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).
On the cost-benefit analysis of switching the Main Lever Housing from steel forging to aluminium die-casting.
| Identifier | ExFiles\Box 95\2\ scan0194 | |
| Date | 29th April 1937 | |
| 346 To Rm.{William Robotham - Chief Engineer} From RHC.{R. H. Coverley - Production Engineer} C. to Hs.{Lord Ernest Hives - Chair} RHC.{R. H. Coverley - Production Engineer}2/MJ.29.4.37. Ph.lll MAIN LEVER HOUSING G.83606/7. It is understood that investigations have been carried out in the Expl. Dept. regarding the introduction of the Main Lever Housing on the front suspension as an Aluminium Die Casting instead of a Mild Steel Forging, as at present. The saving on Factory Costs if the die-casting is introduced is £3. 19. 0d. per Chassis Set, the present cost of forgings being £6. 10. 4d. per Chassis Set and the estimated cost for the Aluminium die-casting being £2.11.4d. per Chassis Set. The cost of the Casting Die is £150. 0. 0d. but this would be recovered with the Production of only 38 Pairs of Housings. There will be additional reduction in Production Costs in the handling of Aluminium compared with Steel. It will be possible to introduce the Aluminium Housings on 'D' Series without being involved in any Scrap Forgings. Will Rm.{William Robotham - Chief Engineer} therefore circulate the Standardisation Sheet as it is understood Aluminium housings have proved reliable on the Bumper and road tests. RHC.{R. H. Coverley - Production Engineer} | ||