Performance graph comparing engine output with and without an AC Air Silencer for a J.3 Head unit.
| Identifier | ExFiles\Box 13\4\ 04-page062 | |
| Date | 3rd November 1932 guessed | |
| UNIT C.D. 20/25 J.3 HEAD A.C. AIR SILENCER 6.3:1 COMP. RATIO E6777 (No. 12) CAMSHAFT 2 - 1.625 S.U. CARBS. ① WITH A.C. SILENCER ② SILENCER REMOVED | ||
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).