The Pathfinder, which initially faced challenges, experienced a breakthrough when it became a part of NASA. Its purpose was to demonstrate the feasibility of utilizing solar power to propel lightweight and delicate aircraft to fly at high altitudes and land safely. Numerous test flights were carried out in Hawaii. In 1995, the Pathfinder accomplished its first altitude record during a 12-hour flight, making history as the first solar-powered aircraft to successfully fly at 50,000 feet. Less than two years later, it surpassed that achievement, reaching an astounding 71,530 feet. This marked the highest recorded flight not only for a solar-powered aircraft but also for a propeller-driven one.

In 1998, the aircraft underwent modifications and was named Pathfinder-Plus after gaining a longer wingspan. This enhancement enabled it to break its own record and soar to an altitude of 80,201 feet. The Pathfinder-Plus utilized solar cells as its power source instead of liquid fuel, contributing to its remarkable altitude accomplishment. Additionally, its unique design played a significant role in its ability to set a new record.