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 horsepower at the road wheels for a 40/50 HP engine under various loads.
| Identifier | WestWitteringFiles\L\July1924-September1924\ Scan29 | |
| Date | 1st September 1924 guessed | |
| SHEET. 4. 40/50 H.P. HEAT FLOW TO JACKET WATER FOR VARIOUS LOADS PLOTTED AGAINST H.P. AT ROAD WHEELS. B.T.U.S/MIN TO COOLING WATER. B.H.P. AT REAR WHEELS. 1/4 LOAD 1/2 LOAD FULL LOAD | ||