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 sheet for steering turning circles of the 1550 chassis.
| Identifier | ExFiles\Box 20\5\ Scan003 | |
| Date | 18th March 1911 | |
| H.R. 138a (100 T) R.H. 89. 23-7-20. G 2769 X. 426. Steering. Turning Circles. 1550 chassis. Off Side 46 ft 6" Near side. 44 ft. 6". Centre of wheel track taken as outside radius. E.P. 18.3.11. E.H. 16.3.11. | ||