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).
Photograph of a Servo Worm Gear from a Bentley Dynamometer Chassis after a 100-hour test.
| Identifier | ExFiles\Box 87\5\ scan0091 | |
| Date | 10th October 1938 guessed | |
| BENTLEY DYNAMOMETER CHASSIS. Ex.29872 Servo Worm Gear in R.R.56 Material after completing 100 Hrs. Test. | ||