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).
Analysis of carburetter flooding issues on the Wraith model.
| Identifier | ExFiles\Box 7\4\ X 608 Carburetter-page20 | |
| Date | 20th April 1938 | |
| COPY FOR FILES. WRAITH. 608. 20th. April 1938. Carburetter DC.42. High Pressure Pump. .113 needle seating. level set at .625. S.G. of fuel .743. Thrust reqd. at needle to destroy float buoyancy at flooding point (level .540) = 29 grams. In order to cover an extremely bad float mechanism assume thrust at needle to be = 26 grams. .113 seating. Head in feet of petrol reqd. to flood carb. = 17.8 ft. .130 seating. Head in feet of petrol reqd. to flood carb. = 13.4 ft. Inspection of several needles and seats is satisfactory. The worst feature causing partial flooding is the torque reaction of the engine mounting. RM{William Robotham - Chief Engineer}/GR.{George Ratcliffe} | ||