United States Army Air Force footage of a helicopter designed by Emile Berliner and Henry Berliner being tested in Washington D.C.,United States. This was one of the final Berliner models built, if not the final, constructed after the triplane model 5 variant that had been demonstrated in February of 1924. This variant had a biplane configuration and was lighter to improve the thrust to weight ratio. The lower wing generated lift from the rotor downwash due to a high angle of incidence and large camber. The helicopter repeatedly lifts off, hovers, does some forward movement, and then touches the ground.
Test flight of a Berliner helicopter by Henry Berliner. A hybrid airplane helicopter built by Emile Berliner and his son Henry Berliner is shown during a Washington DC test flight. It rises and move forward in short hops. The lighter weight design and high incidence large camber lower wing indicates it was likely built in 1924 or 1925 as one of the last Berliner models, following after a triplane version that was test flown in February 1924.
Line of U.S. battleships, including 1917 class (New Mexico class) such as the USS Idaho, USS Mississippi, USS New Mexico. Image of U.S. Capitol in Washington seen. U.S. Navy sailors parading in Washington, DC. Crowd gathered at Washington monument. Sailors on signal bridge of a U.S. warship, hoisting signals. Ships in distance. U.S. Navy sailors, aboard a destroyer, launching depth charges which explode and produce upsurge of water, behind the vessel. Sailors hurrying to their battle stations.
General Billy Mitchell accompanied with a group of people, arrives at court in Washington DC, USA. The group poses for the camera. People gathered in queues outside the court. General Michell standing in the court hears the charges against him. The trial continues. Major General Summerall with his elbow on his head listens to the charge of animosity on him. The Generals leave after the trial and pose outside the court.
American boy scouts organize fire prevention parade in Washington DC. View of the Capitol building. Boy scouts parade on street of Washington DC. They carry United States flag and banners. Banners read, 'I Was Careless With My Camp Fire', 'Don't Take Any Chance With Fire', 'Our Forests Give Health Prosperity Recreation, Don't Burn Them', 'Our Forest Protect Game Prevent Floods Equalize Climate Protect Them'. Navy band leads the marchers. United States President John Calvin Coolidge Jr reviews the parade. View of Washington monument. Secretary of Agriculture Henry C Wallace and National leader of American Boy Scouts address people.
Practice maneuvers of United States Army Air Service 1st Provisional Air Brigade commanded by Brigadier General James Fechet in the United States. The brigade from Langley Field, flying over Alexandria, prepares a mock attack targeted at the United States capital city of Washington DC. U.S. Army Air Service Airco DH4 aircraft in flight. The mock attackers reach the Lincoln Memorial in spite of the heavy rain. Rows of Navy buildings near the memorial. The DH4 aircraft above the area. The attack group in formations over Washington DC. Views of the Potomac River Bridges including the Aqueduct Bridge near newly built Key Bridge. The pursuit group attacks the enemy fleet from above and below at the same time.