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 favoured and avoided design combinations for a steering system.
| Identifier | ExFiles\Box 17\3\ Scan139 | |
| Date | 22th March 1927 guessed | |
| contd :- -2- you to pick out the best combination. I favour - Very small extra complication and cost. (a) Just irreversible worm when worn to good bedding. (b) Damping by ball ends and pendulum lever. (c) Slight spring return on steering column. (d) Correct geometry. (e) Increased lean of pivot 3°. I should like to avoid the necessity of - (X) Friction on steering column because it will not help damping. (Y) Hydraulic damper because of the cost and weight etc. R.{Sir Henry Royce} | ||