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).
Comparison of standard and proposed specifications for 20 HP front springs.
| Identifier | ExFiles\Box 106\1\ scan0177 | |
| Date | 1st May 1930 | |
| X5410. FOR FILES. RM.{William Robotham - Chief Engineer} MAY 1930. 20 HP. FRONT SPRINGS. Initial Deflection 2.250 } Standard. Maximum Bump 1.950 } Initial Deflection 4.00" } Proposed. Maximum Bump 3.00" } Free Camber 2.250 Pos. } Standard. Loaded Flat. } Free Camber 5.00" Pos. } Proposed. Loaded 1.00" Pos. } Rm.{William Robotham - Chief Engineer} | ||