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 for a stiffer 2-inch pin crankshaft for a 25 HP engine.
| Identifier | ExFiles\Box 103\3\ scan0073 | |
| Date | 5th August 1931 guessed | |
| SECTION CC Hs{Lord Ernest Hives - Chair} 419 CHAMFER .090 AT 45º ON ALL WEBS OTHER DIMENSIONS TO E 55619. THEN TO BE MACHINED TO SCH 1402 FOR BALANCE WEIGHTS TO Hs{Lord Ernest Hives - Chair} 359 INSIDE DIA OF JOURNALS .500 INSTEAD OF 1.125 .500 DIA. .250 C THIS CURVE TO SCALE .225 1.350 Rd. 3.500 INSTEAD OF 3.250 STIFFER CRANKSHAFT [2" PIN] 25 HP | ||