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 comparing three different Weir induction pipe configurations by plotting Brake Horse Power and Brake Mean Effective Pressure against engine RPM.
| Identifier | WestWitteringFiles\R\2December1927-February1928\ Scan188 | |
| Date | 16th February 1928 | |
| WEIR INDUCTION PIPES TESTS. SHEET I. V252. ① { INDUCTION PIPE & FISHTAIL (WITH NOZZLE) TO SCH. 965. (ONE PIECE PIPE) HOT SPOT PIPE TO SCH. 965. ② DITTO, BUT WITHOUT NOZZLE IN FISHTAIL. ③ STANDARD INDUCTION PIPE. BRAKE HORSE POWER B.M.E.P. (LBS/SQ IN) R.P.M. OF ENGINE. ① ② ③ B.H.P. ① ② ③ B.M.E.P. CONDITIONS OF TESTS: LIGHTER PHANTOM II No AU25: COMPRESSION RATIO = 4.65 STANDARD CAMSHAFT. ANTI-DETONATING TYPE CYL. HEAD. STANDARD CARBURETTORS. STD. TEST BED EXHAUST SYSTEM. AHP 16-2-28 | ||