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).
List of test points and considerations for a vehicle's jacking system.
| Identifier | ExFiles\Box 154a\3\ scan0219 | |
| Date | 27th March 1936 guessed | |
| JACKING SYSTEM. (1) Weight of jacking system. (2) Speed of return of hydraulic jacks. (3) Strength, rocking car on gradient. (4) Ground clearance. (5) Operation with tyre off the rim. (6) Oil leaks with car left standing on the jacks. (7) Accessibility. Connections, etc. Bump and 5,000 miles of untarred road at speed. 500 jacks up in lab. test. | ||