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).
Test procedures and special features for a B.60 No.4 Unit undergoing a 15,000-mile test.
| Identifier | ExFiles\Box 155\2\ scan0308 | |
| Date | 27th March 1939 | |
| -4- Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}1/MH.{M. Huckerby}27.3.39. B.60 No.4 Unit. New unit for 15,000 miles test includes following special features:- (1) 2.75 journal crankshaft with 3 layer Vandervell main bearings. (2) Adapted R.R.-Wraith type spring drive. (3) Short cylinder liner inserts. (4) Nos.1, 2 and 3 exhaust valves sodium filled, Nos.4, 5 and 6 solid. Run in on De Laval oil, then take following:- (1) Power curves open exhaust and with exhaust system similar to that which will be fitted to the car on best valve timing position determined on previous unit. (2) Take ignition tests on Redline as follows:- Min. advance max. power. Non Detonating Line. Actual governor characteristic. Above at weakest maintained position. Check also, Exhaust valve temperatures. Switching off times and whether cylinders with sodium filled valves vary from cylinders with solid valves. (3) Crankshaft oscillation, also camshaft oscillation. (4) Oil consumption and blow by at 4000 r.p.m., repeat if in excess 2 pts/hr. Continued. | ||