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 effects of using 100% benzol, spark plug trials, and altitude corrections for supercharged engines.
| Identifier | ExFiles\Box 36\2\ scan 148 | |
| Date | 28th January 1928 guessed | |
| contd :- -2- rated altitude. The effect of using 100% benzol. It will be seen that higher power figures are obtained when using 100% benzol. This is attributable to the lower mixture pipe temperatures obtained, owing to the greater latent heat of pure benzol, which also has the effect of increasing the efficiency of the supercharger. 100% benzol was used on previous tests, owing to a certain amount of over-oiling experienced with the old supercharger on the F.X. engine, which precluded the use of a cool running plug similar to the Champion R.11 at present fitted to the supercharged F.XI engine. Sparking plugs. Various types of K.L.G. and Lodge plugs are being tried in conjunction with the supercharged engine, in order to establish a suitable British plug which will stand up to these conditions. Modified A.M. corrections for altitude conditions. Recent modifications to the altitude corrections supplied by the A.M. are being investigated. If the new corrections are suitable, a report will follow giving altitude power curves modified accordingly. Hs{Lord Ernest Hives - Chair}/V.Halliwell. | ||