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).
Departmental memo discussing engine trouble accentuated by the induction pipe cock during retardation after running at high speeds.
| Identifier | ExFiles\Box 1\3\ B001_X 93-page22 | |
| Date | 3rd May 1912 | |
| 475. (30 H) (X 896. 3-5-12) E.P. 1780. ROLLS-ROYCE LIMITED, NIGHTINGALE ROAD, DERBY. TELEGRAMS: "ROYCAR," DERBY. TELEPHONES: 813 (Two Lines). DEPARTMENTAL MEMO. This column is for Name of Person addressed. DATE. 2/ It is a fact that the opening of the induction pipe cock on the retard accentuates the trouble. This trouble chiefly happens after the engine has been running at pretty high speeds under full power conditions such as one gets by ascending a hill, and then allowed to retard, that is decending the hill. The question of petrol being in the induction pipe has also been previously demonstrated by other tests, after accellerating and then retarding, the engine governs better by setting the carburettor while engine is retarding temporary weak. Under these conditions the engine fires immediately the throttle opens but soon commences to fail until the carburettor is again set normal. Again the fact of opening the induction pipe cock during retardation and closing again as soon as the throttle commences to open causes the engine to do the same. (Cont) 3 This sheet must be filed with the correspondence to which it refers. | ||