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 six performance graphs for the J.III. Rear component under varying low and high pressure conditions.
| Identifier | ExFiles\Box 105\3\ scan0297 | |
| Date | 11th November 1935 guessed | |
| Graph 1: J.III. REAR. 90/90 LB. LOW PRESSURE .250 HAT. .005" CLEARANCE PISTON VENTS .032" x .032" 4" STROKE. "25 - 30˚c. R.P.M. 250, 180, 135, 90, 45, 22 Date: 18 . 10 . 32 Graph 2: J.III. REAR. 90/90 LB. LOW PRESSURE .250 HAT. .005" CLEARANCE PISTON VENTS .032" x .032" 4" STROKE. 60˚c R.P.M. 250, 180, 135, 90, 45, 22 Date: 18-10-32 Graph 3: J.III. REAR. 90/90 LB. LOW PRESSURE .250 HAT. .005" CLEARANCE PISTON VENTS .032 x .032 4" STROKE. AFTER RECOOLING R.P.M. 250, 180, 135, 90, 45, 22 Date: 19 . 10 . 32 Graph 4: J.III. REAR. 90/90 LB. HIGH PRESSURE .250 HAT. .005" CLEARANCE PISTON VENTS .032" x .032" 4" STROKE. 25-30˚C. 1ST RUN UP R.P.M. 250, 180, 135, 90, 45, 22 Date: 18 . 10 . 32 Graph 5: J.III. REAR. 90/90 LB. HIGH PRESSURE .250 HAT. .005" CLEARANCE PISTON VENTS .032" x .032" 4" STROKE. 60˚c R.P.M. 250, 180, 135, 90, 45, 22 Date: 18 - 10 - 32 Graph 6: J.III. REAR. 90/90 LB. HIGH PRESSURE .250 HAT. .005" CLEARANCE PISTON VENTS .032" x .032" 4" STROKE. AFTER RECOOLING. R.P.M. 250, 180, 135, 90, 45, 22 Date: 18 - 10 - 32 Common Labels: Y-Axis: 308 LB/D" = 133 LB B.P. X-Axis Start: 120 'I.S Graph Identifiers: ①, ②, ③, ④, ⑤, ⑥ | ||