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 showing the heat flow to cooling water with increasing exhaust back pressure for an E.A.C. engine at a constant 1500 RPM and 50 B.HP
| Identifier | WestWitteringFiles\M\2April1925-June1925\ Scan42 | |
| 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. B.TH.U. PER MIN. % AGE OF POWER GIVEN WITH NORMAL AMT BACK PRESS. % BACK PRESS'O RELATIVE TO NORMAL. 50x100 H.P. WITH NORMAL BACK PRESS. A.C.L. 29/4/25 27/4/25 30 APR 1925 | ||