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).
Data table showing measurements of Packard yoke movement under various loads, noting hysteresis effects.
| Identifier | ExFiles\Box 100\1\ scan0142 | |
| Date | 9th May 1938 guessed | |
| PACKARD YOKE MOVEMENT. LOAD. TOP OF YOKE REL.TO FRAME. A.{Mr Adams} BENDING OF YOKE A.{Mr Adams} NEEDLE BEARING CLEARANCES & BENDING OF PIVOT PIN AND HOUSING B1 B2. SIDEWAY MOTION OF YOKE C. ROTATION OF LOWER LEVER E, X. TWIST OF LOWER LEVER. D.{John DeLooze - Company Secretary} 300 lb. 0 0 0 (No hysteresis) 0 0 0 0 0 .001 0 0 600 lb. .020 .025 .003 .007 .009 .008 .011 .001 .004 .0005 900 lb. .041 .050 .007 .0a1 .013 .014 .017 .003 .009 .001 1200 lb. .064 .069 .011 .016 .018 .020 .022 .008 .013 .0015 1500 lb. .085 .086 .014 .020 .022 .025 .026 .020 .021 .0025 The two rows of figures in each column indicate hysteresis effects. | ||