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).
Power comparison chart for single and twin exhaust systems on a B60 N°3 Unit Chain Drive.
| Identifier | ExFiles\Box 123\1\ scan0013 | |
| Date | 5th December 1939 | |
| POWER COMPARISONS SINGLE & TWIN EXHAUST SYSTEMS. B 60 N°3 UNIT CHAIN DRIVE S. 110 5 . 12 . 39 Exs 1384 CYL. HEAD 109 1/2 CCS GASKET .030" C/R 7.1/1 EB 4726 CAMSHAFT I.O. 10° AT I.C. 30.8° AB E.O. 41.5° BB E.C. 2.5° BT{Capt. J. S. Burt - Engineer} B.Y IND SYSTEM TWIN 1 1/2" SU'S. VARIABLE AIR SILENCER FITTED KEY: Dashed line: OPEN EXHAUST MINUS AIR SILENCER Line with 'x': TWIN SILENCER COMPLETE WITH AIR SILENCER FITTED (CORNICHE TYPE) Line with 'o': SINGLE SILENCER COMPLETE WITH AIR SILENCER FITTED (BX TYPE) FUEL 'Pool' DIAGRAMS: SKETCH OF ONE SILENCER OF THE CORNICHE TYPE TWIN SYSTEM. FRONT & REAR BOXES ARE ALIKE. PIPES & BOXES 16 S.W.G (.064") Dimensions/Labels: 1" 3/4 DIA. PIPES, 6" DIA., 18", 2" DIA., 1" 3/4 DIA. BX TYPE SINGLE SILENCER ALL PIPES 2" DIA. PIPES & BOXES 16 S.W.G.(.064") Dimensions: 8", 18", 16", 6" DIA. AXIS LABELS: Y-AXIS LEFT: B.H.P Y-AXIS RIGHT (TOP): B.M.E.P Y-AXIS RIGHT (BOTTOM): BACK PRESSURE Hg" X-AXIS: R.P.M. SIGNATURE: RM{William Robotham - Chief Engineer}/C. CAISLEY | ||