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).
Spring chart for Phantom 'V' series to F2B models, correlating spring poundage to empty axle weight for front and rear axles.
| Identifier | ExFiles\Box 67a\2\ scan0167 | |
| Date | 23th August 1928 | |
| PHANTOM SPRING CHART 'V' SERIES TO F2B Left Chart: Y-Axis: SPRING POUNDAGE X-Axis: REAR AXLE WT CAR EMPTY. Lines: CONTINENTAL, AVERAGE, LIGHT Text Box: SPRINGING CHART ALLOWING FOR FOUR PASSENGERS TO ALLOW FOR LUGGAGE OR ANY ADDITIONAL WEIGHT ADD .75 OF THIS WEIGHT TO THE SPRING POUNDAGE. THUS 100LBS. OF LUGGAGE ON A 26CWT. NORMALLY SPRUNG REAR AXLE 2035LB SPRING Right Chart: Y-Axis: SPRING POUNDAGE X-Axis: FRONT AXLE WT CAR EMPTY. Lines: CONTINENTAL, NORMAL, LIGHT Text Box: SPRINGS ALLOWING FOR FOUR PASSENGERS ADDITIONAL LUGGAGE SHOULD NOT AFFECT FRONT SPRINGS Handwritten Note: Rm.{William Robotham - Chief Engineer} 23-8-28 | ||