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).
Noting an increase in cylinder bore size and horsepower for a specific engine.
| Identifier | ExFiles\Box 138\3\ scan0307 | |
| Date | 23th December 1936 | |
| 1162 To D/L. from Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies} Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies}3/AP.23.12.36. 18.G.1V. - Reg. No.CH.9458. The engine No. is still U.7.S. but the cylinder bores were increased to 3.500" on 5.7.35. and the Horse Power is now 29.4. Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies} | ||