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).
Issues with springs and tappets, including a material specification for Silchrom.
| Identifier | ExFiles\Box 173\4\ img194 | |
| Date | 7th December 1935 guessed | |
| An additional tufted spring like we are to most not a fit. The plunger has .0003 to .0005" clearance and a sharp bottom edge to prevent shaking when dirty. Jardin sand on Halford tappet needs absolutely air free oil or turner's the other way up. * They have a very clever tappet for aeroplanes which was wax up of which I have a drawing & notes of a sample. The Silchrom made to 20 % Cr{Mr Cra???ster / Mr Chichester} 2 1/2 % Ni 0.7 % C 2 % Si 0.6 % Mn were still satisfactory GR{George Ratcliffe}? | ||