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).
The testing of 3-cylinder and 6-cylinder induction pipes for Eagle and Condor engines.
| Identifier | ExFiles\Box 37\4\ scan 052 | |
| Date | 23th March 1918 | |
| X.3094. COPY. EH1/LG23.3.18. March 23rd. 1918. X.1863 X.3273 X.2498 X.2497. INDUCTION PIPES 3 Cylinder Induction Pipes. X.3094. We made a set of pipes to LeC.904 and tested them on the six cylinder Eagle. The pipes were 1.75" bore and 42" long (the Condor length is 48" long) The HP chart is attached herewith. The distribution with these pipes was good, we should expect the consumption would be as good as we obtain on the Eagle but the consumption per HP hour was down owing to the HP being down. Seeing that the HP was down, we tried a similar pipe made from 2" bore pipe. This enabled us to maintain the power at 1700 r.p.m. but it fell away rapidly after that. If we use pipes on the Condor made to LeC.904, we shall have to make them proportionate to a 2" pipe on the Eagle, not the 1.75" standard pipe. 6 Cylinder Pipes. We have run tests on a six cylinder pipe fitted to a complete Eagle, the results of this test show that we must allow 2" diameter pipe on the Eagle to go between the cylinders, so that it appears as though the centre bearing on the Condor will have to be extended further. It might be agreed that it would be a good point to arrange the pipes so that the power fell off rapidly at high speeds, we consider Contd. | ||