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 jacket water against brake horsepower at the road wheels for a 40/50 HP engine at various loads.
| Identifier | ExFiles\Box 38\2\ Scan230 | |
| Date | 11th September 1924 guessed | |
| SHEET. 4. 40/50 H.P. HEAT FLOW TO JACKET WATER FOR VARIOUS LOADS PLOTTED AGAINST H.P. AT ROAD WHEELS. Y-AXIS: B.T.U.s/MIN TO COOLING WATER. X-AXIS: B.H.P AT REAR WHEELS. DATA LABELS: FULL LOAD, 1/2 LOAD, 1/4 LOAD | ||