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).
Cost comparison for foundry production of Wraith cylinder blocks and short inserts using different materials.
| Identifier | ExFiles\Box 132\5\ scan0105 | |
| Date | 1st July 1939 | |
| -3- Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation}5/MH.{M. Huckerby}1.7.39. RELATIVE FOUNDRY PRODUCTION COSTS. (Total cost of Wraith cyl. block). A.101 Standard matl. £1. 4. 9½d.{John DeLooze - Company Secretary} A.102 Nickel Chrome £1. 4. 11 A.103 " " Molybd. £1. 6. 6d. A.104 " " Molybdenum £1. 8. 1d. B.106 Phosphor Chrome 1. 5½d.{John DeLooze - Company Secretary} per liner. B.107 High Phos. Chrome 1. 9½d.{John DeLooze - Company Secretary} " " B.108 "Austenitic" (Ni.C.Chr.) 4.10d. " " B.109 Cr.{Mr Cra???ster / Mr Chichester} Chr.Mo. 2. 0d. " " Short inserts. Latest correspondence to Roy{Sir Henry Royce}/Les.{Ivan A. Leslie} states that the following are their rock-bottom prices:- "Brivadium" at 2/10d. each = 17/-d.{John DeLooze - Company Secretary} per engine. "Hicrome" at 5/0d. each = £1.13.0d. " ". Allowing in addition, 50% of the cost (for final machining) of a full length liner. Total cost per engine now becomes - "Brivadium" £1. 4. 9d. "Hicrome" £2. 0. 9d. NOTE. We have had a number of short inserts machined by British Piston Ring Co. from our own castings, and their charge was 1/4½d.{John DeLooze - Company Secretary} each. Add to this our normal foundry cost, and we find that "Brivadium" is not really excessive for cost. | ||