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 'Super Sports' Phantom engine, comparing its performance against other variants.
| Identifier | ExFiles\Box 65a\2\ scan0030 | |
| 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 CLce). 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) Graph Y-Axis (Brake Horse Power): 60, 80, 100, 120, 140 Graph X-Axis (R.P.M of Engine): 1000, 1500, 2000, 2500, 3000 | ||