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).
The performance and issues of an aluminium carburetter for a Phantom engine.
| Identifier | ExFiles\Box 66a\1\ scan0223 | |
| Date | 1st July 1926 | |
| To BY.{R.W. Bailey - Chief Engineer} from Hs.{Lord Ernest Hives - Chair} To E.{Mr Elliott - Chief Engineer} 48081 Hs{Lord Ernest Hives - Chair}3/LG6. 7. 26. 48080 48081 ALUMINIUM CARBURETTER FOR PHANTOM ENGINE. General experience and tests with an aluminium carburetter made on the same lines as the standard brass carburetter, indicate that the following points should have attention. FLOAT CHAMBER COVER. With the present clearances this seizes. With suitable clearance and thread there seems no reason why this should not be satisfactory; Zenith and Claudel use them. We anticipate the lock will be used on this carb. THROTTLE AND THROTTLE SPINDLE BEARING. The throttle, when shut in the aluminium body, if hot, tends to stick due to contraction of body. Greater inclination of throttle or material similar to body would probably rectify this. Bushes for spindle should be employed. We are testing a duralumin butterfly valve. HIGH SPEED JET ADJUSTING NUT. This is of brass and bears, under the action of the spring, on the aluminium lug at the top of the spray chamber. A hard bush should be used here as the aluminium wears and tends to upset adjustment. HIGH AND LOW SPEED CHOKE TUBES. There seems no reason why these could not be made in aluminium, as brass ones add considerably to the weight - a total of 1 1/4 lbs. contd :- | ||