Propeller Research Tunnel
This test fuselage (circa 1926) is fitted with Cowl No. 10, the prototype for the first commercial installations. Developed in the PRT to reduce air resistance around a radial engine, the NACA Cowl proved to both lower air resistance and improve engine cooling. It earned the NACA its first Collier Trophy in 1929 and rapidly became a standard appliance for radial engines.
Credit: NASA
Image Number: L-1928-02532
Date: March 19, 1928
Propeller Research Tunnel
This test fuselage (circa 1926) is fitted with Cowl No. 10, the prototype for the first commercial installations. Developed in the PRT to reduce air resistance around a radial engine, the NACA Cowl proved to both lower air resistance and improve engine cooling. It earned the NACA its first Collier Trophy in 1929 and rapidly became a standard appliance for radial engines.
Credit: NASA
Image Number: L-1928-02532
Date: March 19, 1928