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 power curves and losses for the Wraith III engine with different silencer and exhaust setups.
| Identifier | ExFiles\Box 6\6\ 06-page234 | |
| Date | 15th June 1937 | |
| Nº 1 UNIT. WRAITH III POWER & LOSS TO SILENCERS ① OPEN EXHAUST ② COMPLETE STD EXHAUST SYSTEM PLUS AIR BEND AND SILENCER ③ AVERAGE 25/30 ENGINE B.H.P Exh. Back Press. "Hg R P M S.H.P M.E.P. Dº/BHP.H. WRAITH III I.O. 1º A.T. I.C. 41º A.B. E.O. 47º B.B. E.C. 8º B.T. 25/30 I.O. 6º A.T. I.C. 44º A.B. E.O. 44º B.B. E.C. 5º A.T. | ||