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).
Blueprint diagram for a torsional vibration indicator.
| Identifier | ExFiles\Box 6\1\ 01-page021 | |
| Date | 21th July 1923 guessed | |
| RECORDING PLATE WHICH SLIDES ON EXTENSION OF CRANK NUT. EXTN OF CRANK NUT. SPEC. CARRIER ATTACHED TO FLYWHEELS SHOWN IN THIS POSN FOR CLEARNESS. THIS PIVOT COUPLED BY FLYWHEEL. CARRIED BY PLATE. SLOT TO ALLOW 5° MOVEMENT. TORSIONAL VIBRATION INDICATOR. WASHER SEPARATING FLYWHEELS. WHITE METAL LINED. PLATE ATTACHED RIGIDLY TO HUB. FLYWHEELS FREE TO MOVE (NO FIX). LEVER ARMS. SPRINGS. BALANCE ARMS. SPRING LOADED SCRIBER. PATH OF SCRIBER. LIGHT SPRINGS. ATTACHED TO FLYWHEELS. ATTACHED TO PLATE. PLATE. AER | ||