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).
Specification for 40/50 chassis clearances for boxes and wheels mounted in wells on the running boards.
| Identifier | ExFiles\Box 50\2\ Scan204 | |
| Date | 5th December 1922 | |
| X.4302. Extract from Da {Bernard Day - Chassis Design} /Ev {Ivan Evernden - coachwork} 3/M5.12.22. X.4219. (5) 40/50 CHASSIS CLEARANCES X.4302. Boxes and wheels carried in wells on the running boards should not project through the latter more than 2½" below the under-side of the board, that is to say, they must have 2" more ground clearance than the engine flywheel guard, which is 10" above the ground. This is given in the coach-work memoranda, third edition 1920, page 14, item 31. Da {Bernard Day - Chassis Design} /Ev. {Ivan Evernden - coachwork} | ||