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).
Engine testing relating to fuel collection in the volute and fuel distribution in the induction system.
| Identifier | WestWitteringFiles\U\January1930-April1930\ Scan073 | |
| Date | 25th January 1930 guessed | |
| -3- found remaining in the volute. The test was next repeated with the suction drain removed and at the end of a quarter of an hour 100 c.c. of fuel had collected in the volute. This represents very severe conditions because normally the mixture is set much weaker than for these tests. A tests was next made with the suction drain in operation and after ticking over for a quarter of an hour from cold - the engine had been standing all night in the open - the engine opened up to full throttle without any choking. At the moment we are taking the pipe from the venturi into the right hand rear manifold which results in those three cylinders - which are supplied by that manifold being over rich during warming up due to them dealing with all the fuel which would otherwise collect in the volute. Our only remaining problem in this connection therefore appears to be the selection of the best place in the induction system in which to feed the fuel precipitated in the volute. We naturally wish to distribute this fuel as evenly as possible between all twelve cylinders. At the present time we are arranging a test in which we shall feed the fuel into the top of the induction pipe approximately midway along its length. The entry will be in the form of a 'pepper box' nozzle. We will report on this test as soon as completed. So far we have reached the present stage of | ||