Hand-drawn graph plotting engine pressure against crank angles, detailing induction and exhaust cycles at 3500 rpm.
| Identifier | ExFiles\Box 134\1\ scan0076 | |
| Date | 24th January 1938 guessed | |
| Y-Axis: +4 lb/in^2, +2, Atmospheric, -2, -4 lb/in^2 X-Axis: Crank Angles -> Graph Data & Annotations: 3500 rpm. Press in Inlet stub Induction Press. in cyln. Exhaust B.D.C. T.D.C. Notes: Normal valve timing. Inlet opens about 10° early. Exhaust closes 20° late. Fig 2. | ||
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).