Report on exhaust boom and engine vibration tests on a 25 HP model.
| Identifier | Morton\M13.2\ img001 | |
| Date | 8th December 1930 | |
| ORIGINAL To R. {Sir Henry Royce} From Hs {Lord Ernest Hives - Chair} /Rn. {Mr Robinson} c. to Sg. {Arthur F. Sidgreaves - MD} Mor. c. to Da. {Bernard Day - Chassis Design} L. c. to Ey. EV. {Ivan Evernden - coachwork} BOOMS ON 25 HP. Hs {Lord Ernest Hives - Chair} /Rn. {Mr Robinson} 4/MJ. 8.12.30. V634. Attached herewith please find report ref: Hs {Lord Ernest Hives - Chair} /GR. {George Ratcliffe} 2/MJ. 8.12.30. These tests have been conducted with the car stationary, driving the rear wheels through dynamometer drums with a separate power unit. It is a coincidence that we find a boom in the exhaust at almost exactly the same speed as a vibration in the engine. Having separated the two, we should be able to make progress. Hs {Lord Ernest Hives - Chair} /Rn. {Mr Robinson} | ||
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).