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).
Note on a method for observing gear functionality.
| Identifier | ExFiles\Box 64\4\ scan0124 | |
| Date | 12th December 1928 | |
| Contd. -5- EFCL/T12.12.28. Further note. The functioning of the gears was readily observed by means of a hole that had been cut in the gear case on the underside, a pea lamp suitably supported with shield, and a mirror. Three persons could view the operation simultaneously. EFC. | ||