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).
Diagram and specifications for a 40/50 model stub axle.
| Identifier | ExFiles\Box 49\4\ Scan190 | |
| Date | 24th September 1923 guessed | |
| F. {Mr Friese} 69217 F. {Mr Friese} 6931 X3214 40/50 Stub axle. Angle of camber 2 1/2° Tilt of pivot 5° Total tilt of stub axle axis to pivot axis 7 1/2°. | ||