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 five performance charts for a J III rear low-pressure system with various inlet valve configurations.
| Identifier | ExFiles\Box 151\2\ scan0066 | |
| Date | 12th April 1933 guessed | |
| Chart 1 (Top Left): Title: J III REAR 35/35 LB. LOW PRESSURE Date: 6-4-33 Subtitle: .250" EXT. PRESS INLET BALL VALVE. NO RELEASE VENTS. Subtitle 2: 4" STROKE Y-Axis: 308 LB/D" = 133 LB. X-Axis: 120" I.S. Legend: R.P.M. 180, 135, 90, 45 Legend: Gov. PRESS 4 LB/D" Annotation: 45 R.P.M - 0 LB/D" AFTER ABOVE TESTS Annotation: BEFORE TESTS Chart 2 (Top Right): Title: J III REAR 35/35 LB. LOW PRESSURE Date: 5-4-33 Subtitle: DISC VALVE DRILLED .062", IN EXT. PRESS INLET Subtitle 2: 4" STROKE Y-Axis: 308 LB/D" = 133 LB. X-Axis: 120" I.S. Legend: R.P.M. 180, 135, 90, 45 Legend: Gov. PRESS 4 LB/D" Annotation: 45 R.P.M. - 0 LB/D" BEFORE ABOVE TESTS Annotation: 45 R.P.M - 0 LB/D" AFTER ABOVE TESTS Chart 3 (Middle Left): Title: J III REAR 35/35 LB. LOW PRESSURE Date: 6-4-33 Subtitle: .250" EXT. PRESS INLET VALVE - 1 OFF .032" DIA. RELEASE VENT. Subtitle 2: 4" STROKE Y-Axis: 308 LB/D" = 137 LB. X-Axis: 120" I.S. Legend: R.P.M. 180, 135, 90, 45 Legend: Gov. PRESS 4 LB/D" Annotation: 45 R.P.M - 0 LB/D" BEFORE & AFTER TESTS. Chart 4 (Middle Right): Title: J III REAR 35/35 LB. LOW PRESSURE Date: 6-4-33 Subtitle: .250" EXT. PRESS INLET VALVE - 1 OFF .015" DIA. RELEASE VENT. Subtitle 2: 4" STROKE Y-Axis: 308 LB/D" = 133 LB. X-Axis: 120" I.S. Legend: R.P.M. 180, 135, 90, 45 Legend: Gov. PRESS 4 LB/D" Annotation: 45 R.P.M - 0 LB/D" BEFORE ABOVE TESTS Annotation: AFTER TESTS Chart 5 (Bottom Left): Title: J III REAR 35/35 LB. LOW PRESSURE Date: 6-4-33 Subtitle: WITHOUT EXT PRESS INLET VALVE. Subtitle 2: 4" STROKE Y-Axis: 308 LB/D" = 133 LB. X-Axis: 120" I.S. Legend: R.P.M. 180, 135, 90, 45 Legend: Gov. PRESS 4 LB/D" Annotation: 45 R.P.M - 0 LB/D" BEFORE ABOVE TESTS Annotation: AFTER TESTS. Stamp (Bottom Right): ROLLS-ROYCE. LTD. PRINT ROOM APR 30 1933 DERBY | ||