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).
On steering wheel movement specifications for full lock.
| Identifier | ExFiles\Box 20\5\ Scan010 | |
| Date | 6th September 1909 | |
| R.R. 148 (20 H) (C. 898. 26.2.09) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 6740. X426 1900. [700 crossed out] Steering Movement of wheel for full lock. Standard for 1900 cars & 1909. full lock - wheel turns - 1 full turn 17" wheel (except 2 1/4" - periphery). on special - 3 thread. as tested on slow movement. for full lock - 1 1/4 turns + 2" CP 6/9/09 | ||