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).
The deflections of a clutch operating shaft under various loads.
| Identifier | WestWitteringFiles\M\2Jan1925-March1925\ Scan48 | |
| Date | 25th September 1924 | |
| R.R. 493A (50H) (D.B. 173 25-9-24) J.H.D. -4- EXPERIMENTAL REPORT. Expl. No. REF: The clutch operating shaft was then fixed upon a large bed-plate with bearings as in the clutch casing. The bearings were clamped down, the trunnion lever resting on a trunnion, and load applied on the connecting link pin in the operating shaft lever. The deflections of the operating shaft lever, the connecting link pin and the trunnion lever were then taken. The load applied was 237.5 lbs. and the deflections were :- Operating shaft lever 0.143" Connecting link pin 0.146" (this shows a twist of .003") Trunnion lever. 0.0055" See Fig.Vl.{V. Lewis / Mr Valentine} for positions of these deflections. The deflections of the operating shaft lever were then found for each 20 lbs. load (Table lV.) Wt. of tray and ropes 66.5 lbs. Table lV. Load in lbs. | Lever Deflection. | Load in lbs. | Lever Deflection. 0 | 0 | 168.5 | .095" 66.5 | .038" | 188.5 | .1075" 88.5 | .050" | 208.5 | .121" 108.5 | .060" | 228.5 | .134" 128.5 | .072" | 238.5 | .142" 148.5 | .083" | 248.5 | .148" Summing up these deflections, we find that the deflection at the end of the clutch operating lever pin is :- (Deflection of trunnion X 6/3.05) + (Deflection of operating lever)+ (Twist of con: link pin) i.e. (6/3.05 X .0055) + .142" + .003". .`. lost movement of pedal at 2.750" radius = contd :- | ||