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).
Comparison of vibration and connecting rod length between Goshawk I and Goshawk 11 engines.
| Identifier | ExFiles\Box 72\1\ scan0153 | |
| Date | 1st May 1924 guessed | |
| -2- con. rods. It will be seen that all of the engines enumerated are still on the comparatively flat part of the curves. Goshawk 1. is said to be free of the vibration which occurs at very high speeds on Goshawk 11. The difference in con. rod length between these two engines is not great. E.{Mr Elliott - Chief Engineer} | ||