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).
Sheet of four indicator diagrams for an engine with a standard exhaust manifold at various RPMs.
| Identifier | ExFiles\Box 66\2\ scan0031 | |
| Date | 27th February 1925 guessed | |
| DIAGMS WITH STANDARD EXH MANIFOLD E.A.C. SHEET 3 Graph 1: 2500. STD. 113 lbs B.M.E.P. = 79.5. Graph 2: 600 R.P.M. STD MANIFOLD 144 lbs. B.M.E.P. 101.5. Graph 3: 1500 STD. 143 B.M.E.P 100.9 Graph 4: 1000 STD. 143. B.M.E.P 100.9 | ||