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).
Analysis of power loss to a large resonant exhaust system for a Phantom (8 Litre) engine.
| Identifier | ExFiles\Box 14\6\ Scan299 | |
| Date | 24th February 1934 | |
| PHANTOM (8 LITRE) ANALYSIS OF POWER LOSS TO LARGE RESONANT EXHAUST SYSTEM MANIFOLD DOWNTAKE PIPE AND FRONT EXP BOX 1ST BEND MAIN PIPE OUTER SHELL TOP HAT SWAN NECK END BAFFLE BHP RPM ① COMPLETE SILENCER AS PER SKETCH ② SWAN NECK REMOVED ③ END BAFFLE REMOVED OTHERWISE AS ② ④ TOP HAT REMOVED, END OF MAIN PIPE BLANKED. OTHERWISE AS ③ ⑤ COMPLETE LENGTH OF MAIN PIPE OPEN ENDED 1ST AND 2ND SERIES OF HOLES BLANKED. * IF MAIN PIPE BE REMOVED LEAVING ON 1ST BEND THE POWER FIGURES ARE EXACTLY THE SAME ⑥ 1ST BEND REMOVED LEAVING DOWNTAKE AND EXP BOX ⑦ MANIFOLD ONLY ⑧ 9'00 LENGTH STRAIGHT PIPES FROM EACH PORT 10 INS BACK PRESS IN MANIFOLD INS HG PHS | ||