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).
Ordering and testing of taper valve springs for experimental cars.
| Identifier | ExFiles\Box 80\3\ scan0134 | |
| Date | 29th August 1912 | |
| Re Taper Valve Springs. TBB8/L29812. Mr Platford 29.8.12. With reference to further tests of the taper valve springs for which special valves are required. I understand a gross of these are on order, which are to be fitted to our experimental cars and kept under careful observation. | ||