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).
Test report on a 20/25 carburetter, detailing the effects of blanking the throttle edge and main jet supplies.
| Identifier | ExFiles\Box 102\1\ scan0240 | |
| Date | 3rd January 1935 | |
| X5080 To E.{Mr Elliott - Chief Engineer} from Hs{Lord Ernest Hives - Chair}/CTS.{C. Trot Salt - Carburation} Hs{Lord Ernest Hives - Chair}/CTS.{C. Trot Salt - Carburation}14/KW.S.1.35. 20/25 Carburetter (EX.15729). With further reference to our report Hs{Lord Ernest Hives - Chair}/CTS.{C. Trot Salt - Carburation}2/KW.27.12.34. The changeover from the throttle edge to the main jet, as stated, takes place at approx. 400 r.p.m. running light. A test has been carried out as follows, which proves that although the throttle action has been reversed, effect from the throttle edge supply is still evident, well past the "changeover" position. (1) Throttle Edge Supply Blanked. Result:- Running light, mixture weak from 1000 r.p.m. downwards, until too weak to run below 500 r.p.m., i.e., engine stops. (2) Main Jet Supply Blanked. Result:- Engine will start, and run for approx. 20 revs., and then stop, mixture being too weak to keep engine running. These tests were carried out with the carb. complete, and the individual jet settings in each case as set for the complete working carburetter. Hs{Lord Ernest Hives - Chair}/C.T. Salt. | ||