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 to Messrs. Hepworth & Grandage Ltd. requesting drawings and data for special piston rings.
| Identifier | ExFiles\Box 148\1\ scan0216 | |
| Date | 4th December 1939 | |
| 1256 Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation}3/JH. 4th. December, 1939. Messrs. Hepworth & Grandage Ltd., St.{Capt. P. R. Strong} Johns Works, Bradford, YORKS. For the attention of Mr. Brearly. Dear Sirs, A few months ago, we were supplied with some special piston rings which had a greater diametral load than the rings normally fitted to our standard product. We are still carrying out tests in this direction, and would be much obliged if you would let us have further data of the special rings mentioned in a letter from our Mr. Swindall to you, ref. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}3/MH.{M. Huckerby} dated 10th. March, 1939. We would like drawings of the actual rings, including diametral loadings, and any further data re pressures and unit loadings. Yours faithfully, FOR ROLLS-ROYCE LTD. | ||