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).
Performance graph comparing 'JAPEN' silencer configurations on engine unit N G8.
| Identifier | ExFiles\Box 5a\5\ 05-page145 | |
| Date | 18th October 1938 guessed | |
| SILENCER COMPARISON ('JAPEN') ENGINE UNIT No. N G8 (5.25:1 COMP. RATIO) 120° LONG DURATION CAMSHAFT TWIN-CHOKE ZENITH CARB. (SMALL BORE IND. PIPE) COMPLETE FULL LONG TYPE EXHAUST SILENCER TO No. 368/V BUT SUPER PEAK & PERIOD DOWNTAKE PIPE FROM MANIFOLD VALVE TIMING 1020/1380 I.O. 12.5° ABDC E.O. 45° BBDC I.C. 52.5° ABDC E.C. 10° ATDC B.H.P B.M.E.P R.P.M V1159 | ||