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 comparing the performance of the 'Super Sports' Phantom engine against the 'Continental' Phantom and an average production unit.
| Identifier | ExFiles\Box 92\2\ scan0011 | |
| Date | 28th August 1928 | |
| [ "V403", ""SUPER SPORTS" PHANTOM POWER CURVE.", "ENGINE No. S.S. 3.", "COMP. RATIO = 4.5.", "CLAUDEL-HOBSON CARB.", "AREA PAST CHOKE = 1.532 ☐"", "OPEN EXHAUST.", "VALVE TIMING (.020 CLS).", "INLET OPENS 14° AFTER T.D.C.", "INLET CLOSES 34° AFTER B.D.C.", "EXHAUST OPENS 34° BEFORE B.D.C.", "EXHAUST CLOSES 2° AFTER T.D.C.", "BRAKE HORSE POWER", "R.P.M OF ENGINE.", ""SUPER SPORTS" PHANTOM", ""CONTINENTAL" PHANTOM.", "COMP RATIO - 4.63", "TEST BED EXHAUST SYSTEM.", "CLAUDEL HOBSON CARB.", "AVERAGE UNIT TEST (PRODUCTION)" ], | ||