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 internal friction of a Lancia rear spring by plotting load against deflection.
| Identifier | ExFiles\Box 67a\1\ scan0189 | |
| Date | 26th April 1926 | |
| LANCIA REAR SPRING INTERNAL FRICTION DEFLECTION IN INS INS 7.0 6.0 5.0 4.0 3.0 2.0 1.0 LOAD IN LBS 200 400 600 800 1000 1200 1400 1600 LBS EXTN. COMPRN ROLLS-ROYCE, LIMITED PRINT ROOM, 26 APR 26 DERBY | ||