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 comparing a suggested crankshaft for a 3.5 Bore Engine against an existing narrow pin crank.
| Identifier | ExFiles\Box 85\5\ scan0098 | |
| Date | 28th July 1925 | |
| [ "2.500 DIA", "1.125", "SUGGESTED CRANK FOR", "3.5 BORE ENGINE", "EXISTING NARROW PIN CRANK", "ROLLS ROYCE LTD", "PRINT ROOM", "JUL 28 1925", "DERBY" ], | ||