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).
Governor control springs, including forces, stiction, and the resulting ignition advance curve.
| Identifier | ExFiles\Box 65\1\ scan0027 | |
| Date | 18th December 1924 | |
| -2- EXPERIMENTAL REPORT. Expl. No. REF. Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}2/LG18.12.24. spring A, 3 lbs. with spring B. The actual working difference between the two is therefore greater than the 50% previously given. The difference between the force P. which just caused the weights to come together, and the force P. which just allowed them to separate was surprising great. In point of fact, for the spring A.{Mr Adams} the two pulls were 3 1/2 lbs. and 1 1/4 lbs. Possibly some of this is due to the stiction of the oil film between the flat faces of the weights when they come together and might be relieved by some projections on these faces. We have not succeeded in totally eliminating sticking as yet, but have not had the relay remain in the fully advanced position with the governor control springs we are using. On the attached photostat curve B. is the best ignition advance curve that we can at present obtain. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||