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).
Programme of test bed work for O.H.C. No. 23 and B.18 units, including endurance, noise, and performance tests.
| Identifier | ExFiles\Box 155\2\ scan0064 | |
| Date | 16th March 1937 | |
| 1315. To Rm.{William Robotham - Chief Engineer} c. to Rm{William Robotham - Chief Engineer}/Mths.{Reg Matthews} c. to Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation} Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}10/AP.16.3.37. PROGRAMME OF TEST BED WORK. Further to memo Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}9/AP.27.2.37 No.30 Bed. O.H.C. No.23.Unit. Continue with tests as in previous memo together with the following:- 1. whilst the cylinder head gasket is being tested with the radiator in normal chassis position, check the temperature rise and flow (venturi) at full throttle speeds from 500 RPM. to 4000 RPM. 2. In order to compare the cylinder head breathing with a std. engine, check the induction pipe depressions running open exhaust. 3. In regard to the noise which has come up at 1100 RPM. on the chain, can this be cured. Try stronger balance springs. 4. As the special close coil valve springs are an improvement for surge, is it possible to remove the inner springs and go up to 4500 without bounce. B.18. Endurance to be continued as previous memo up to 50 hrs. if O.K., alternate full throttle and 1/2 load - 10 hours. General 1. Print of curve required showing the following Wraith II. figures. (a) Open exhaust power and M.E.P. (b) Valve timing and indu. depression as checked in the two positions. 2. Summary up-to-date of A.C. oil filter and oil condition. continued | ||