A few comments.
Firstly, all praise to the Wrights for their ingenuity and perseverence. But as has been said, someone else would surely have done it, not too long later. In fact, there is some evidence that others did the same at around the same time.
Leonardo DaVinci was responsible for the design of the first 'viable' flying machine, even though nothing came of it. His dreams and visions could well have been responsible for the first serious efforts in gliding etc which was well before 'powered flight'.
As for pwered flight, it is the jet engine that has opened the horizons of aviation to the point where it can conquer distances that weren't dreamt of 100 years ago. Also the jet engine has made aviation available to the masses as far as viable long range travel is concerned. Also there is the 'quick response' capability of the military due to the jet engine.
For all these reasons, I MUST say the inventor of the jet engine.
P.S. Chuck Yaeger did break the sound barrier first 'in level flight' but it was broken (on two occasions) in an F86 by a fellow named Walsh or Welsh in a dive a couple of months before Yaeger.
So the statement that he first broke the barrier is not technically correct. I beleive the history books and official records now include the qualifying phrase 'in level flight'.
That's all from me...........for now. ;D
