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).
Engine torque reaction and vibration testing with a modified rubber block engine mounting.
| Identifier | ExFiles\Box 68\1\ scan0006 | |
| Date | 25th January 1928 | |
| L8430 Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}/LG25.1.28. LG34 +8005 TORQUE REACTION. Condition of car as in Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}/LG24.1.28. Rubber block fitted to dash and torque taken through this, slight improvement noticeable but not very marked. Engine then single point mounted at the front, rubber mountings at the rear left as before. [Drawing of a lever from the cylinder head connected to a rubber block on the dash] LEVER ON CYL: HEAD RUBBER BLOCK ON DASH Torque reaction very appreciably better resolving itself into two periods, the worst at 16 m.p.h. felt up the steering column which vibrates as a whole. The second at 22 m.p.h. felt on the dash but does not cause a forced vibration on the column. Coupling the rubber block up makes an appreciable difference to the visible engine movement but does not reduce the vibrations felt in the column or driving seat to any extent. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||