
Construction of the Fan Drive Enclosure of the 40×80 Foot Wind Tunnel at Ames.
Concrete frame enclosing the fan drive bents of the 40x80 foot wind tunnel at ames. Once installed, six 40-foot-diameter fans, each powered by a 6000-horsepower electric motor maintained airflow at 230 mph or less (these are still tornado velocities).
Image Credit: NACA
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https://www.nasa.gov/image-detail/amf-aal-4479/
TakenAugust 26, 1943
ProducerARC
Image CreditNACA
Size1616x1920px
PIA NumberAAL-4479