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).
Technical drawing of a forged crank with a serrated bore and raised letters.
| Identifier | ExFiles\Box 152\1\ scan0229 | |
| Date | 16th November 1936 | |
| 1 1/16 DIA 9/16 DIA 1/16 17/32 R .4995"/.4990 DIA 21/32 3/64 13/32 R 1" R 13/16 21/32 R 5/16 R DIA SERRATED 48 TEETH B.S.S No 46 PART 2 1929 1/32 RAD. ALL OUTSIDE. CORNERS. 1/4 9/16 341 TO BE FORGED ON ONE SIDE ONLY AS SHEWN RAISED LETTERS. MEDIUM CRANK 16 - 11 - 36 MATERIAL. 45/50 TONS. TENSILE ARMSTRONG'S PATENTS Co. LTD. BEVERLEY. DRG. No 341-Z | ||