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).
Experiments on an exhaust-heated hot spot for the Phantom II engine.
| Identifier | ExFiles\Box 13\3\ 03-page119 | |
| Date | 23th October 1929 | |
| To R.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}/ACL. c. BS.{A J. Barnes - Assistant Manager} c. MOT. E.{Mr Elliott - Chief Engineer} c. DA.{Bernard Day - Chassis Design} EV.{Ivan Evernden - coachwork} PHANTOM II EXHAUST HEATED HOT SPOT. We have carried out a number of experiments with exhaust heating to the hot spot jacket of Phantom II engine. The hot spot was connected with the passage leading from the centre exhaust port by a 3/4" dia. pipe. The exhaust outlet from the hot spot was discharged through a small silencer into the atmosphere. The exhaust circulation through the hot spot therefore took place, due to the back pressure of the engine exhaust system. Very quick warming up resulted when starting up from cold and in a very short space of time the engine would operate on a normal mixture. Readings were taken on the test bed of the hot spot temperature - by means of a thermo couple - and also a comparison of the power output with exhaust and water heating. The thermo couple was screwed down under the outlet pipe union from the bottom of the hot spot, and the max. temperature recorded was 460°C. which was reached at 2500 R.P.M. full throttle. There was no appreciable loss in power except about one H.P. at the lower speeds. | ||