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).
The effect of torque reaction dampers on a flexibly mounted engine to reduce vibrations.
| Identifier | ExFiles\Box 104\1\ scan0264 | |
| Date | 14th March 1935 | |
| x5005 To Sg.{Arthur F. Sidgreaves - MD} from Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux} c.c. to Wor.{Arthur Wormald - General Works Manager} c.c. to E.{Mr Elliott - Chief Engineer} c.c. to Ey. Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux}22/KW.14.3.35. 21-C-IV. Effect of Torque Reaction Dampers on the Flexibly Mounted Engine. With the flexibly mounted engine, uneven torque when idling causes the pulsations to be felt in the two front seats. To overcome this and not destroy the benefit of the flexible mounting we have produced and fitted two lightened type torque reaction dampers which will need a friction load of 2 lbs. at 4.750" radius to damp out the pulsations. It cures the unpleasant feeling of the engine movement in the front seats. With a view to using one damper only we have tried various loads on either side. It was found that the damper on the near side was more effective but the results have proved that to obtain the best result the two dampers must be fitted, the friction load not being high lessens the stress on the spring fingers and will remain more constant. With the 38% lightened dampers with the light friction load we have not been able to detect any booms or vibrations transmitted to the frame. Hs{Lord Ernest Hives - Chair}/G.W.Hancock. | ||