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).
Conclusions of report 60.JS regarding engine-mounted radiator tests and their effect on oscillation and steadiness.
| Identifier | ExFiles\Box 27a\1\ Scan074 | |
| Date | 15th July 1932 guessed | |
| CONCLUSIONS OF 60.JS.{Mr Johnson's Secretary} REPORT. We have placed the value of the radiator mounted on the engine at 50%, from observations of tests carried out with 60.JS{Mr Johnson's Secretary}, after building this car up with standard radiator mounting, both from the view of wing steadiness, radiator steadiness, and engine steadiness. The radiator in its present design would not of course stand up to the strains imposed upon it, mounted on the engine. To decrease the amplitude of oscillation of the engine to the same extent as that obtained by the mounting of the radiator on the engine, with the radiator mounted on the crossmember, considerably more damping would be required than that which can be obtained with the present torque reaction dampers, but this would not alter the rate of oscillation, and the period of the engine and wings would still coincide, which we wish to avoid. The results of the steadiness of the wings with the radiator mounted on the engine, is, we believe, due to the alteration to the period or weight of the mass of the engine more than any damping effect. G.W.H. | ||