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).
Graph showing the results of exhaust silencer tests for the Phantom II engine.
| Identifier | ExFiles\Box 104\2\ scan0025 | |
| Date | 2nd June 1932 | |
| P.T. 25. UNIT PHANTOM II EXHAUST SILENCER TESTS PD COMP. RATIO 5.25 : 1 W.W. (T.A.C) CAMSHAFT STANDARD IRON SYSTEM. STANDARD MANIFOLD. EXPN BOX & INTERMEDIATE PIPE. WITH :- (A) STANDARD P.I (SHORT TYPE) SILENCER (B) EXPTL. RESONANCE SILENCER BACK PRESS. (EXHAUST) "Hg B.H.P. B.M.E.P R.P.M. As B SWAN NECK REMOVED | ||