Performance comparison graph between standard and low-lift camshafts for the Condor III A engine at a 6.5:1 compression ratio.
| Identifier | ExFiles\Box 33\4\ Scan097 | |
| Date | 4th November 1927 | |
| CONDOR(Aero Engine) III A 6.5/1 COMP: RATIO CAMSHAFT COMPARISONS. A. {Mr Adams} - STANDARD CAMSHAFTS ① TIMING CLEARANCE IN: .025" EX: .025" Valve Timing Diagram A1: TDC, IO 9°, EC 10°, BDC, EO 30°, IC 49° ② WORKING CLEARANCE IN: .015" COLD EX: .025" Valve Timing Diagram A2: TDC, IO 6°, EC 9°, BDC, EO 30°, IC 55° B.- LOW LIFT CAMSHAFTS ① TIMING CLEARANCE IN: .025" EX: .025" Valve Timing Diagram B1: TDC, IO 15°, EC 4°, BDC, EO 52°, IC 44° ② WORKING CLEARANCE IN: .015" COLD EX: .025" Valve Timing Diagram B2: TDC, IO 25°, EC 4°, BDC, EO 52°, IC 57° Graph: Y-Axis Left: CORRECTED BRAKE HORSE-POWER, C/BHP (500-800) Y-Axis Right: FUEL CONS., PTS/HP/HR. (.4, .5, .6) X-Axis: R.P.M. (1500-2100) Graph Lines: A, B Bottom Text: FUEL USED 50/50 BENZOL/AVIATION. DISTRIBUTION POOR AT FULL THROTTLE. Bottom Right Corner: V.H 4/11/27 | ||
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).