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
2016 Lockhart hot air balloon crash pilot's "pattern of poor decision-making" that led him to launch the balloon (on a day when other balloon operators cancelled their planned flights because of low cloud and fog), to continue the flight into fog and above clouds, and then to descend near clouds which made it difficult to see and avoid obstacles. The pilot's medical conditions (depression and ADHD), the prescription drugs he was taking, and the fact that balloon pilots do not need a medical certificate even for commercial flights were contributing factors leading to the accident. On August 1, Heart of Texas Hot Air Balloon Rides, whose