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).
Letter discussing test results and suggestions for a progressive damper control system pump.
| Identifier | ExFiles\Box 101\2\ scan0175 | |
| Date | 14th November 1936 | |
| 500 cl HOTEL DE FRANCE, CHATEAUROUX, Indre. France. GWH{George W. Hancock - Head Chateauroux}/HFH{Hoppy F. Hamilton}/S/JAB. 14th November 1936. To. Rm{William Robotham - Chief Engineer}/Les.{Ivan A. Leslie} c.c G.W.H. 22. G.{Mr Griffiths - Chief Accountant / Mr Gnapp} V.{VIENNA} Thank you for your letter Rm{William Robotham - Chief Engineer}/Les.18/AP.12.11.36. We are forwarding you to-day a full report of our tests. We think this is as far as we can go at present, but would appreciate any further suggestions that you would like us to try. Earlier on, while I. Waller had charge of this car, we see from the file that there is a list of car speeds in miles per hour with the corresponding damper control system poundages opposite, taken on 18 G.IV. We note that these are progressive figures, so that at 10 MPH, full maximum, the pump should give 15 lbs and then at 70 MPH. give 23 lbs. Actually this does not occur on 22.G.V. The pump gives full maximum pressure at 10 MPH. and does not increase over that figure; this we believe is common practice on the present governor pumps. We think that a progressive pump such as 18.G.IV. had, would give 22.G.V. a better ride at intermediate speeds. ------------------ GWH{George W. Hancock - Head Chateauroux}/HFH.{Hoppy F. Hamilton} | ||