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).
Damper control, proposing kinetic energy restriction and requesting further tests on the ball valve and spring.
| Identifier | ExFiles\Box 151\2\ scan0389 | |
| Date | 17th February 1939 | |
| 1292² [Distribution List - Struck Through] Dy. {F R Danby} c. Da. {Bernard Day - Chassis Design} c. Rm. {William Robotham - Chief Engineer} c. HPS {Horace Percy Smith - Experimental Factory Mgr} /WD. {Mr Wood / Mr Whitehead} DA {Bernard Day - Chassis Design} /Hdy. {William Hardy} 4/G.17.2.39. [Handwritten Annotation in Red Ink] AFM. {Anthony F. Martindale} Please look up this report + see what we can do on similar lines Rm {William Robotham - Chief Engineer} DAMPER CONTROL. With reference to Rm {William Robotham - Chief Engineer} /AFM. {Anthony F. Martindale} 1/MH. {M. Huckerby} 6.2.39. I had not intended that any appreciable complication should be accepted in securing a pressure rise with velocity characteristic on the damper control unit, and I did not suggest anything more than the addition of a kinetic energy restriction to the spring loaded ball valve which is already used. It will be seen from Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} 1/LG.30.3.28. that a kinetic energy restriction can be made to give an increase of pressure proportional to the square of the velocity almost independent of viscosity variation within the limits that matter. We should like to see curves plotted between pressure and speed for the ball valve and spring at present in use in the B.5, both with and without the priming leak in operation. We should also like to know whether the priming leak is necessary, as it seems to be having a considerable effect on the curves on Sheet 1 (unless it is leakage in the pump) and it may be that the pump will prime even with the damper control set hard, except perhaps in the very first instance if assembled dry. Da {Bernard Day - Chassis Design} /Hdy. {William Hardy} | ||