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 plotting deflection against total load for Lancia reversed leaf springs.
| Identifier | WestWitteringFiles\P\2July1926-September1926\ Scan043 | |
| Date | 13th 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. 8 6 4 2 0 300 600 900 1200 1500 1800 | ||