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).
Sketch with annotations for a damping scheme to address engine torque vibrations.
| Identifier | WestWitteringFiles\R\January1928-March1928\ 95 | |
| Date | 2nd March 1928 | |
| ORIGINAL HS.{Lord Ernest Hives - Chair} FROM DA{Bernard Day - Chassis Design}/HDY.{William Hardy} DA{Bernard Day - Chassis Design}/HDY{William Hardy}1/M2.3.28. ENGINE TORQUE VIBRATIONS. X8005 X6324 I give below a sketch of the damping scheme referred to in R3/M19.2.28., in order that you may know what is intended, and be able to test it temporarily should torque vibrations again come into prominence. [Handwritten annotations on diagram] DA{Bernard Day - Chassis Design}/HDY.{William Hardy} FULCRUM ON ENGINE ABOUT WHICH THE FRAME MOVES RELATIVE TO THE ENGINE DAMPER LOAD AS ON PHAN. OR GREATER IT MAY BE NECESSARY TO REMOVE THE GOVERNOR OR THE FAN PLATES WHICH MOVE WITH THE ENGINE ARE ATTACHED TO THE CRANKCASE AND IF NECESSARY ALSO TO THE SUPPORT TUBES BALL & N ON AXLE. BOTH BALL JOINTS HAVE SPRINGS SET UP ABOVE LOAD REQ'D TO OPERATE DAMPERS ENGINE MOUNTING AT FRONT AS ON STD. PHAN; AT REAR RUBBER TO BE USED AND IT MAY BE FOUND THAT MORE FLEXIBILITY THAN NOW USED IS AN IMPROVEMENT. THE FULCRUM SHOULD BE KEPT UP AS INDICATED, IN ORDER TO PREVENT DISTANCE A BECOMING TOO SMALL WITH CONSEQUENT HEAVY LOADS WGN. | ||