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).
Comparison of materials and production costs for cylinder liners and cylinder blocks.
| Identifier | ExFiles\Box 132\4\ scan0158 | |
| Date | 9th August 1938 | |
| - 3 - RHC{R. H. Coverley - Production Engineer}/Vs.{J. Vickers}1/JT.9.8.38. 4. Copper-Chrome-Molybdenum (Mark B109) Unheatreated this material gives the maximum machineable hardness "as cast", and possesses excellent wearing qualities. TC. Si. Cr.{Mr Cra???ster / Mr Chichester} Cu. Mo. 3.2 - 3.5% 2.0% .30% 1.0% .80% 5. Heat Treatable Alloy (Mark B110) Ni-chrome Similar to the liners at present supplied by Messrs Sheepbridge Stokes Ltd. for Phantom lll, this material is hardened and tempered to a Brinell of 400. In the foregoing methods and materials there are represented all the latest developments in Alloy Cast Iron suitable for Cylinder bores, each of which has its distinct advantage, our recommendations in each case being based on a "production" - "cost" basis consistent with good bore wear results. Relative Foundry Production Costs Series "A". Sand Cast. Mark. Material. Total Cost of Wraith Cylinder Block. A101 Standard 1. 4. 9½ A102 Nickel Chrome 1. 4.11 A103 Nickel Chrome Molybdenum 1. 6. 6 A104 Nickel Molybdenum 1. 8. 1 A105 Standard, with Covered Chills 1. 5. 5½ Series "B". Centrifugally Cast. Mark Material Total Cost per Liner. B106 Phosphor Chrome 1. 5½ B107 High Phosphor Chrome 1. 9½ B.108 "Austenitic" (Nickel Copper Chrome) 4.10 B109 Copper Chrome Molybdenum 2. 6 B110 Heat Treatable (Nickel Chrome) 1. 9 Note. In the case of a dry linered engine the production and material costs of the cylinder block would remain at £1. 4. 9½ In the case of a wet linered engine the production cost of the block and the material would be reduced to 17/11d. approx. RHC{R. H. Coverley - Production Engineer}/Vs.{J. Vickers} Judkins | ||