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 from tests on Weir induction pipes, showing BHP and BMEP against engine RPM.
| Identifier | ExFiles\Box 66a\2\ scan0184 | |
| Date | 29th March 1928 guessed | |
| WEIR INDUCTION PIPES TESTS. SHEET II V253. ④ {INDUCTION PIPE & FISHTAIL (WITH NOZZLE) TO SCH 965. (ONE PIECE PIPE). HOT SPOT PIPE TO V243 (CARB. IN STD. POSITION). ⑤ DITTO, BUT WITHOUT NOZZLE IN FISHTAIL. ③ STANDARD INDUCTION PIPE. BRAKE HORSE POWER B.M.E.P (LBS/□") ③ ④ ⑤ B.H.P. ③ ④ ⑤ B.M.E.P. FOR CONDITIONS OF TESTS, SEE SHEET I. R.P.M. OF ENGINE. | ||