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).
Graph comparing engine specific jacket heat figures with American figures.
| Identifier | ExFiles\Box 94\3\ scan0185 | |
| Date | 22th April 1937 guessed | |
| SHEET (6) COMPARISON OF R R ENGINE SPECIFIC JACKET HEAT FIGURES WITH AMERICAN FIGURES Y-AXIS: SPECIFIC HEAT TO JACKET FIGURE - B.T.H.U.'S / MIN / LITRE DISPLACEMENT X-AXIS: ENGINE R.P.M. LEGEND: ① 25/30 H.P. ENGINE (4,250 cc) ② BENTLEY " (4,250 cc) ③ AV. OF 1935 AMERICAN O.H.V. ENGINES (FROM SAUNDERS PAPER) ④ CONTINENTAL PH. III ENGINE (7,330 cc) | ||