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).
Comparative weight analysis of Duralumin and Steel Rocker Pedestals for the Phantom Rocker Mechanism.
| Identifier | ExFiles\Box 14\1\ Scan001 | |
| Date | 22th June 1926 | |
| X7000 To Hs{Lord Ernest Hives - Chair} from RHC.{R. H. Coverley - Production Engineer} RHC{R. H. Coverley - Production Engineer}4/BE. 22.6.26. RE PHANTOM ROCKER MECHANISM. 12. EX. We give below comparitive weights of Duralumin and Steel Rocker Pedestals used on the above:- Standard Steel Pedestals 1 set(4) - E.70215 - .812 lbs. 1 " (") - E.70217 - 1.390 " 1 " (") - E.71344 - 1.405 " ...........3.607 lbs. Duralumin Pedestals 1 set(4) - E.74650 - .296 lbs. 1 " (") - E.74651 - .515 " 1 " (4) - E.74652 - .523 " ...........1.334 lbs. Diff: in weight - 2.273 lbs. Standard Rocker Shaft(Steel Pedestals ) Front & Rear Halves assembled complete ) 12.031 lbs. Rocker Shaft(Duralumin Pedestals) Front & Rear Halves assembled complete ) 9.750 lbs. Total saving on assembled units - 2.281 lbs. RHC.{R. H. Coverley - Production Engineer} Hce | ||