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).
Carburetter and choke adjustments for Condor, Eagle, and Falcon aero engines.
| Identifier | ExFiles\Box 42\3\ Scan069 | |
| Date | 31th December 1926 guessed | |
| Contd :- -4- tube is located practically inside one of the float chambers the mixture being taken to the choke by a series of passages terminating in a spray nozzle similar to the original RR. horizontal carburetters. We see no other reason for such an arrangement. The carburetters on our other engines - Condor, Eagle and Falcon, would not be appreciably affected by fore and aft inclination of the 'plane as the diffusers are placed laterally in line with the centre of the float chamber. As it has been decided to reduce the normal speed of the engine to 2100 r.p.m. from 2250 r.p.m. we should be able to use smaller chokes without sacrificing any power over our useful speed range and such a change would be expected to considerably improve the acceleration and general functioning. Consequently we are trying out a number of chokes in order to find the minimum size we can employ and as a first trial using a throat to give the same gas velocity as the Curtiss. Having determined a suitable choke from consider-ation of power, we shall then test for acceleration using a petrol level which will be safe from flooding up to 15° inclin-ation - which is about the highest level we can safely employ. Hs{Lord Ernest Hives - Chair}/A.{Mr Adams} C. Lovesey. | ||