Ed Yost own interests turned toward reviving the lost practice of manned hot-air ballooning. This technology had first been invented in France by in the late 18th century by pioneers led by the Montgolfier brothers, but under the Montgolfier system, the balloon's air was heated by a ground fire prior to the balloon being released. The inherent danger of this type of balloon flight led to the system being abandoned when hydrogen and later helium became available. One of Yost's key engineering insights was that a hot-air balloon could be made to carry its own fuel. The invention of relatively light burners
Hot air ballooning Lewis. The song "Get It Up" from the 1983 New England release Walking Wild is about hot air ballooning. The song "Let Everything Go" by Phil Keaggy (1981) is about hot air ballooning. In "The Wizard of Oz" (1939), the wizard leaves the Emerald City in a gas balloon, not a hot air balloon. In "Around the World in Eighty Days" a gas balloon, not a hot air balloon, (featured on the movie poster) is used to cross the Pyrenees. In "Enduring Love" (2004), a hot air balloon is involved in a tragic accident during the opening scene. In "The