When did the first powered airplane fly?

Powered flight really started with William Henson and John Stringfellow using Cayley's principles, these two
Englishmen designed an aerial steam carriage in 1842. Many of their ideas were practical, but they, too, were ahead of their time — there was no adequate engine.
In 1848, Stringfellow, working alone, built a model 10 feet long with a batlike wing. It had an engine which weighed less than 9 pounds and powered two propellers. It made short, sustained flights, flying as much as 40 yards. It was only a model, but it was real, pow¬ered flight.

John Stringfellow and William Henson design