On this day, 39 years ago, on December 23, 1986 (November 22, 1986 in the lunar calendar), ultra-light aircraft flew around the world without landing. The lightweight "Voyager" contains a flight fuel tank with a capacity of 1500 gallons of gasoline. On December 23, 1986, the experimental aircraft "Voyager", which used only one-time oil filling, landed safely in California. The 25012-mile trip took 9 days, 3 minutes and 44 seconds, setting a record for long-distance flight without refueling halfway and the endurance of two crew members on board. Pilot Richard G. Rutan flew the plane to Edwards Air Force Base. He described the achievement as "the most recent important atmospheric flight." He added: "We are conducting this flight as private citizens. This speaks a lot about American freedom." His co-pilot, Jayana Yego, said: "I was never actually scared. "However, when she rose into the sky, several bruises appeared on her skin and underwent surgical treatment. Seven hours before landing, the most dangerous situation occurred. The rear engine stopped working at that time, but the front engine started, and the danger was saved. The Voyager carried five times its own weight in fuel. It is expected that the flight will lead to more fuel-efficient flights.