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).
Slow running tests comparing engine vibrations with different carburetter and induction pipe setups.
| Identifier | ExFiles\Box 155\1\ scan0206 | |
| Date | 6th April 1936 | |
| X206 Hs{Lord Ernest Hives - Chair}/FD.{Frank Dodd - Bodies}15/KW.6.4.36. 6-B-IV. Slow running tests to ascertain the values of - (1) Small carburetters and small induction pipe. (2) Large carburetters and small induction pipe. (3) Large carburetters and large induction pipe. Engine vibrations were recorded by chronograph, the ignition was set at 13° fully advanced on the hand control. Two readings were recorded in each test, with the ignition fully advanced hand control, and in the half advanced position T.D.C. on the flywheel, at the engine speeds of 450 & 350 r.p.m. respectively. In all tests the tappets were set at exhaust .006", inlet .004"; the water temp. at the start of each test being 85° and rising to 95°C. [Table Data] Test 1, Small Carbs. small ind. pipe. Test 2, Large Carbs. small ind. pipe. Test 3, Large carbs., large ind. pipe. Row Labels / Test 1 (Full adv., Half adv.) / Test 2 (Full adv., Half adv.) / Test 3 (Full adv., Half adv.) Maximum deflection on chronograph strip. / .050" .050" / .100" .100" / .150" .200" Length of series of large deflections. / 1.000" 1.500" / 2.750" 5.00" / 11.00" 9.00" Length of fairly steady vibrations. / 9.000" 8.500" / 3.500" 2.00" / 2.00" 2.00" | ||