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).
Five graphs comparing engine manifold performance at 2000 RPM.
| Identifier | ExFiles\Box 66\2\ scan0032 | |
| Date | 27th February 1925 guessed | |
| SHEET 4 MANIFOLD COMPARISONS AT 2000 R.P.M. Top Left Graph: SINGLE EX PIPES TO EACH CYL. 2000 R.P.M. 141 lbs. Top Right Graph: 2000 R.P.M. LARGE MANIFOLD 137 lbs. Middle Left Graph: COMPN 2000 R.P.M. SINGLE PIPES. Middle Right Graph: 2000 RPM LARGE MANIFOLD Bottom Left Graph: 2000 R.P.M. STD MANIFOLD 131 lbs. Y-Axis Scale: 0, 1, 2, 3, 4 X-Axis Scale: 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150 lbs/sq in | ||