when did they develop the first motor- generated flying machine?
December 14, 1782
Wright brothers
Because December 13, 1903, was a Sunday, the brothers did not make any attempts that day, even though the weather was good, so their first powered test flight happened on the 121st anniversary of the first hot air balloon test flight that the Montgolfier brothers had done, on December 14, 1782
what kind of business did the wright brothers own before their flight They opened a bicycle repair and sales shop. what are they known for? They were two American aviation pioneers generally credited with inventing, building, and flying the world's first successful motor-operated airplane.
wiki:5418108
Wright brothers [SEP] First powered flight
In camp at Kill Devil Hills, they endured weeks of delays caused by broken propeller shafts during engine tests. After the shafts were replaced (requiring two trips back to Dayton), Wilbur won a coin toss and made a three-second flight attempt on December 14, 1903, stalling after takeoff and causing minor damage to the "Flyer". Because December 13, 1903, was a Sunday, the brothers did not make any attempts that day, even though the weather was good, so their first powered test flight happened on the 121st anniversary of the first hot air balloon test flight that the Montgolfier brothers had done, on December 14, 1782.