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 The S.U. Company Ltd. regarding drawing No.1796 for an H. pump, requesting a reduction in the valve lift dimension.
| Identifier | ExFiles\Box 149\6\ scan0026 | |
| Date | 15th September 1937 | |
| 51263 Rm{William Robotham - Chief Engineer}/JBD.{John B. Dixon - Fuel Systems}11/JH. 15th September,1937. The S.U.Company Ltd., Bordesley Green Road, Adderley Park, BIRMINGHAM. For the attention of Mr.Cooper. Dear Sirs, We thank you for the drawings of the H.. pump. We are returning drawing No.1796 showing the pump body as with the dimensions shown on the drawing it allows a valve lift of .035", whereas it was agreed that when the brass valves were fitted the valve lift should be reduced to .022" - .025". This applies to all pumps and was done to prevent valve bounce and the noise it entailed. We would be glad if you would look into this and make the necessary alterations. Yours faithfully, FOR ROLLS-ROYCE LTD. | ||