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).
Blueprint graph comparing measured versus calculated spring rates for a front suspension system.
| Identifier | ExFiles\Box 154a\4\ scan0112 | |
| Date | 31th March 1939 guessed | |
| BI - 8.30 FRONT SUSPENSION. ACTUAL SPRING RATE AT WHEEL = SPRING RATE AT SPRING x (LEVERAGE SQUARED) BED. FIGURE IS 0.93 x (SPRING RATE AT SPRING / LEVERAGE SQUARED) TO TRACE THE SILENTBLOC RATING MUST BE ADDED MEASURED RATE AT WHEEL LBS/IN. OVERALL CALCULATED RATE AT WHEEL, LBS/IN. MEASURED RATING INCLUDES SILENTBLOCS MEASURED RATING AFTER SILENTBLOCS SUBTRACTED | ||