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).
List of tests to be carried out on the Spectre engine upon its return to the test bed.
| Identifier | ExFiles\Box 4\1\ 01-page110 | |
| Date | 21th September 1934 | |
| To Ha/Swdl.{Len H. Swindell} -4694 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}28/KW. 21.9.34. SPECTRECodename for Phantom III. Herewith is a list of the tests which we should like carried out on the SpectreCodename for Phantom III engine as soon as this is returned to the test bed :- (1) Valve for exhaust system. (2) Is 20/25 induction system better for slow running than the Bentley. Try on T. Salt's engine. (3) Investigate fall of oil pressure at low speeds. (4) Why so much back press. in water system. (5) Slipper wheel off and find where periods are. (6) Heat flow to oil. (7) Mech. off on white metal main engine. (8) Bouncing speed for lightened valves and new valve springs. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||