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).
Letter from Bendix to Zenith discussing carburetter components like throttle shafts, pump nozzles, and electric choke units.
Identifier | ExFiles\Box 20\9\ Scan063 | |
Date | 23th December 1935 | |
COPY. X1033 BENDIX PRODUCTS CORPORATION, SOUTH BEND, INDIANA. DECEMBER 23, 1935. Zenith Carburetter Co.Lt., London. Attention: Mr. C.H.Fisher. Gentlemen: Referring to your letter of December 4th in regard to the use of stainless steel throttle shafts in conjunction with phosphor-bronze bushings, wish to advise that we use this combination on truck carburetters where there is considerable vibration and dirt which would have a tendency to wear the shafts. However, on none of our passenger cars do we use this set-up, as we have found that the brass stem with the cast iron bearing is quite satisfactory. On the EE-3 Packard with the extra long accelerating pump nozzles, wish to advise that this was necessary in order to get wide open throttle distribution. On our latest jobs we find that by putting the pump tubes into the small venturi such as on the EE-1 Ford and EE-1 Buick that we can obtain a very satisfactory distribution. Referring to the electric choke unit used on the 1936 La{L. A. Archer} Salle, wish to advise that this is the same as was used on the 1935 La{L. A. Archer} Salle and we have had very satisfactory results. The hand control is only used in the event that the engine is flooded out on the start and in order to unload the choke valve, the hand control is pushed in, opening the choke valve, thus making it possible to start the engine. This same thing can be accomplished by putting a loose lever on the choke stem on the opposite side of the thermostat and connecting this loose lever to the throttle shaft so that in opening up the throttle wide, the choke valve will be opened 30 degrees in the last 15 degrees or 20 degrees of the throttle opening. In order to use this electric unit, it will be necessary to have voltage regulators so that the maximum variation is 2 volts. The distance between the heating unit and the thermostat is very important as it will vary the heat transfer to the thermostat. However, care must be taken to see that it does not strike the thermostat as a short will occur in the resistance unit and will invariably burn out. The current discharge is .8 | ||