Aircraft propellers are rotating devices that generate thrust to propel an aircraft through the air. They consist of a hub, which attaches to the engine or gearbox, and two or more blades, which are shaped like airfoils to produce lift and push air backwards. As the blades rotate, they create a pressure difference between the front and back surfaces, which generates a force that propels the aircraft forward. Propellers can be fixed or variable pitch, depending on the design and application of the aircraft. The history of aircraft propellers dates back to the early 1900s, when the Wright Brothers used wooden propellers to power their flying machines. Over the years, propeller technology has evolved to include materials such as aluminum, composite materials, and carbon fiber, which are stronger, lighter, and more durable. Propeller design has also become more sophisticated, with computer modeling and wind tunnel testing used to optimize blade shape, size, and pitch for maximum efficiency and performance. Aircraft propellers are used on a variety of aircraft, including small general aviation planes, commercial airliners, military aircraft, and helicopters. They are favored for their simplicity, reliability, and fuel efficiency, especially in smaller aircraft where jet engines may not be practical or cost-effective. Propeller-driven aircraft are also able to operate from shorter runways and at lower speeds than jet aircraft, making them ideal for regional and remote air transportation.
thrust, lift, airfoils, fixed pitch, variable pitch, materials, design, efficiency, performance, reliability, fuel efficiency, regional air transportation
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