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).
Front Suspension Spring Rate for B.V. & B.50 models.
| Identifier | ExFiles\Box 100\1\ scan0232 | |
| Date | 30th March 1939 | |
| HH6 Rm.{William Robotham - Chief Engineer} Da{Bernard Day - Chassis Design}/DB.{Donald Bastow - Suspensions}10/G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 30.3.39 Front Suspension Spring Rate B.V. & B.50. file 1306 | ||