Articles with tag: "carburetors"

(Note: figures do not appear in the summaries below)

  1. Carburetor and Induction Systems

    "A demon was operating the throttle." S. W. Sparrow, 1920. 1

    Figure 3. Schematic diagram of throttle and throttle barrel showing air-flow patterns and throttling ice. A butterfly valve plate angled to allow some airflow past it. Ice is forming on the edges of the valve plate, as well as on the throttle barrel walls downstream of the valve plate, partially obstructing the airflow.
    From NACA-TR-982.

    Summary

    Carburetor icing has been a known hazard for over 100 years, and many protection strategies were studied in the NACA-era.

    Key Points

    1. Carburetor icing has been a known hazard for over 100 years.
    2. Part of the hazard can occur in clear air (throttling icing and fuel-evaporation icing).
    3. "The NACA induction-system icing program at the National Bureau of Standards was initiated in January 1941. The project is financed jointly by the Army, the Navy, and the National Advisory Committee for Aeronautics."
    4. Numerous tests and studies were conducted in the NACA-era.
    5. Many aircraft today have carburetor protection similar to that developed in the NACA-era.

    Discussion

    The spark ignition, Otto cycle engines commonly used on airplanes in the NACA-era typically had carburetors to control the air and fuel entering the cylinders for combustion. These could be affect by ice …

    read more