a French lawyer , physicist, chemist and aeronaut. He met Jean-Francois Pilatre de Rozier in August 1784 and began studying a balloon capable of crossing the English Channel. A simple balloon does not allow a trip so long (it would be impossible to transport all the hay necessary for heating), they develop a combination of balloon and gas balloon , they call "aero-balloon." Roman built the balloon with his brother in Paris under the dome of the Tuileries.
