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 analyzing losses in a Phantom II short type silencer exhaust system.
| Identifier | ExFiles\Box 14\6\ Scan225 | |
| Date | 2nd November 1931 guessed | |
| LOSSES TO EXHAUST SYSTEM PII. ANALYSIS OF COMPLETE PH. II SHORT TYPE SILENCER 4.6 C/R.{Sir Henry Royce} 108° MASKED VALVE CAMSHAFT TWIN CARBS. 1.4 THROATS B.H.P. B.M.E.P. R.P.M. ① OPEN EXHAUST ② MAIN EXPANSION BOX REMOVED ③ FISH TAIL REMOVED ④ COMPLETE PH. II SHORT TYPE EXHAUST SYSTEM | ||