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 the probable manufacturing operations for a 'Delco' Damper Piston.
| Identifier | ExFiles\Box 28\1\ Scan279 | |
| Date | 15th October 1931 | |
| OPERATIONS:- 1. TURN DIA FINISHED SIZE AND FACE END. 2. MILL ALL FLAT FACES. 3. DRILL ALL HOLES. 4. COUNTERBORE. 5. TAP - SPRING SCREW HOLES (ONE HALF PISTON ONLY) 'DELCO' DAMPER PISTON. PROBABLE OPERATIONS FOR MANUFACTURE. .095 .375 15 OCT 31 DERBY. | ||