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).
Summary table of test modifications and their results for the 30-MX and Buick models.
| Identifier | ExFiles\Box 94\1\ scan0228 | |
| Date | 2nd November 1935 | |
| -8- Hs{Lord Ernest Hives - Chair}/Ony.7/KM. 2.11.35. | CAR | TEST | RESULT | |---|---|---| | (26) 30-MX{John H Maddocks - Chief Proving Officer} | Joining engine and box by steel plates top and bottom to make box and engine rotation in frame under torque the same amount. | No improvement but gear noise greatly increased. | | (27) Buick | Altering sliding piece from - [diagram] to - [diagram] | Slight chunking noticeable at low speeds. | | (28) 30-MX{John H Maddocks - Chief Proving Officer} | Layrub front propellor shaft joint | Very slight improvement. | | ||