Upvote:2
You need to research George Cayley who worked out the principles of modern aircraft in the first decades of the 19th Century, and flew heavier than air gliders by mid century.
But that should not detract from the real achievements of the Wright Brothers in constructing prototypes of practical heavier than air flying machines. Heavier than air flight by the beginning of the 20th Century was in the air (so to speak).