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).
Performance data comparison for E.A.C. and Knave fixed choke carburettors, with a diagram showing an alteration to an air valve deflector.
| Identifier | ExFiles\Box 182\M20\M20.3\ img010 | |
| Date | 29th May 1924 | |
| 29.5.24. E.A.C. FIXED CHOKE TYPE CARBURETTOR. | R.P.M. | E.A.C. B.HP. | Knave. B.HP. | |---|---|---| | 2000 | 90 | 96 | | 1500 | 72 | 78 | | 1000 | 49 | 54 | | 750 | 39 | 42 | | 600✓ | 31 | 34 | ALTERATION TO DEFLECTOR ON AIR VALVE. .625 1.400 TUBE SWEATED ON TO DEFLECTER | ||