A man and a model of airplane in GALCIT wind tunnel, California, United States. The model plane is suspended in wind tunnel powered by a large four-bladed fan. Several airplane models are seen in the wind tunnel. A technician adjusts a balance, amid measuring devices outside the wind tunnel, during operation. Models of sea planes lie on a table. Man carries a pontoon model.
U.S. Army Air Forces Boeing P-12s in flight in California. The planes fly in formation. 18 P-12s fly in a formation over the clouds.
U.S. Army Air Corps Martin B-10 bombers B-10 planes parked on an airfield in California. Several ground crewmen carry 300 lb bombs under a B-10. Two other B-10s parked in the background. Fuse is placed in the nose of a 300lb bomb. Armament men install bombs in the bomb bay of a B-10. The bomb bay doors close. B-10s in flight. An outline of a ship marked in a desert as a target. Five officers at an observation post on the ground. The release and the descent of the 300 lb bombs. Several bombs explode on the target in the desert. A pilot at the controls of a B-10. Bombs explode on the targets. Smoke from the bombardment.
A power plant at Boulder Dam and pictorial depictions of water supplies from Parker Dam and Imperial Dam serving California. The two wings of Boulder Dam power plant, one along each side of the Black Canyon wall. The power plant with different units for generating power. The machinery inside the plant. The major transmission lines that carry power to Los Angeles California metropolitan areas. Two men in the plant near transmission lines. A map depicts the path of power transmission lines. The power plant with turbines. The transmission lines along a desert. A path in the desert. A map depiction of water supply from Parker Dam to the city of Los Angeles. A map depiction of water supply to the Imperial Valley from Imperial Dam. The whole of the Boulder Dam (later Hoover Dam) in view with water gushing through the gates.
A new crash proof automobile in the United States. The designer stands near the crash proof car. The engine in the rear of the car. The bug like car sits five in the front and drives through busy streets. It looks like a bug or insect on wheels.