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).
With annotated diagrams detailing design modifications for a side wheel carrier.
| Identifier | WestWitteringFiles\T\March1929-December1929\ Scan042 | |
| Date | 22th March 1929 | |
| DA.{Bernard Day - Chassis Design} FROM R.{Sir Henry Royce} (At Le CanadelHenry Royce's French residence.) SECRET R1/M22.3.29. REC'D AT WW. 26.3.29. Copy to SS.{S. Smith} " WR. (Struck through) " HS.{Lord Ernest Hives - Chair} SS.{S. Smith} SIDE WHEEL CARRIER. X7600 Re. N. sch. 2845. we think the wheel should be carried in one inch for the sake of safety in catching a passing vehicle. [Diagram Annotation 1]: Not so high and no washer. [Diagram Annotation 2]: Clean up with end mill before polishing. [Diagram Annotation 3]: Two wings of the proportions shewn for turning and inverting position of disc. [Diagram Annotation 4]: These prongs should be made to come further through the slot which probably requires more clearance on the threaded end with the handle The double wheel carrier on 21-EX. does not work well owing to the prongs not reaching into the slot. R.{Sir Henry Royce} | ||