aahs_p002039 - A black and white photo of the inside of a plane

The X-planes are a series of experimental United States aircraft and rockets, used to test and evaluate new technologies and aerodynamic concepts. They have an X designator, which indicates the research mission within the US system of aircraft designations. The first, the Bell X-1, became well known in 1947 after it became the first aircraft to break the sound barrier in level flight. Most of the X-planes have been operated by the National Advisory Committee for Aeronautics (NACA) or, later, the National Aeronautics and Space Administration (NASA), often in conjunction with the United States Air Force. The majority of X-plane testing has occurred at Edwards Air Force Base. Some of the X-planes have been well publicized, while others have been developed in secrecy. Most X-planes are not expected to go into full-scale production.

The Album features American Aviation Historical Society photographs of pre- and post- WWII airplanes.

World War II was a period of rapid technological advancement in the field of aircraft, and these advancements have continued to shape the development of aircraft in the years since. There were significant advances in aircraft design, such as the use of swept wings and the development of more advanced aircraft materials, such as aluminum alloys and plastic composites. These advances allowed for the construction of stronger, lighter aircraft that was capable of higher speeds and greater maneuverability. Biplanes, which have two main wings stacked one above the other, were largely obsolete by the time World War II began in 1939. They had been largely replaced by monoplanes, which have a single main wing, by the start of World War II. The main advantage of monoplanes is that they are typically faster and more maneuverable than biplanes due to their streamlined design. In addition, monoplanes are able to carry a greater load for their size, making them more suitable for use as bombers and transport aircraft. However, biplanes were not completely abandoned during World War II. Some biplane designs, such as the British Hawker Hurricane and the Soviet Polikarpov I-153, saw limited use as fighters. In addition, biplanes were used in a number of other roles, including training, observation, and light transports. One of the major developments in aircraft technology during World War II was the use of jet engines, which allowed for faster and more powerful aircraft. The first jet aircraft, the German Heinkel He 178, made its first flight in 1939. However, it was not until after the war that jet aircraft became widespread. During World War II, a number of aircraft were produced in large quantities to meet the demands of the war. Here are some examples of some of the most massively produced aircraft of World War II: The Soviet Union's Ilyushin Il-2 was a ground attack aircraft that was produced in tremendous numbers, with more than 36,000 being built. It was heavily armed and armored, making it a formidable opponent on the battlefield. The German Messerschmitt Bf 109 was a mainstay of the German air force and was produced in large numbers, with more than 35,000 being built. It was used as a fighter, interceptor, and ground attack aircraft, and saw action on many fronts during the war. The American Republic P-47 Thunderbolt was a heavily armed and armored fighter that was produced in large quantities, with more than 15,000 being built. It was used extensively in Europe and the Pacific and was known for its durability and long range. The British Supermarine Spitfire was a highly regarded fighter that was produced in large numbers, with more than 20,000 being built. It saw action in many theaters of the war and was known for its agility and handling.

• 25 Best 1937 Bell YFM-1 Airacuda images | Warbirds, Fighter jets ...
• Forums / USAAF / USN Library / Bell YFM-1 Airacuda - Axis and ...
• Airacuda Blower - Warbird Information Exchange • View topic
• YFM-1-looking-forward.jpg Photo by Duggy009 | Photobucket