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).
Power curve graph for the Lighter Phantom engine, showing an increase due to a low depression carburettor.
| Identifier | ExFiles\Box 66a\1\ scan0194 | |
| Date | 13th April 1927 | |
| LIGHTER PHANTOM POWER CURVE. (SHEWING INCREASE DUE TO LOW DEPRESSION CARBURETTOR). ENGINE N° AU 25. COMPRESSION RATIO 4.61 TO 1 STANDARD INDUCTION PIPE. BED EXHAUST SYSTEM (WITH SILENCER). CORRECTED TO N.T.P. BRAKE HORSE POWER EAGLE VIII HORIZONTAL R.R.C.H. CARB. STANDARD CARB. INDUCTION' PIPE DEPN STD. CARB. EAGLE CARB. R.P.M. OF ENGINE DEPN IN INDN PIPE (INS. HG) | ||