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).
Table showing actual valve timings taken from an engine during twin carburettor tests on 'Japan'.
Identifier | ExFiles\Box 122\1\ scan0062 | |
Date | 27th May 1930 | |
ACTUAL VALVE TIMING TAKEN ON ENGINE WITH .020 TAPPET CLCE. CAMSHAFT. | 116° | 112° | 110° IN. OPENS | 13° A.T.C. | 7° A.T.C. | 16° A.T.C. IN CLOSES | 48° A.B.C. | 43° A.B.C. | 37° A.B.C. EX. OPENS | 42° B.B.C. | 43° B.B.C. | 28 B.B.C. EX CLOSES | 2° A.T.C. | 5° A.T.C. | 4° A.T.C. ABOVE ARE THE BEST TIMINGS FOUND DURING TWIN CARB TESTS ON "JAPAN." [STAMPED TEXT] [ROLLS-R]OYCE, LIMITED [DEVELOP]MENT ROOM, 27 MAY 1930 DERBY. [HANDWRITTEN INITIALS] aek | ||