NEITHER severe military maneuvers, such as power dives and inverted flight, nor icing conditions will affect appreciably the operation of the aircraft carburetor described in his paper, Mr. Kittler asserts. To back his claim, he points to over 1½ years experience with several hundred of these carburetors since the start of their development in 1935.
After a discussion of the problems of icing, maneuverability, and metering, the author details the construction and operation of the type of carburetor finally developed. This carburetor is unlike commonly known types, he explains, in that the fuel level is controlled by a double-diaphragm mechanism instead of by the conventional float mechanism. In place of the fixed venturi and butterfly throttle construction is a variable-venturi mechanism which forms both the throttles and the venturi. Metering is governed, Mr. Kittler continues, by a tapered needle valve actuated by a cam linked to the venturi throttles so that both the air and fuel passages of the carburetor expand simultaneously as the venturi throttles are opened.