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 the test results for the Myth rear suspension with a shackle and without axle insulators.
| Identifier | ExFiles\Box 110\3\ scan0069 | |
| Date | 22th April 1941 | |
| TEST OF MYTH REAR SUSPENSION WITH SHACKLE WITHOUT AXLE INSULATORS. 41.04" 5" 44" WHEN FLAT TOP RUBBER 5" LONG x 3/8" THICK BOTTOM " 7" " x 5/8" " SPRUNG LOAD - LB VIRTUAL DEFLECTION - INCHES SUSPENSION RATE LB/INCH DISTANCE FROM FULL LOAD POSITION - INCHES. VIRTUAL DEFLECTION CALCULATED MEASURED LOAD MEASURED CALCULATED RATE MEASURED "" CALCULATED AS DRAWN KERB WT. +6 CWT. MECH. FLAT TESTS BY Rm{William Robotham - Chief Engineer} / Elm. Rm{William Robotham - Chief Engineer} / C.B. 22/4/41 | ||