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 engine vibration tests using different carburetter and induction pipe configurations.
| Identifier | ExFiles\Box 85\4\ scan0164 | |
| Date | 6th April 1936 | |
| 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 --- Row: Maximum deflection on chronograph strip. - Test 1 (Small Carbs. small ind. pipe): Full adv: .050", Half adv: .050" - Test 2 (Large Carbs. small ind. pipe): Full adv: .100", Half adv: .100" - Test 3 (Large carbs., large ind. pipe): Full adv: .150", Half adv: .200" Row: Length of series of large deflections. - Test 1 (Small Carbs. small ind. pipe): Full adv: 1.000", Half adv: 1.500" - Test 2 (Large Carbs. small ind. pipe): Full adv: 2.750", Half adv: 5.00" - Test 3 (Large carbs., large ind. pipe): Full adv: 11.00", Half adv: 9.00" Row: Length of fairly steady vibrations. - Test 1 (Small Carbs. small ind. pipe): Full adv: 9.000", Half adv: 8.500" - Test 2 (Large Carbs. small ind. pipe): Full adv: 3.500", Half adv: 2.00" - Test 3 (Large carbs., large ind. pipe): Full adv: 2.00", Half adv: 2.00" | ||