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).
Standardising the ventilation of the 20 HP distributor, referencing the New Phantom.
| Identifier | ExFiles\Box 61b\2\ scan0024 | |
| Date | 15th January 1926 | |
| X5690 To RHC.{R. H. Coverley - Production Engineer} from EFC. EFC4/T15.1.26. RE VENTILATION OF DISTRIBUTOR - 20 HP. On chassis 10-GIII for the 10,000 mile test we should be pleased if you would arrange for the distributor head and base to contain those two items of what we are standardising for the New PhantomCodename for PHANTOM I as may be considered also to be applied to the 20 HP.,for instance, (1) Second ventilating window in dist. head. (2) Hole in contact breaker base immediately under contact breaker points for more effective ventilation. For this purpose we are handing you back one of the two distributors provided with these items which you recently handed to us. As regards the other items, it may be considered that the 20 HP. governor housing already embodies in its construction what may be considered to be an effective trap for the exclusion of crankchamber gases. This will answer your query in connection with our instruction EFC3/T30.12.25. The distributor head on 10-GIII has had stainless steel sparking points, and we would like, as these are also proposed for standardisation, to retain this item, at the same time as the other items. This can be done by adding the window to the existing distributor head. With this end in view we have retained the distributor head | ||