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 for engine units, including comparative analysis of exhaust and induction systems.
| Identifier | ExFiles\Box 155\2\ scan0122 | |
| Date | 3rd August 1937 | |
| -2- C.17. Give report on the comparative exhaust systems as taken on this unit. (a) 25/30. (b) Bentley. (c) Vauxhall. (d) Chevrolet. (e) Oldsmobile. With tappet setting of .006" check whether any noise periods as on Wraith. Repeat above with RS.{Sir Henry Royce's Secretary}540 springs and Rm.{William Robotham - Chief Engineer}400 top washers to give a line on whether stronger springs make any difference to the noisy periods experienced on Wraith. No.5 TEST BED. Ph.III. No.9.UNIT. This unit has been assembled for 37-EX. Running in for new bearings and pistons to be carried out. Power curve open exhaust and with standard silencer. Oil consumption and repeat of 1 hour duration each at 4000 R.P.M. Unit to be tuned up generally with all leaks etc. cured and note whether timing gears are O.K. the above is URGENT. Ph.III. No.3. UNIT. Following completion of No.9. unit refit No.3. on the bed and in present condition. Continental heads and LeC.5401 camshaft compare the existing std. induction system against the modified hot box and throttle body Rs.{Sir Henry Royce's Secretary}462/3/4/5/6. These to be compared for power, distribution and consumption (weakest maintained) taking induction pipe depressions. BENTLEY UNIT No.4. This unit now on test has 'Magnolia' lined main bearings. New big end bearings in A.C.6. Coolant jets are fitted in the cylinder head in accordance with LeC.5664. continued | ||