Hughes H-4 Hercules flying boat on its maiden flight in California, United States. The Hercules accelerates throwing up a large trailing wake that diminishes as she gains speed and her hull rises approaching liftoff. The H-4 Hercules taxis back after completing the short flight. Her registration number, NX 37602 is clearly visible on her tail.
The Yellowstone National Park in Wyoming, United States. A bear cub climbs down a tree in woods at the park as the mother bear stands under the tree. Another bear cub climbs down the tree.
Examples of early American lumber processing at Sutter's Mill saw mill replica in El Dorado County, California. Water powered saw mill in operation. A water powered vertical reciprocating saw cuts a plank of wood. Except for the saw, brackets, axle, and bearings, all parts of the saw mill are made of wood . Lumber is stacked in a wooden shed. Logs of wood loaded onto wooden carts.
A woman answers a phone call in an office. A man puts equipment in a van with an owl insignia on its door and a sign reads ' Mobile Mechanics' He drives the van along an Interstate Highway in California. Highway signs along the road point the way toward Interstate route 5 and Bakersfield via the Golden State Freeway. Scene of mechanic at the wheel of the repair truck on the Interstate. He arrives to assist the troubled car owner. Mechanic uses an engine system analyzer to diagnose the problem.
A graph shows an ever increasing speed of aircraft year after year. In 1937 speed was 250 Knots and it rises to 600 Knots in 1948. United States F-84 undergoes some tests in a wind tunnel at Wright air Development Center in Ohio, United States. Main control panel inside the wind tunnel. A man wearing headset works on throttles. An engineer checks the main test panel. Engine fire test conducted as flames start to pour through ports.
Wright Air Development Center in Ohio, United States. A sign reads 'Danger only authorized personnel permitted on firing range by order of commanding officers'. At the firing range a technician operates a twin 50 cal machine gun mounted on a table, muzzle protrudes through a hole in a wall. Buttons that start firing pushed by a man. Gun fires rapidly, ammunition goes into the firing chamber of the gun.
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