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).
The turning circles for a 40/50 HP long chassis with a 150' wheelbase.
| Identifier | ExFiles\Box 20\5\ Scan030 | |
| Date | 12th July 1923 | |
| R.R. 403A (40 H) (SL 42 12-7-23). J.H.,D.{John DeLooze - Company Secretary} EXPERIMENTAL REPORT. Expl. No. 980 REF: Hs{Lord Ernest Hives - Chair}/Rn{Mr Robinson}/LG29.1.24.3 40/50 HP. LONG CHASSIS - WHEELBASE 150". TURNING CIRCLES. [Diagram showing front wheels turned, with annotations] Left Wheel annotation: TRACK 42º 30' L.H Right Wheel annotation: TRACK 36º R.H We adjusted the steering stops until there was 1/4" clearance between the tyre and side steering tube on the off side, and the tyre and spring gaiter on the near side. The resultant turning circles were :- R.H. 50 1/2 ft. L.H. 44 1/2 ft. The locks producing these turning circles were :- R.H. 36º L.H. 42º 30' Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} | ||