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).
Page two of a test report discussing engine temperatures and the design of the exhaust and intake manifold.
| Identifier | ExFiles\Box 14\6\ Scan115 | |
| Date | 12th November 1929 guessed | |
| -2- The temperatures recorded during this test are considerably higher than encountered on a road test, the max. road test temperature being approx. 300°C. The arrangement was slightly different for the road test because the outlet pipe after passing through the small silencer entered into the swan neck at the rear of the silencer. This, and a certain amount of air cooling derived from the fan, would probably account for the lower temperature recorded on the road test. We have not experienced any disadvantage due to the high hot spot temperature . The jacket area is smaller than used on the F2B Series Phantom. For hot spots we rather favour a high temperature over a small area near the carburetter to moderate temperatures over large areas. We think, however, with a system of this type it would be preferable to employ cast iron hot spot bends. Appended is a print of the experimental silencer we employed and power and temperature curves. HS{Lord Ernest Hives - Chair}/ACL. | ||