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 detailing a modification to a 2nd speed driver gear, showing every alternate tooth reduced.
| Identifier | ExFiles\Box 86\4\ scan0068 | |
| Date | 21th December 1933 | |
| Hs.{Lord Ernest Hives - Chair}1203 EVERY ALTERNATE TOOTH REDUCED .040 DEVELOPED VIEW OF TEETH MODIFIED TO GR{George Ratcliffe} 136. 2ND SPEED DRIVER GEAR ROLLS ROYCE, LTD. PRINT ROOM DEC 21 1933 DERBY. | ||