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).
Blueprint diagram illustrating Stutz engine valve lift and timing.
| Identifier | WestWitteringFiles\R\2December1927-February1928\ Scan083 | |
| Date | 19th December 1927 guessed | |
| STUTZ VALVE LIFT DIAGRAM. EXHAUST CAM LEADS INLET CAM BY 116° (CAMSHAFT). BOTH CAMS ARE THE SAME SHAPE. TAPPET CLEARANCE (RUNNING) = .028". VALVE DURATION WITH ABOVE CLEARANCE IS 230° (ON CRANKSHAFT). TAPPET CLEARANCE TO CHECK TIMING = .032". MAXIMUM VALVE LIFT (AT .028") = .34375". Y-Axis: VALVE LIFT (INS). X-Axis: CRANKSHAFT ANGULAR MOVEMENT. Graph Labels: RUNNING CLEARANCE (.028), Exhaust Valve, Inlet Valve, VALVE OVERLAP. FIG: II. VALVE TIMING. Left Diagram: T.D.C., I.O. 16° P.T.D.C., E.C. 9° P.T.D.C., 54°, 42°, I.C., E.O., B.D.C., .032 TAPPET CLEARANCE. Right Diagram: T.D.C., I.O. 10° P.T.D.C., E.C. 5° P.T.D.C., 57°, 45°, I.C., E.O., B.D.C., .028" TAPPET CLEARANCE. (RUNNING CONDITIONS). | ||