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).
Cost estimate concluding a 20HP Goshawk engine would cost at least 85% of a similar 40/50HP engine.
| Identifier | ExFiles\Box 18\6\ Scan209 | |
| Date | 1st November 1920 guessed | |
| -2- It would appear to the Works Committee, after having gone into all these figures carefully, that at a fair estimate a 20HP. engine of the Goshawk type, would cost anyway at least 85% of the cost of an engine of a similar design, of the 40/50HP. type. | ||