round shot. Immediately after shot blasting to be covered with grease to prevent oxidization. Prior to plating at R.R. the springs are to be de-greased." The note "No Cyaniding" is to be altered to "No Cyanide Hardening". A copy of this note has been sent to Roy{Sir Henry Royce}/AW to enable him to get into touch with the Makers regarding future supplies. The stock in the Works not dealt with by Memo. BY/NS.{Norman Scott}1/MG.23.6.39 should be returned to the Makers. Will By/HEB{H. Biraben} please alter the drawing. A copy of Memo BY/NS.{Norman Scott}1/MG.23.6.39 is attached for RHC{R. H. Coverley - Production Engineer}/M'C and RHC{R. H. Coverley - Production Engineer}/WB.{Mr Brazier/Mr Bell} BY/NS.{Norman Scott} Al It is very important that the springs shall not be pickled in acid. I trust that this is clear on the drawings AFM{Anthony F. Martindale} | ||