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).
Lost movement and deflection in a clutch pedal mechanism, with a supporting diagram.
| Identifier | WestWitteringFiles\M\2Jan1925-March1925\ Scan49 | |
| Date | 25th September 1924 | |
| R.R. 493A (50m) (D.B. 173 25-9-24) J.H.D. EXPERIMENTAL REPORT. -5- Expl. No. REF: .011" + .142" + .003 + .0025 = .158". This equal a lost movement at end of pedal plate of .810" and due to the pedal deflection about the shaft, there is an additional lost movement at the end of the pedal plate of .120" - this gives a total of .930". The layout of these pedals seems to suggest that the previous type of pedals (N.sch.1876) is preferable, since in the type under test there is not sufficient pedal movement to allow full clutch plate movement. Fig.VI. [Diagram of a clutch operating lever and trunnion] Labels on diagram: Lines scribed along here. Bearing. Readings taken near. Downward load applied here. Readings taken here. Bearings. Supported by trunnion Referring to Fig.VI., before any load was applied a line was scribed along the clutch operating lever, and along the operating shaft on the centre line (the clutch operating lever was parallel with the bed plate so that load at start was at right angles to it). After the load was applied, with the same scribing-block setting, a line was again run along the lever and shaft. It was found that the shaft had twisted along the whole length, although the difference in the two contd :- | ||