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).
Schematic for an automatic starting and warming-up control for horizontal carburettors, including a vapour pressure graph.
| Identifier | ExFiles\Box 4\1\ 01-page049 | |
| Date | 17th July 1939 | |
| LEC3835 Ex. 13268 Ex. 13269 Ex. 13260 Ex. 13265 Ex. 5645 Ex. 13262 Ex. 13261 Ex. 13266 Ex. 13264 THERMOFLEX NAE BELLOWS. THE POCKET IS SIMILAR TO A THERMOMETER POCKET. IT SHOULD BE APPRECIATED THAT THIS CONTROL APPLIED TO AN R.R. HOR. CARB. WILL BE SMALLER AND NEATER THAN THE ABOVE. Graph: - Y-Axis: TEMPERATURE °C - X-Axis: VAPOUR PRESSURE LBS/SQ ABS - FOR THE PURPOSE OF TESTING OUT THIS SCHEME OF AUTOMATIC STARTING AND WARMING UP CONTROL AN S.U. CARB. CAN BE USED MODIFIED AS SHOWN AND SHOULD BE FITTED TO A CAR WITH AN THERMOSTATICALLY CONTROLLED BYE-PASS WATER SYSTEM. THE POCKET AND BELLOWS SHOULD BE PARTLY FILLED WITH ETHYL ALCOHOL AND ALL AIR BOILED OUT BEFORE SEALING. THE BELLOWS WILL THEN CONTAIN ONLY LIQUID AND VAPOUR ETHYL ALCOHOL AND THE PRESSURE INSIDE WILL VARY WITH TEMPERATURE ACCORDING TO THE ABOVE CURVE. THE BELLOWS ARE THEIR NORMAL LENGTH IN THE POSITION SHOWN WHICH CORRESPONDS TO A TEMP. OF 75°C. AT A TEMP OF 15°C THE BELLOWS WILL HAVE CONTRACTED APPROX .175". IF THIS MOVEMENT IS NOT SUFFICIENT THEN MORE FLEXIBLE BELLOWS SHOULD BE USED. SCALE 1/4 - AUTOMATIC STARTING & WARMING UP CONTROL - HOR. CARBS - A.F.P. 17.7.39 AERO & S.U. DEPT. LTD. QUAL. TY DEPT. FILE 26/1029 DERBY LEC3835 | ||