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).
Diagram of a gearbox silence test rig with a differential belt drive.
| Identifier | ExFiles\Box 155\3\ scan0031 | |
| Date | 4th October 1935 guessed | |
| GEARBOX SILENCE TEST RIG WITH DIFFERENTIAL BELT DRIVE. GEARBOX UNDER TEST. ADJUSTABLE TO ADJUST SLIPPING TORQUE. SECOND GEARBOX WITH IDENTICAL RATIOS AND ON SWINGING FRAME. ALTERNATIVE PULLEYS FOR DRIVE AND OVERRUN SELECTED BY DOG CLUTCHES. | ||