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).
Performance graph of deflection versus load for Lancia reversed leaf springs.
| Identifier | ExFiles\Box 21\2\ Scan026 | |
| Date | 10th August 1928 guessed | |
| LANCIA REVERSED LEAF SPRINGS. 3 REVERSED LEAVES. REVERSED LEAVES. DEFLECTION INS. TOTAL SPRING LOAD LBS. EXTN. COMPRN. INTERNAL FRICTION APPROX 150 LBS. | ||