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).
Work program for testing and modifying various engine units.
| Identifier | ExFiles\Box 155\2\ scan0325 | |
| Date | 25th May 1939 | |
| -3- Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}8/JH.25.5.39. Wraith III No.4 Unit. (Cont'd). memo. carry out - (1) Tests on performance distribution and metering of duplex induction system (Stromberg duplex carb). (2) Valve bounce speeds with silencer fitted, unit having double valve springs and strengthened exhaust valves. No.5. Test House. B.60 No.1 Unit. Having completed tests on Duplex induction system, return engine to shop for fitting of chain drive. B.60 No.3 Unit. When previously fitted on the other bed this unit gave very good power and should be rechecked. Take full characteristics of cylinder head as carried out on B.60 No.1. New cylinder head will then be ready PD.368 and similar tests should be taken. Any spare time should be filled by investigation of ignition governor characteristic, whether this unit is similar to No.4 in respect of advance being 4° to 6° retard of laboratory setting. B.80 No.2. Continue crankshaft damper tests as previous programme. No.2. Test House. B.II No.4 Unit. Returned to shop following valve failure. Will be assembled with EB.2844 pistons and std. ring arrangement for | ||