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).
Design position report detailing the status of modifications for the Merlin 'C' and 'D' engines.
| Identifier | ExFiles\Box 30\3\ Scan077 | |
| Date | 21th January 1935 guessed | |
| ITEM. (9) DESIGN POSITION. MERLIN 'C' ENGINE - CONTINUED:- Modified oil drain from cylinder head. Completed. Top water outlet to suit nose header tank. Completed. Diagram of supercharger drive (10.13 : 1 ratio). Completed. Modified ramp cyl. head - larger induction ports. In hand. Servo oil pump drive. In hand. Strengthened supercharger drive gears - 10.13:1 ratio. In hand. Modified water pump outlets (to clear electric starter). In hand. MERLIN 'D'. Rear end of crankcase with camshaft drives. In hand. Alternative connecting rod (strap type). Completed. Supercharger. In hand. Two speed gearing for supercharger. In hand. Airscrew reduction gear and dynamo drive. In hand. Oil petrol and water pumps and drives for same. In hand. Combined electric and hand starter with drive for air compressor. In hand. | ||