Heritage aircraft are vintage or historically significant airplanes that represent important milestones in aviation history. These aircraft often include models from the early 20th century, military planes from various conflicts, and iconic commercial airliners. They are preserved for educational purposes, showcasing advancements in technology and design over the years. Many heritage aircraft are maintained by museums, aviation enthusiasts, and organizations dedicated to preserving aviation history. Events like airshows and fly-ins often feature these planes, allowing the public to appreciate their craftsmanship and learn about their roles in aviation history. Examples include the Supermarine Spitfire and the Boeing B-17 Flying Fortress.