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).
Brief acknowledgement memo regarding an exhaust heated throttle.
| Identifier | ExFiles\Box 14\6\ Scan125 | |
| Date | 7th December 1929 | |
| S/W +7230. C13/C7.12.29 Exhaust Heated Throttle. Thanks for your Hsl/MJ6.12.29 and I note the position. C. | ||