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 the Falcon X and Curtiss D12 engines.
| Identifier | ExFiles\Box 43\3\ Scan067 | |
| Date | 25th August 1926 guessed | |
| EXHAUST VALVE LIFT DIAGRAM NO TAPPET CLEARANCE CURTISS D12. ENGINE No 252 FALCON X CURTISS D 12. VALVE LIFT CRANKSHAFT DEGREES | ||