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).
Report page with a graph analyzing heat flow in relation to engine speed (RPM) and water flow.
| Identifier | WestWitteringFiles\O\2January1926-March1926\ Scan94 | |
| Date | 14th January 1926 guessed | |
| contd :- -14- obtained at the various speeds. However the water flow in this particular case was considerably [handwritten: greater] greater, [handwritten: approx. 33 times] at 1000 r.p.m. than that which gave us the quickest heating from cold - it was therefore necessary to employ another method to see if the heat flow increased when the flow was decreased to the value which gave us our maximum rate of temperature rise on starting from cold. [Graph] Y-Axis: B.T.U'S/MIN. X-Axis: R.P.M. Top line: HEAT GIVEN TO CARBURETTOR BY EXH BOILER. Middle line: HEAT ADDED TO COOLING WATER. Bottom line: HEAT DEDUCTED BY CARB. This was done by taking the total heat flow to the jacket water with the system as arranged above and again with the reduced flow through the hot spot. Our apparatus was accurate to within about 1% per cent. but as the total heat flow was 3600 B.T.U/M.{Mr Moon / Mr Moore} at 1500 r.p.m. it was difficult to detect any difference between full bore and restricted flow contd . | ||