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).
Diagram comparing the exhaust valve lift of a Lorraine-Dietrich engine with a 20 HP engine.
| Identifier | ExFiles\Box 5a\5\ 05-page018 | |
| Date | 18th August 1922 | |
| LORRAINE-DIETRICH ENGINE EXHAUST VALVE LIFT DIAGRAM VALVE LIFT (INCHES). LORRAINE 20 H.P. R.R. THE LIGHTER DOTTED CURVE REPRESENTS THE PHANTOM THE 20 H.P. R.R. VALVE. FIGURES OF THE LIFT ARE AS HIGH AS THE LORRAINE. * DURATION OF LIFT (LORRAINE) = 280° * DURATION OF LIFT (20 H.P. R.R.) = 328° * NO TAPPET CLEARANCE DEGREES OF MOVEMENT OF CRANKSHAFT (MEASURED FROM TOP OF CAM) | ||