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).
Confirming a 20% aero engine duty for a diesel engine following a telephone conversation.
| Identifier | ExFiles\Box 133\3\ scan0011 | |
| Date | 4th November 1938 | |
| D/BP. from Rm.{William Robotham - Chief Engineer} Rm{William Robotham - Chief Engineer}3/R.4.11.38. re: Diesel Engine. D/BP5/MW.1.11.38. We confirm telephone conversation that this engine is subject to aero engine duty of 20%. Rm.{William Robotham - Chief Engineer} | ||