Which Air Mail Act allowed contractors to be paid 80 percent of air mail revenue?

The Air Mail Act of 1925 is significant because it established a system where private contractors could operate air mail services and receive substantial financial compensation for their efforts. Under this act, contractors were guaranteed to receive up to 80 percent of the revenue generated from air mail routes they operated. This was a substantial incentive that encouraged private companies to enter the air mail industry, leading to a significant expansion and improvement in air mail services during that period.

The act not only promoted the growth of commercial aviation but also improved the efficiency and reliability of mail delivery across the United States. It represented a pivotal moment in the development of air postal services, setting the stage for the future of commercial aviation as well as the transformation of the postal system.