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 effect of water jackets on exhaust ports on the total water jacket heat for a Phantom III standard engine.
| Identifier | ExFiles\Box 94\3\ scan0190 | |
| Date | 26th April 1937 guessed | |
| CURVES SHOWING EFFECT OF WATER JACKETS OF EXHAUST PORTS ON TOTAL WATER JACKET HEAT ON PH. III STD. ENGINE HEAT - B.T.H.U'S / MIN. ENGINE SPEED - R.P.M. % INCREASE IN TOTAL HEAT DUE TO JACKETTING OF PORTS SHEET 2 ① TOTAL HEAT TO COOLING WATER WITH STD. HEAD WITH EXHAUST PORT JACKETS ② TOTAL HEAT TO COOLING WATER WITHOUT EXHAUST PORT JACKETS ③ % INCREASE IN TOTAL HEAT TO COOLING WATER DUE TO EXHAUST PORT JACKETS | ||