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 plotting the sideways movement of a Packard yoke against wheel load.
| Identifier | ExFiles\Box 100\1\ scan0145 | |
| Date | 9th May 1938 guessed | |
| PACKARD MOVEMENT OF YOKE SIDEWAYS PLOTTED AGAINST WHEEL LOAD Y-AXIS: INCHES DEF. .040 .030 .020 .010 0 X-AXIS: WHEEL LOAD LB. 0 300 600 900 1200 1500 DATA LINES: SIDEWAYS MOVEMENT OF YOKE C FIDGETING IN JOINT OF LOWER LEVER TORQUE ARM X, E NEEDLE BEARING PLAY B1 YOKE BENDING A BENDING OF PIVOT ETC B2 TWISTING NECK OF LOWER LEVER D | ||