Westinghouse GN4 Avionics Alternator & Transmitter

ca. 1918

This unit was mounted under the wing of the aircraft so that air motion rotated the propeller. Measures 20” long x 6” Diameter at shaft. Propeller (reproduction) measures 28”. Note remains of red National Radio Museum tag. Also known as Signal Corps type SCR73. Signed “Westinghouse Electric & Mfg. Co.” American.