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).
Graph plotting heat flow to cooling water against increasing exhaust back pressure for an E.A.C. engine at 1500 RPM and 50 B.HP
| Identifier | ExFiles\Box 66\2\ scan0053 | |
| Date | 27th April 1925 | |
| HEAT FLOW TO COOLING WATER. WITH INCREASING EXHAUST BACK PRESSURE. E.A.C. ENGINE. AT 1500 RPM. AND 50 B.H.P. THE SPEED & H.P. IS CONSTANT FOR THIS TEST. AS THE EXH. BACK PRESSURE IS INCREASED THE POWER IS KEPT THE SAME BY INCREASING THE THROTTLE OPENING. Y-Axis: B.Th.Us PER MIN. X-Axis (top): %AGE OF POWER GIVEN WITH NORMAL AMT BACK PRESS. X-Axis (bottom): % BACK PRESS'O RELATIVE TO NORMAL. Data points label: NO 3. Bottom right note: A.C.L. 29/4/25 Bottom right formula: 50x100 / HP WITH NORMAL BACK PRESS. | ||