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).
Tests to measure the constraint that various components have on engine movement for the 4.B.IV model.
| Identifier | ExFiles\Box 86\5\ scan0088 | |
| Date | 8th August 1933 | |
| X222 To E.{Mr Elliott - Chief Engineer} From Hs{Lord Ernest Hives - Chair}/Wym.{G. Harold Whyman - Experimental Manager} Hs{Lord Ernest Hives - Chair}/Wym.{G. Harold Whyman - Experimental Manager}6/KT. 8.8.33. ENGINE MOVEMENT ON 4.B.IV. We have carried out a series of tests to measure the constraint that the Pedal mechanism, Exhaust system, and Torque Reaction Dampers, have upon engine movement. The method of testing adopted was to bolt a piece of girder iron on to the cylinder head in place of the valve gear rocker shaft, and bolt another piece of girder iron 3 ft. 2 ins. long on to this at right angles 3" from the rear end of the cylinder head. From the overhanging end of this piece of girder we attached a scale pan and added weights as necessary to move the engine on its rubber mounting, the actual amount of movement being registered on a clock micrometer mounted on the dashboard with point of contact on the face of the rear S.U. carb. The attached print shews the value of the various parts in restricting the engine movement. We would here like to emphasise that the zero point with the exhaust system removed is slightly different to that when it is fitted, because when fitted the engine is slightly compressed, the rubbers in the N.S. engine foot, and when removed the engine takes a more central position. This is the reason for the drop at the top of curves 4 & 6. Hs{Lord Ernest Hives - Chair}/G.H.Whyman. | ||