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 comparing measured and calculated spring rates for the BI and B50 front suspension systems.
| Identifier | ExFiles\Box 154a\2\ scan0281 | |
| Date | 24th March 1939 | |
| B I + B 50 FRONT SUSPENSION. FOR BI, ACTUAL SPRING RATE AT WHEEL = SPRING RATE AT SPRING / LEVERAGE SQUARED x .85/1 x 1.13/1 TORQUE EFFECT SPRING BENDING = 0.96 X SPRING RATE AT SPRING / LEVERAGE SQUARED B50 FIGURE IS 0.93X SPRING RATE AT SPRING / LEVERAGE SQUARED TO THESE THE SILENTBLOC RATING MUST BE ADDED. MEASURED RATING INCLUDES SILENTBLOCS MEASURED RATING AFTER SILENTBLOCS SUBTRACTED Y-Axis: MEASURED RATE AT WHEEL, LBS/IN. X-Axis: OVERALL CALCULATED RATE AT WHEEL, LBS/IN. DB{Donald Bastow - Suspensions} 24.3.39 DB{Donald Bastow - Suspensions} 24939 | ||