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).
Tests conducted on carburetor passages to rectify a fault, concluding a design change is necessary.
| Identifier | ExFiles\Box 102\1\ scan0219 | |
| Date | 8th October 1934 | |
| -2- It has been proved that the passage (1) is very sensitive at the opening (N) and it has been noticed on faulty carburetters that this opening is situated in a position slightly above the floor (O), (i.e. the bottom of the hole (N) is not level with the floor (O)). When the size of this opening (N) was increased, and at the same time the bottom of the hole filed to the level of the floor (O) a complete cure was brought about. The reason we put forward for this is that the depression at the passage (3) is relieved by taking further advantage of the disturbance of air at the point (N). Also, when the throttle edge hole (C) was blanked up, a complete cure resulted. Furthermore, when a separate passage was supplied for float chamber balance to the intake (at the same time blanking the passage 3) a complete cure resulted. Each of the above three tests was carried out separately and re-checked. Conclusion. That the present arrangement of passages is such that a reversal of flow can take place. Therefore, from the tests carried out, a separate passage should be incorporated in the casting for the purpose of float chamber balance to the air intake. Hs{Lord Ernest Hives - Chair}/C.T.Salt. | ||