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).
Graph of torque on front wheels versus tangential pull on the steering wheel for various chassis.
| Identifier | ExFiles\Box 154\3\ scan0045 | |
| Date | 22th September 1927 | |
| Torque on Front Wheels lbs ins., Tangential Pull on Steering Wheel lbs, 336 HH, 2 start 17" Wheel, Average 6 production chassis, 293 RM{William Robotham - Chief Engineer}, 292 RM{William Robotham - Chief Engineer}, Minimum Parking Torque on Smooth Road, Maximum Comfortable Steering Effort, SEP 23 1927, OBSOLETE, KEUFFEL & ESSER CO., NEW YORK, NO. 334 C, J.M.H. 9/22/27 | ||