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).
Experiments concerning low-speed torque reaction vibrations in 40/50 HP and 20 HP chassis.
| Identifier | ExFiles\Box 74\4\ scan0107 | |
| Date | 25th October 1923 | |
| X4604 142 Expl: Dept: Messrs. Rolls-Royce Ltd., Nightingale Rd., Derby, England. Hs{Lord Ernest Hives - Chair}2/LG25.10.23 Messrs.Rolls-Royce (America)Inc., Springfield, Mass., U.S.A. OY. from Hs.{Lord Ernest Hives - Chair} TORQUE REACTION VIBRATIONS. We have been carrying out a number of experiments lately in connection with the low speed torque reaction vibrations which we get on the 40/50 HP. and also the 20 HP. chassis. The vibrations we refer to are those which come on at speeds from 14 to 22 m.p.h. Our experiments prove that the actual cause of the vibration is-the are impulses, starting the vibration in the mounting of the engine; this being chiefly the side members. We have proved that if we fit friction dampers in the front end of the engine we can considerably reduce these vibrations. If we bolt up the present compensating arrange-ment in the front of the engine we can also reduce the vibrations. We think, however, that the dampers are the best scheme because they still give one the effect of 3-point suspension for frame distorsion due to bad roads etc. We enclose a blue-print which we believe will give you sufficient information to make some of these for a car. contd:- | ||