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 Armstrong's Patents Co. Ltd. clarifying the drawing diameter for a bronze HP valve sleeve to reduce noise.
| Identifier | ExFiles\Box 152\1\ scan0247 | |
| Date | 28th January 1937 | |
| 1293 Rm{William Robotham - Chief Engineer}/Les.9/AP. Experimental Department 28th January 1937. The Armstrong's Patents Co.Ltd., Eastgate, Beverley, Yorks. For the attention of Mr.Bogg. Dear Sirs, Thank you for your letter of the 26th inst. Our drawing diameter for the bearing of the H.P. valve F.85592 is .3125 + 1". This bronze sleeve must be perfectly free on both the valve and the valve guide. The object of making this sleeve independent of the valve is solely to overcome valve noise. Yours faithfully, FOR ROLLS-ROYCE LTD. | ||