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).
Graph of constant speed varying boost curves for a KES.S.18 engine with a KES IV blower.
| Identifier | ExFiles\Box 179b\2\ img076 | |
| Date | 9th November 1932 guessed | |
| K.E.S. S. 18 ENGINE WITH KES IV BLOWER. CONSTANT SPEED VARYING BOOST CURVES TAKEN WITH D.T.D 134 FUEL A2 PLUGS. CURVES SHOW AUDIBLE DETONATION IN FEET ALSO INDICATE POWER AVAILABLE FOR VARYING TAKE OFF SPEEDS & BOOST. THE AUDIBLE DETONATION IS CONSIDERABLY LESS THAN THE STANDARD S. ENGINE DUE TO COOLER INDUCTION ALSO IMPROVED DISTRIBUTION. & .823 BLOWER GEARS. "TAKE OFF" CONDITION FOR KES IV BLOWER ON STD ENGINE STD 1932 KES 'S'. DETONATION 12'. AT 2250 R.P.M. STD 1932 KES 'S'. DETONATION 6'. 2800 R.P.M. DETONATION ON STD KES 'S'. AT TAKE OFF CONDN = 18'-20'. ie 1950 R.P.M. 1.75 lbs/sq" BOOST. 460 B.H.P. Y-AXIS: BOOST PRESS LBS/sq" X-AXIS: B.H.P. CURVES: 2200 R.P.M, 2300 R.P.M, 2400 R.P.M, 2500 R.P.M | ||