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).
Modification to the ball valve travel on 18-G4 dampers.
| Identifier | ExFiles\Box 105\3\ scan0140 | |
| Date | 18th November 1930 | |
| RHC.{R. H. Coverley - Production Engineer} From Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} X5520. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}1/MJ.18.11.30. 18-G4. Dampers. X5520. We have recently introduced a modification whereby the ball valve over the air vent has its travel reduced to .004. The D.O. are getting out a scheme to enable this to be done on all dampers. Will you please get the necessary information from By/SS.{S. Smith} and carry out the modification on both front and rear of 18-G4. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||