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 regarding modifications to oil pumps to achieve quieter operation.
| Identifier | ExFiles\Box 77\1\ scan0154 | |
| Date | 7th February 1928 | |
| Y3672 OY12.R.2.7.28 February 7th, 1928. Mr. R.W.H.Bailey Rolls Royce Ltd., Derby, England. (Attention Mr. E.{Mr Elliott - Chief Engineer} W. Hives) ( Attention Mr. Nadin ) Dear Mr. Bailey: RE OIL PUMPS We sent through 12 oil pumps on production with grooves in body and cover as shown in SK-130 herewith. Attached report from Mr. Caswell refers to these and confirms that they result in quieter operation. We are instructing a similar change on pumps now in process. There was no appreciable change as regards variation in pressure with speed. Very truly yours, Maurice Olley Encls. | ||