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 detailing performance characteristics for proposed 50-inch springs under various loads.
| Identifier | ExFiles\Box 154a\2\ scan0355 | |
| Date | 22th June 1941 | |
| PROPOSED 50" SPRINGS., PAGE 7, ERROR IN STANDING HEIGHT - INCHES., +2, +1, 0, -1, -2, SPRING DEFLECTION - INCHES, 9, 8, 7, 6, NORMAL SPRING LOAD - LB., 900, 1000, 1100, 1200, 132 LB/INCH SPRING, 148 LB/INCH SPRING, 166 LB/INCH SPRING, PACKING .4" THICK INSERTED BETWEEN SPRING & AXLE FOR THESE LOAD RANGES., PAGE 7, Rm{William Robotham - Chief Engineer} / G.B. / A1, 22/6/41 | ||