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 B.HP loss on a big bore Bentley exhaust system.
| Identifier | ExFiles\Box 86\3\ scan0110 | |
| Date | 29th November 1935 guessed | |
| 4223 ANALYSIS OF B.H.P. LOSS ON BIG BORE BENTLEY EXHAUST SYSTEM B.H.P.@ 3750 RPM. B.H.P.@4500 B.H.P. LOSS @ 3750 B.H.P. LOSS @ 4500 (1) OPEN EXHAUST 131.00 112.00 NIL NIL (2) MANIFOLD FITTED. 127.50 110.00 3.50 2.00 (3) STANDARD DOWNTAKE PIPE, FRONT EXPN BOX, 123.00 100.50 8.00 11.50 INTERMEDIATE PIPE AND 1ST SILENCER FITTED. (4) AS 3 BUT WITH 2ND INTER PIPE FITTED. 120.50 98.00 10.50 14.00 (5) AS 4 BUT WITH STD REAR SILENCER FITTED. 114.00 91.50 17.00 20.50 (6) AS 4 BUT WITH R.M.10 REAR SILENCER FITTED. 116.00 91.50 15.00 20.50 (7) AS 5 BUT WITH TAIL PIPE FITTED. 113.00 90.00 18.00 22.00 (8) AS 6 BUT WITH TAIL PIPE FITTED. 115.00 90.00 16.00 22.00 (9) ANTI-BOOM FISH TAIL FITTED TO 111.00 86.00 20.00 26.00 STANDARD SYSTEM. (10) STRAIGHT THRO' DOWNTAKE PIPE AND 116.50 97.00 14.50 15.00 MODIFIED TYPE 1ST SILENCER ONLY. (11) AS 10 BUT WITH INTER PIPE. R.M.10. REAR 111.50 88.50 19.50 23.50 SILENCER AND TAIL PIPE FITTED. INDIVIDUAL UNIT LOSSES (1) MANIFOLD. 3.50 2.00 (2) STANDARD DOWNTAKE PIPE, FRONT EXPN BOX, 4.50 9.50 INTER PIPE AND 1ST SILENCER. (3) 2ND INTER PIPE. 2.50 2.50 (4) STANDARD REAR SILENCER. 6.50 6.50 (5) R.M.10. REAR SILENCER. 4.50 6.50 (6) TAIL PIPE. 1.00 1.50 (7) FISH TAIL. 2.00 4.00 (8) STRAIGHT THRO' DOWNTAKE PIPE AND 11.00 13.00 MODIFIED TYPE 1ST SILENCER. (9) AS 8 WITH INTER PIPE R.M.10. REAR 19.50 23.50 SILENCER AND TAIL PIPE. | ||