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 stress on the main leaf of a BV road spring.
| Identifier | ExFiles\Box 100\1\ scan0240 | |
| Date | 19th May 1939 guessed | |
| MAIN LEAF OF BV ROAD SPRING FB 4364 MAX. STRESS. lb/sq" STRESS RANGE lb/sq" APPROX. POINT OF BREAKAGE STRESS RANGE THEORETICAL STRESS STRESS STRESSES IN MAIN LEAF DUE TO AN OSCILLATION OF 7.25" FROM 3.75" NEGATIVE CAMBER TO 3.5" POSITIVE CAMBER | ||