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).
Specification note on the design of rods and the lining of mild steel bushes.
| Identifier | ExFiles\Box 103\2\ scan0172 | |
| Date | 11th January 1931 guessed | |
| (2) split pin and a groove between the hexagon and collar for light-ness and ease of milling. Mild steel bushes for all these rods will be lined with standard babbit or Hall's anti-friction according to the result of tests in progress. R.{Sir Henry Royce} | ||