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).
Diagram illustrating the standard heights for front and rear axle jacks on a 40/50 HP Chassis.
| Identifier | ExFiles\Box 26\3\ Scan035 | |
| Date | 9th February 1927 guessed | |
| 40/50 H.P. CHASSIS. STANDARD HEIGHTS FOR JACKS. FRONT AXLE. 14" FULLY INFLATED TYRE 8.5" BARE RIM REAR AXLE. 16.5" FULLY INFLATED TYRE 11" BARE RIM L.113X X31.7 | ||