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 selection of 'Champion' plugs for the 40/50 HP model.
| Identifier | ExFiles\Box 35\3\ scan 155 | |
| Date | 4th December 1924 | |
| X4196 Hs.{Lord Ernest Hives - Chair} C. Roy.{Sir Henry Royce} BY9/H.{Arthur M. Hanbury - Head Complaints} 4. 12. 24. "CHAMPION" PLUGS. 40/50 HP. The question of the type of plug is one which you are best fitted to deal with from every point of view. I am quite happy to leave the issue in your hands entirely. BY.{R.W. Bailey - Chief Engineer} Ry | ||