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 showing the relationship between deflection and total spring load for Lancia reversed leaf springs.
| Identifier | ExFiles\Box 42\3\ Scan206 | |
| Date | 10th August 1926 guessed | |
| LANCIA REVERSED LEAF SPRINGS. 3 REVERSED LEAVES REVERSED LEAVES DEFLECTION INS. TOTAL SPRING LOAD LBS EXTN COMPRN INTERNAL FRICTION APPROX 150 LBS | ||