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 the torsional stiffness of different frame configurations under load.
| Identifier | WestWitteringFiles\S\June1928-August1928\ Scan064 | |
| Date | 5th July 1928 guessed | |
| FOR THESE TESTS THE FRAME WAS SUPPORTED AT THE REAR ON JACKS THEREBY ELIMINATING THE FLEXIBILITY OF THE REAR SPRINGS. LOAD LEGEND: ______ STANDARD FRAME _ _ _ _ '' PLUS X MEMBER UNDER RADIATOR _._._. '' PLUS 4 POINT MOUNTING FIGURES REPRESENT MEAN OF FRAME TWISTED FIRST CLOCKWISE AND THEN ANTI - CLOCKWISE. Y-AXIS: TORQUE LBS. FT. (0, 250, 500, 750, 1000, 1250, 1500) X-AXIS: FRAME TWISTED FROM HORIZONTAL DEGREES θ (0, .5°, 1.0°, 1.5°, 2.0°) Left Margin Handwriting: Filing Space | ||