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).
Specification revision document detailing changes to valves and fittings.
| Identifier | ExFiles\Box 54\4\ Scan164 | |
| Date | 27th October 1933 | |
| (2) RHC {R. H. Coverley - Production Engineer} /WSC. {W. S. Cassel} 4/AP.27.10.33. Previous Specification. Valves & Fittings. 12-E.28651 Inlet Valves-S/SLV. 12-E.30557 Exhaust " -S/SLV. Removed. Revised Specification. Valves & Fitts.LOP.E.40218. The following new parts fitted:- 12-E.28651/1 Inlet Valves-S/SLV. Lightened type. 6-Ex.12458 Salt cooled Exhaust valves. Tulip head type - produced in KE.965-with stellite Seats. 6-Ex.12458 Salt cooled exhaust valves-Tulip head type - Produced in KE.965 - seats unstellited. Above Exhaust valves have 45° seats increased in width to suit exhaust seats, and are fitted as follows:- Nos.1.3.5.13.15. & 17 bores-stellite seats. Nos.7.9.11.19.21.& 23 bores-unstellited. Remaining parts to complete are existing. RHC {R. H. Coverley - Production Engineer} /WSC. {W. S. Cassel} | ||