Note regarding tyre noise on the 20/25 HP model.
| Identifier | ExFiles\Box 157\1\ scan0254 | |
| Date | 3rd December 1935 | |
| W/S {Derby Works / Sales} - Cx. {Major Len W. Cox - Advertising Manager} X1332 Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} 14/KW.3.12.35. Tyre Noise - 20/25 HP. Cx. {Major Len W. Cox - Advertising Manager} 5/KW.29.11.35. We will give you the latest information on this subject when you are here this week. Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} | ||
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).