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).
Measurements of spring load and deflection for a Bentley III.
| Identifier | ExFiles\Box 100\1\ scan0048 | |
| Date | 30th September 1937 guessed | |
| Bentley III Load on Springs in normal position N.S.F. 768 lbs. O.S.F. 784 lbs. Initial Deflections N.S.F. 5.34" O.S.F. 5.03" Top lever 6 1/2° down | ||