The required reduction in push rod length due to using Vauxhall cams on a Wraith III camshaft.
| Identifier | ExFiles\Box 7\8\ X 607 Camshaft-page07 | |
| Date | 26th June 1937 | |
| EXCRET. 607. To H.I.G. Copy to Mr Hales Mr Mr Rs {Sir Henry Royce's Secretary} /Swdl. {Len H. Swindell} E {Mr Elliott - Chief Engineer} /PSH/ARF.1/M.26.6.37. CAMSHAFT WITH VAUXHALL CAMS - WRAITH III. ---------------------------- Further to our memo. E {Mr Elliott - Chief Engineer} /PSH/ARF.1/M. 26.6.37, issuing the camshaft with Vauxhall cams for Wraith III, please note that the increase in base circle diameter from the standard Wraith dimension of 1.000" to 1.160" requires a reduction in push rod length of .080". Please instruct these new push rods to be made to suit the type of tappet which will be used with this camshaft. E {Mr Elliott - Chief Engineer} /PSH. | ||
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).