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).
Rig for testing model cranks.
| Identifier | ExFiles\Box 63\4\ scan0065 | |
| Date | 12th February 1930 guessed | |
| RIG FOR TESTING MODEL CRANKS This ball end is placed 3.000 eccentric GIVING A 6.000 STROKE 44.000 8.125 CTRS CRANKSHAFT PLUNGER BLOCK SERRATED COUPLING 4 to 5 lbs FLYWHEEL U.648 HARDING'S TACHOMETER DRIVEN FOR READING NUMBER OF REVERSALS | ||