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).
Secret memo detailing a minor modification to the Spectre Silencer to improve exhaust flow.
| Identifier | ExFiles\Box 93\1\ scan0025 | |
| Date | 29th August 1935 | |
| GRY{Shadwell Grylls} WYM{G. Harold Whyman - Experimental Manager} X323 To PY. from E/JNR.{Charles L. Jenner} SECRET. E/JNR.{Charles L. Jenner}2/HP.29.8.35. c. RHC{R. H. Coverley - Production Engineer} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} re SpectreCodename for Phantom III Silencer. Noted [Signature] We send you herewith:- LeC.4666 showing a minor modification to the inside of the silencer at the forward end. The inaccuracies of the parts which we are told we must expect are such that they result in restricting the exhaust flow. To overcome this we have shaped the outer pipe with a large radius where it is fixed to the front baffle. E/JNR.{Charles L. Jenner} | ||