During which period did general aviation aircraft sales reach an all-time high?

The period between 1922 and 1928 was characterized by significant growth in general aviation in the United States. Following World War I, there was a surge in interest in aviation as technology progressed and the war fostered a new wave of innovation in aircraft design. This era saw a large increase in the number of manufacturers and a wider acceptance of flying among the public. The introduction of various types of general aviation aircraft, including light planes, played a crucial role in capturing the interest of private pilots and recreational flyers.

More significantly, the 1920s were marked by the development of infrastructure that supported general aviation, including the establishment of flying clubs, air shows, and the proliferation of air mail routes. This combination of factors led to unprecedented sales and an overall boom in general aviation aircraft. The peak during this specific timeframe is well documented in aviation history, reflecting a unique moment when aviation began its transition from a novel endeavor to a mainstream activity.

In contrast, the other timeframes listed do not reflect the same level of growth or the context of early aviation that characterized the 1920s. Each of those periods had its own developments, yet they did not match the all-time high sales experienced in the late 1920s.