What was the estimated height reached during the unmanned flight conducted in Annonay on June 4, 1783?

Answer

6,000 to 10,000 feet

The unmanned balloon flown in Annonay ascended to an estimated height between 6,000 and 10,000 feet before landing.

What was the estimated height reached during the unmanned flight conducted in Annonay on June 4, 1783?
inventionaviationflightballoonMontgolfier brother