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).
Three low-pressure test graphs showing performance at different RPM and stroke settings.
| Identifier | ExFiles\Box 105\3\ scan0303 | |
| Date | 18th October 1932 | |
| Top Left Graph: 40/40 LB. 180 R.P.M. 1" STROKE LOW PRESSURE .250 DIA. GOVERNOR PIPES .250 HAT .005" CLEARANCE Y-Axis: 308 LBS/D" X-Axis: 120" I.S. Graph Data Labels: 80, 60, 30, N Top Right Graph: 40/40 LB. 540 R.P.M. 1" STROKE. LOW PRESS. .250 DIA. GOVERNOR PIPES .250" HAT .005" CLEARANCE Y-Axis: 308 LBS/D" X-Axis: 120" I.S. Graph Data Labels: 80, 60, 30, N Bottom Left Graph: 40/40 LB. 45 R.P.M. 4" STROKE. LOW PRESS. .250 DIA. PIPE LINE. 2ND RE-TEST AFTER DRYING CYLINDER. Y-Axis: 308 LBS/D" X-Axis: 120" I.S. Graph Data Labels: 80, 60, 30, N | ||