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).
Potential cost savings and design changes for the B.60 Rocker cover.
| Identifier | ExFiles\Box 148\2\ scan0274 | |
| Date | 27th November 1939 | |
| To G/Rb.{R. Bowen} Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation}14/JH.27.11.39. Further to our conversation re B.60 Rocker covers with your Mr. Anderson. This is to confirm that the data required on this section is as follows. (a) What is the saving in time and cost of the machining of the lip of the B.60 rocker cover, as against the grooving of the Wraith cover. (b) With reference to the proposed scheme ECD.1526. How much is left of this saving if this were adopted. (c) If the cover were a die casting could the "Wraith" type of groove be incorporated without difficulty, and if so what would the production cost then be, and what would be the approx. cost of the die. (d) It may be possible to put the sealing washers into a suitable groove in the cylinder head face. This would allow the use of a simple flange on the rocker cover. Also, this might then be a steel pressing. Would the saving in this case, outweigh the extra complication on the cyl. head. For the moment we would have to assume that the usual type of groove was retained, but we are looking into other means of locating the washer. What information on tool costs can you supply re the suggested pressed steel cover? Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation} | ||