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 charting Packard yoke movement and deflection due to brake torque.
| Identifier | ExFiles\Box 100\1\ scan0165 | |
| Date | 10th June 1918 guessed | |
| PACKARD YOKE MOVEMENT DUE TO BRAKE TORQUE DEFLECTION - INS. .040 .030 .020 .010 PULL ON FRONT END OF CAR - LB. 200 400 600 800 1000 YOKE BENDING 'A' BACKWARD MOVEMENT OF TORQUE ARM 'E' DISTORTION OF PIVOT PIN ETC 'B' NEEDLE BEARING PLAY 'C' TWIST IN NECK 'D' | ||