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).
Power curve data table for the J.II Unit (L.B.) engine with specific settings.
| Identifier | ExFiles\Box 106\5\ scan0084 | |
| Date | 7th March 1933 | |
| -4- POWER CURVE FOR J.II UNIT (L.B.) Silent Tappets. Twin R.R. Carbs. Open Exhaust. Bar: 735. C.R. 6 : 1 Valve Timing - I.O. 0.8º B.T.D.C. I.C. 43.3º A.B.D.C. E.O. 44.1º B.B.D.C. E.C. 8º A.T.D.C. RPM. Load. c/Load. BHP. BMEP. Induction Pipe depn. Temp ºC. 3750 69.5 72.6 113.5 87.9 1.8 20 3500 76.0 79.4 116.0 96.0 1.7 20 3000 86.0 89.7 112.0 108.5 1.5 19 2500 92.5 96.5 100.5 117.0 1.2 20 2000 94.5 98.6 82.2 119.3 .85 19 1500 92.5 96.5 60.3 117.0 .60 20 1000 90.5 94.4 39.4 114.1 .25 19 750 88.0 92.0 28.8 111.5 .15 20 Hs{Lord Ernest Hives - Chair}/Std. | ||