Bartolomeu de Gusmão

Bartolomeu Lourenco de Gusmao (1685 to 1724) was a Portuguese Catholic priest and naturalist, born in colonial Brazil, who is regarded as an early pioneer of lighter than air flight. He is credited as among the first scholars of his time to grasp the basic principle behind hot air balloon flight, that heated air rising inside an enclosed envelope could lift a vessel, and to build a working small scale prototype demonstrating the idea, work that predates the celebrated Montgolfier brothers' public balloon demonstrations in France by roughly six decades. His research and demonstrations took place in Lisbon, where he petitioned the Portuguese crown for support of his aeronautical experiments. He is also remembered in Portuguese and Brazilian culture as a central character in Nobel laureate Jose Saramago's novel Baltasar and Blimunda, which fictionalizes his flying machine experiments alongside the building of a monastery. His work stands as one of the earliest documented European attempts to reason systematically about the physics of buoyant flight rather than simple imitation of birds.