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 results of exhaust silencer tests on a Phantom II unit.
| Identifier | ExFiles\Box 152\3\ scan0084 | |
| Date | 2nd June 1932 | |
| P.T. 25. UNIT, PHANTOM II, EXHAUST SILENCER TESTS, PD, COMP RATIO 5.25:1, MK.{R. E. B. Meade-King} II CAMSHAFT, STANDARD IRON SYSTEM, STANDARD MANIFOLD EXPN BOX, & INTERMEDIATE PIPE. WITH :-, Ⓐ STANDARD PITCHFORT SILENCER, Ⓑ EXPTL. RESONANCE SILENCER, BACK PRESS. (EXHAUST) " Hg, B.H.P, B.M.E.P, RPM, AS B, SWAN NECK REMOVED, SWAN NECK REMOVED | ||