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).
Series of indicator diagrams comparing performance under various component configurations and operating conditions.
Identifier | ExFiles\Box 16\4\ Scan233 | |
Date | 3rd January 1931 guessed | |
SHEET I Col: I Row 1: 20 HP. REAR. 65/75 LB. LOW PRESSURE. .025" DIA. AIR VENT. LIFT .010". H.P. VALVE DRILLED .055" DIA. 450 R.P.M. 1" STROKE. 25°C. Chart values: 154 LB/D", 1.23 D", 54.6% Row 2: 20 HP. REAR. 65/75 LB. HIGH PRESSURE. .025" DIA. AIR VENT. LIFT .010". H.P. VALVE DRILLED .055" DIA. 450 R.P.M. 1" STROKE. 25°C. Chart values: 154 LB/D", 1.49 D", 54.5% Row 3: 20 HP. REAR. 65/75 LB. HIGH PRESSURE. .025" DIA. AIR VENT. STD. LIFT .050". H.P. VALVE DRILLED .055" DIA. 130 R.P.M. 2 1/2" STROKE. 25°C. Chart values: 154 LB/D", 3.42 D", 72.9% Row 4: 20 HP. REAR. 65/75 LB. LOW PRESSURE. .025" DIA. AIR VENT. STD. LIFT .050". H.P. VALVE DRILLED .055" DIA. 130 R.P.M. 2 1/2" STROKE. 25°C. Chart values: 154 LB/D", 2.1 D", 53.1% Row 5: 20 HP. REAR. 65/75 LB. HIGH PRESSURE. .025" DIA. AIR VENT. STD. LIFT .050". H.P. VALVE DRILLED .055" DIA. 70 R.P.M. 4" STROKE. 25°C. Chart values: 154 LB/D", 4.12 D", 78.2% Row 6: 20 HP. REAR. 65/75 LB. LOW PRESSURE. .025" DIA. AIR VENT. STD. LIFT .050". H.P. VALVE DRILLED .055" DIA. 70 R.P.M. 4" STROKE. 25°C. Chart values: 154 LB/D", 3.46 D", 75.4% Col: II Row 1: 20 HP. REAR. 65/75 LB. LOW PRESSURE. AIR VENT BALL REMOVED. DAMPER FILLED TO STD LEVEL. 450 R.P.M. 1" STROKE. 25°C. Chart values: 154 LB/D", 1.17 D", 50% Row 2: 20 HP. REAR. 65/75 LB. HIGH PRESSURE. AIR VENT BALL REMOVED. DAMPER FILLED TO STD. LEVEL. 450 R.P.M. 1" STROKE. 25°C. Chart values: 154 LB/D", 1.40 D", 50.2% Row 3: 20 HP. REAR. 65/75 LB. HIGH PRESSURE. AIR VENT BALL REMOVED. OIL LEVEL. STANDARD. 130 R.P.M. 2 1/2" STROKE. 25°C. Chart values: 154 LB/D", 4.15 D", 85% Row 4: 20 HP. REAR. 65/75 LB. LOW PRESSURE. AIR VENT BALL REMOVED. OIL LEVEL. STANDARD. 130 R.P.M. 2 1/2" STROKE. 25°C. Chart values: 154 LB/D", 3.57 D", 85.5% Row 5: 20 HP. REAR. 65/75 LB. HIGH PRESSURE. AIR VENT BALL REMOVED. OIL LEVEL. STANDARD. 70 R.P.M. 4" STROKE. 25°C. Chart values: 154 LB/D", 4.71 D", 88.4% Row 6: 20 HP. REAR. 65/75 LB. LOW PRESSURE. AIR VENT BALL REMOVED. OIL LEVEL. STANDARD. 70 R.P.M. 4" STROKE. 25°C. Chart values: 154 LB/D", 4.07 D", 88.2% Col: III Row 1: 20 HP. REAR. 65/75 LB. LOW PRESSURE. .025" DIA. AIR VENT. LIFT .004". H.P. VALVE DRILLED .032" DIA. 450 R.P.M. 1" STROKE. 25°C. Chart values: 154 LB/D", .87 D", 38.9% Row 2: 20 HP. REAR. 65/75 LB. HIGH PRESSURE. .025" DIA. AIR VENT. LIFT .004". H.P. VALVE DRILLED .032" DIA. 450 R.P.M. 1" STROKE. 25°C. Chart values: 154 LB/D", 1.05 D", 39.3% Row 3: 20 HP. REAR. 65/75 LB. LOW PRESSURE. .025" DIA. AIR VENT. LIFT .004". H.P. VALVE DRILLED .032" DIA. 130 R.P.M. 2 1/2" STROKE. 25°C. Chart values: 154 LB/D", 3.07 D", 75.9% Row 4: 20 HP. REAR. 65/75 LB. HIGH PRESSURE. .025" DIA. AIR VENT. LIFT .004". H.P. VALVE DRILLED .032" DIA. 130 R.P.M. 2 1/2" STROKE. 25°C. Chart values: 154 LB/D", 3.23 D", 69.5% Row 5: 20 HP. REAR. 65/75 LB. LOW PRESSURE. .025" DIA. AIR VENT. LIFT .004". H.P. VALVE DRILLED .032" DIA. 70 R.P.M. 4" STROKE. 25°C. Chart values: 154 LB/D", 3.8 D", 82.7% Row 6: 20 HP. REAR. 65/75 LB. HIGH PRESSURE. .025" DIA. AIR VENT. LIFT .004". H.P. VALVE DRILLED .032" DIA. 70 R.P.M. 4" STROKE. 25°C. Chart values: 154 LB/D", 4.12 D", 77.8% Col: IV Row 1: 20 HP. REAR. 65/75 LB. LOW PRESSURE. .025" DIA. AIR VENT. STANDARD LIFT. H.P. VALVE DRILLED .032" DIA. 450 R.P.M. 1" STROKE. 25°C. Chart values: 154 LB/D", 1.31 D", 55% Row 2: 20 HP. REAR. 65/75 LB. HIGH PRESSURE. .025" DIA. AIR VENT. STANDARD LIFT. H.P. VALVE DRILLED .032" DIA. 450 R.P.M. 1" STROKE. 25°C. Chart values: 154 LB/D", 1.24 D", 45.4% Row 3: 20 HP. REAR. 65/75 LB. LOW PRESSURE. .025" DIA. AIR VENT. STD. LIFT .050". H.P. VALVE DRILLED .032" DIA. 130 R.P.M. 2 1/2" STROKE. 25°C. Chart values: 154 LB/D", 3.42 D", 84.4% Row 4: 20 HP. REAR. 65/75 LB. HIGH PRESSURE. .025" DIA. AIR VENT. STD. LIFT .050". H.P. VALVE DRILLED .032" DIA. 130 R.P.M. 2 1/2" STROKE. 25°C. Chart values: 154 LB/D", 4.00 D", 85% Row 5: 20 HP. REAR. 65/75 LB. LOW PRESSURE. .025" DIA. AIR VENT. STD. LIFT .050". H.P. VALVE DRILLED .032" DIA. 70 R.P.M. 4" STROKE. 25°C. Chart values: 154 LB/D", 3.91 D", 85% Row 6: 20 HP. REAR. 65/75 LB. HIGH PRESSURE. .025" DIA. AIR VENT. STD. LIFT .050". H.P. VALVE DRILLED .032" DIA. 70 R.P.M. 4" STROKE. 25°C. Chart values: 154 LB/D", 4.46 D", 84% Col: V Row 1: 20 HP. REAR. 65/75 LB. LOW PRESSURE. .025" DIA. AIR VENT. LIFT .010". NO HOLE IN H.P. VALVE. 450 R.P.M. 1" STROKE. 25°C. Chart values: 154 LB/D", 1.01 D", 47.1% Row 2: 20 HP. REAR. 65/75 LB. HIGH PRESSURE. .025" DIA. AIR VENT. LIFT .010". NO HOLE IN H.P. VALVE. 450 R.P.M. 1" STROKE. 25°C. Chart values: 154 LB/D", .990 D", 43% Row 3: 20 HP. REAR. 65/75 LB. LOW PRESSURE. .025" DIA. AIR VENT. STD. LIFT .050". H.P. VALVE NOT DRILLED. 130 R.P.M. 2 1/2" STROKE. 25°C. Chart values: 154 LB/D", 3.48 D", 85.5% Row 4: 20 HP. REAR. 65/75 LB. HIGH PRESSURE. .025" DIA. AIR VENT. STD. LIFT .050". H.P. VALVE NOT DRILLED. 130 R.P.M. 2 1/2" STROKE. 25°C. Chart values: 154 LB/D", 4.05 D", 86.0% Row 5: 20 HP. REAR. 65/75 LB. LOW PRESSURE. .025" DIA. AIR VENT. STD. LIFT .050". H.P. VALVE NOT DRILLED. 70 R.P.M. 4" STROKE. 25°C. Chart values: 154 LB/D", 4.13 D", 90% Row 6: 20 HP. REAR. 65/75 LB. HIGH PRESSURE. .025" DIA. AIR VENT. STD. LIFT .050". H.P. VALVE NOT DRILLED. 70 R.P.M. 4" STROKE. 25°C. Chart values: 154 LB/D", 4.84 D", 91.0% | ||