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 graphs illustrating 2' stroke low-pressure performance at various RPMs and temperatures.
| Identifier | ExFiles\Box 105\3\ scan0299 | |
| Date | 11th November 1935 guessed | |
| Graph 1: 90/90 LB. 2" STROKE. LOW PRESS. COLD-25°C ATMOSPHERIC INLET ON EACH SIDE OF HAT. B.P. LOAD 140 LB. DROPPING TO 110 LB. .250 HAT .005 CLEARANCE Y-Axis: 308 LBS/□" X-Axis: 120" I.S. R.P.M 360 260 180 90 Figure No: 10 Graph 2: 90/90 LB. 2" STROKE. LOW PRESS. 60°C ATMOSPHERIC INLET ON EACH SIDE OF "HAT" Y-Axis: 308 LBS/□" X-Axis: 120" I.S. R.P.M 360 260 180 90 Figure No: 11 Graph 3: 90/90 LB. 2" STROKE LOW PRESS. AFTER RE-COOLING ATMOSPHERIC INLET ON EACH SIDE OF "HAT" Y-Axis: 308 LBS/□" X-Axis: 120" I.S. R.P.M 360 260 180 90 Figure No: 12 | ||