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 notes and proposed modifications for the 'Spectre' engine.
| Identifier | ExFiles\Box 92\4\ scan0015 | |
| Date | 21th September 1934 | |
| x4694 21.9.34. SPECTRECodename for Phantom III. ENGINE. Slow running would be better with less overlap. D.{John DeLooze - Company Secretary} Stronger valve springs, lighter valves. S. Improved oil round inlet valves. D.{John DeLooze - Company Secretary} Larger water pump. D.{John DeLooze - Company Secretary} Aerolite pistons. T. Coppered shaft and Ph.II standard generally. S. 38" Hg. restriction on pump at 3500 R.P.M. D.{John DeLooze - Company Secretary} & T. Manifold restriction 5 - 6 H.P. D.{John DeLooze - Company Secretary} & T. Correct grinding semi-split pistons. T. & S. Engine for Test Bed to be fitted in chassis. S. Grease gun lubrication for splines, something better required. Look at piece in car. Developed slack. D.{John DeLooze - Company Secretary} & T. Clutch fingers fly out. D.{John DeLooze - Company Secretary} Two spare carbs. for carb. tests. S. Tappets definitely wearing badly. D.{John DeLooze - Company Secretary} Water pump gland, wrong hand. D.{John DeLooze - Company Secretary} Rotor cam wrong with keyway. D.{John DeLooze - Company Secretary} | ||