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).
Initial tension, spring ratings, and alterations for an oil relay ignition governor.
| Identifier | ExFiles\Box 65\1\ scan0043 | |
| Date | 31th December 1924 | |
| X8685 To RHC.{R. H. Coverley - Production Engineer} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}1/LG31.12.24. OIL RELAY IGNITION GOVERNOR. X8685 OIL RELAY. (1) We are anxious to know the initial tension and rating of the springs on the governor we recently gave you so that we can insert them on the curves we are sending away. We suggest that the D.O. should also have this information as soon as possible to enable them to go into the matter of producing a spring of similar rating less highly stressed, also of evolving a production method of rapidly setting the initial spring deflection on the lines suggested. (2) We are anxious to try a lever E.72459 with slightly more clearance in the neck to prevent it fouling the top of the piston E.72503 in the fully extended release position. We believe that this alteration will enable us to reduce the length of the rod E.72648 by .020" with consequent benefit to the relay movement. (3) We have repeated the figures we gave you yesterday of the pull - (a) Required to just start lever E.72459 moving upwards. (b) To just bring the weights together. (c) To just allow the weights to separate. The previous figures were obtained with the governor covered with warm oil. The results with the governor dry except for slight lubrication on the pins etc. are - contd .- | ||