Graph comparing the inlet valve lift diagrams for the Falcon X and Curtiss D12 engines.
| Identifier | ExFiles\Box 43\3\ Scan065 | |
| Date | 12th August 1926 guessed | |
| INLET VALVE LIFT DIAGRAMS No TAPPET CLEARANCE CURTISS D 12. ENGINE Nọ 252. FALCON(Aero Engine) X CURTISS D 12 VALVE LIFT. CRANKSHAFT DEGREES. | ||
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).