Blueprints and design considerations for a Lighter Phantom Engine.
| Identifier | WestWitteringFiles\O\April1926-June1926\ Scan3 | |
| Date | 1st April 1926 | |
| TO R. {Sir Henry Royce} FROM E. {Mr Elliott - Chief Engineer} Copy to - CJ. HS. {Lord Ernest Hives - Chair} BY ORIGINAL E3/M1.4.26. re. LIGHTER PHANTOM ENGINE. X8840 X8770 Please find herewith blue prints of LeC. 2229. & 2230., shewing the above. The former shews the general arrangement of the engine. The head has been drawn to suit a compression ratio of 4.5 to 1. The sparking plug points are higher up than we should prefer in the combustion space, but taking everything into consideration the position shewn was thought to be best. It would be possible to use two water ways and drop the sparking plug between them on the offside of the engine but on the nearside there is not sufficient room to get the waterways wide enough apart to do much goodin lowering the plug. The alterations to the valve gear necessitated by the modified head are dealt with on LeC.2229. as also are the alteration to the oil feed for the rockers. We can make up a head and piston to give the effect shewn on LeC.2230. as an alternative form of combustion chamber with very little trouble, by leaving some metal on the LeC.2229. castings. This would be a means of testing a higher compression. LeC. 2230. made to the lower compression ratio of 4.5 to 1 would bring the sparking plugs lower down the walls. The originals of these drawings are attached to BY's copy of this memo. E. {Mr Elliott - Chief Engineer} Handwritten notes: ACL / HS {Lord Ernest Hives - Chair} Please look up these Dwgs HS {Lord Ernest Hives - Chair} Shall rec. blue-prints of these shortly, ACL. | ||
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).