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 showing the effect of a cylinder barrel's presence on air flow and comparing two different cylinder head models.
| Identifier | ExFiles\Box 86\1\ scan0040 | |
| Date | 30th November 1933 guessed | |
| BENTLEY SHEET 2 CURVES SHOWING EFFECT OF PRESENCE OF CYLINDER BARREL ON AIR FLOW, AND COMPARISON OF CYL: HEADS EB.615 (STD) AND L.E.C. 3673 AIR FLOW - CU.FT. / MIN: PRESS. DIFFERENCE ACROSS VALVE - INS. HG. L.E.C. 3673 MODEL CYL. BARREL ATTACHED (VALVE DIA: - 1.5") L.E.C. 3673 MODEL CYL: BARREL REMOVED (VALVE DIA: - 1.5") STD. EB.615 MODEL CYL: BARREL ATTACHED (VALVE DIA: - 1.4") STD. EB.615 MODEL CYL: BARREL REMOVED (VALVE DIA: - 1.4") ALL TESTS AT FULL LIFT i.e. 0.400" | ||