Engine capacity, bore, and stroke for the 'Seagull' P1 Prototype engine.
| Identifier | Morton\M22\ img235 | |
| Date | 9th December 1922 | |
| To EFC. {E. Fowler Clarke - Electrical Engineer} from E. {Mr Elliott - Chief Engineer} ENGINE BORE & STROKE SEAGULL(Experimental EAC.1 aka Export chassis, Phantom I engine) 4¼ x 5½ E6/M9.12.22. X.3548 - RE "SEAGULL(Experimental EAC.1 aka Export chassis, Phantom I engine)" - P1 PROTOTYPE In reply to your query regarding the capacity of the "Seagull(Experimental EAC.1 aka Export chassis, Phantom I engine)" engine, this is for all practical purposes the same as the present 40/50, its bore being 4¼ and its stroke 5½. We have no information yet as regards the ratio of the starter gearing, but will write to you later on regarding this point. E. {Mr Elliott - Chief Engineer} | ||
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).