Cost-reduction modifications for the Wraith II Gearbox.
| Identifier | ExFiles\Box 8\11\ 11-page061 | |
| Date | 2nd February 1937 | |
| 628 SECRET 1044 QRY BL. c.c. E. {Mr Elliott - Chief Engineer} Da. {Bernard Day - Chassis Design} Am. HPS. {Horace Percy Smith - Experimental Factory Mgr} E {Mr Elliott - Chief Engineer} /HDY. {William Hardy} 2/HP.2.2.37. Wraith II Gearbox. The following modifications have been suggested by the Experimental Department to reduce cost. Will you kindly instruct them for trial experiment- ally. (1) The three synchromesh cones at present made of Bronze to be made of cast iron. (2) The actuating sleeves for top and 3rd and 2nd speeds to be of cast iron. No alteration of dimensions need be made to the top and 3rd sleeve GW.168, but the 2nd speed sleeve should be modified on the lines shown by N.Sch.5022 for the Phantom III. (3) The stirrups for top and 3rd and 2nd speeds to be made of S/M instead of BZ. E {Mr Elliott - Chief Engineer} /HDY. {William Hardy} | ||
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).