Instruction to re-mark 'Condor' engines as Series 1 or Series 2 based on their gear ratio.
| Identifier | ExFiles\Box 38\6\ Scan139 | |
| Date | 12th December 1919 | |
| X3389. COPY. To EP. {G. Eric Platford - Chief Quality Engineer} from Bn. {W.O. Bentley / Mr Barrington} To By. {R.W. Bailey - Chief Engineer} " " To Da. {Bernard Day - Chassis Design} " " Bn {W.O. Bentley / Mr Barrington} 6/W2.12.19. X.3254. RE MARKING OF CONDOR(Aero Engine)" ENGINES. X.3399. X.3389. After conversation with the Technical Dept. Air Ministry, they inform us that they wish "Condor(Aero Engine)" engines fitted with .55 Gear to be marked as Series 1/ and those fitted with .666 gear as Series 2. Will you please arrange accordingly. The log books should also bear this indicator. Bn. {W.O. Bentley / Mr Barrington} | ||
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).