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).
Performance comparison graphs for a J III Rear low pressure engine with different valve setups.
Identifier | ExFiles\Box 179b\4\ img030 | |
Date | 6th April 1933 guessed | |
--- TOP GRAPH --- J III REAR 35/35 LB LOW PRESSURE BLANK DISC VALVE IN EXT PRESS INLET 4" STROKE 5-4-33 Y-Axis: 308 LB./D" = 133 LB. X-Axis: 120" I.S. R.P.M. 180 135 90 45 GOV PRESS 4 LB/D" 45R.P.M - 0LB/D" AFTER ABOVE TESTS 45R.P.M. - 0LB/D" BEFORE ABOVE TESTS --- MIDDLE GRAPH --- J III REAR 35/35 LB LOW PRESSURE .250" EXT. PRESS INLET VALVE - 1 OFF .062" DIA. RELEASE VENT 4" STROKE 6-3-33 Y-Axis: 308 LB./D" = 133 LB. X-Axis: 120" I.S. R.P.M. 180 135 90 45 GOV PRESS 4 LB/D" 45 RPM - 0LB/D" BEFORE ABOVE TESTS AFTER TESTS --- BOTTOM GRAPH --- J III REAR 35/35 LB LOW PRESSURE DISC VALVE DRILLED .015" IN EXT PRESS INLET 4" STROKE 6-4-33 Y-Axis: 308 LB./D" = 133 LB. X-Axis: 120" I.S. R.P.M. 180 135 90 45 GOV. PRESS 4 LB/D" 45R.P.M - 0LB/D" BEFORE & AFTER ABOVE TESTS. | ||