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).
Clutch judder, the function of anti-rattle springs, and related testing procedures.
| Identifier | ExFiles\Box 129\4\ scan0253 | |
| Date | 6th July 1936 | |
| -2- between the engine and the pedal shaft (25/30). When judder is complained of, we usually find a light thrust poundage is helpful, so long as the slip at get-away is not excessive, also that a plate which is or has been oily is more liable to judder. The reason for raising the clutch fingers during the test, and thereby eliminating the action of the anti-rattle springs, is that more accurate and consistent readings can be obtained, owing both to elimination of the finger friction, and the considerable variation, in the strength of the anti-rattle springs. The Anti-rattle springs usually reduce the total thrust by 100 to 150 lbs. Will K please let us know, after a few months experience, if they find the rig sufficiently useful to justify making another for their use as only actual experience can decide this point. Rm{William Robotham - Chief Engineer}/NRC.{N. R. Chandler} | ||