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).
The Spectre steering box for testing Marles cams and rollers and its proposed use on the 25 HP model.
| Identifier | ExFiles\Box 95\1\ scan0172 | |
| Date | 6th June 1935 | |
| To RHC.{R. H. Coverley - Production Engineer} X 3170 Hs{Lord Ernest Hives - Chair}/FJH.{Fred J. Hardy - Chief Dev. Engineer}6/KW.6.6.35. SpectreCodename for Phantom III Steering Box for Testing of Marles Cams & Rollers. Re our memo. ref. Hs{Lord Ernest Hives - Chair}/FJH.{Fred J. Hardy - Chief Dev. Engineer}20/KW.4.6.35, asking you to build up a steering box so that the Adamant Engineering Co. can try the cams and rollers for themselves. As we propose to use the SpectreCodename for Phantom III gear on the 25 HP., we shall require both left and right hand cams, and accordingly we shall require both left and right hand rockershafts for the above steering box. Will you please make both rockershafts. Hs{Lord Ernest Hives - Chair}/FJH.{Fred J. Hardy - Chief Dev. Engineer} | ||