The carburetor test plant  was desgined for convenient, speedy, and accurate observations of carburetor performance, without inclusion of the complications attendant upon engine performance in such testing. It was comprised of an orifice air meter, supplying air to a miniature altitude chamber, in which the carburetor was mounted. Air was drawn through the carburetor by a vacuum pump, and flow pulsations in the air stream were sumilated by an appatatus controlling both rate and amplitude of the pulsations. Pressure within the carburetor chamber could be lowered from that of the atmosphere at approximately one quarter of an atmosphere, and the air temperature could be raised to any desired value above that of the atmosphere.
National Institute of Standards and Technology
National Institute of Standards and Technology