Rolls-Royce Archives
         « Prev  Box Series  Next »        

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%
  
  


Copyright Sustain 2025, All Rights Reserved.    whatever is rightly done, however humble, is noble
An unhandled error has occurred. Reload 🗙