If you live in Germany, the Wright brothers may have "invented" the airplane, but Hans Grade was the person who made the airplane practically usable: :-)
> and before, Otto Lilienthal invented the glider, i.e. he made the idea of heavier-than-air aircraft a reality
The Wright brothers were very aware of Lilienthal and his contributions.
Wilbur Wright, speaking to the Society of Western Engineers in Chicago, September 1901:
> The difficulties which obstruct the pathway to success in flying-machine construction are of three general classes: (1) Those which relate to the construction of the sustaining wings; (2) those which relate to the generation and application of the power required to drive the machine through the air; (3) those relating to the balancing and steering of the machine after it is actually in flight. Of these difficulties two are already to a certain extent solved.
> This inability to balance and steer still confronts students of the flying problem, although nearly eight years have passed. When this one feature has been worked out, the age of flying machines will have arrived, for all other difficulties are of minor importance.
> Herr Otto Lilienthal seems to have been the first man who really comprehended that balancing was the first instead of the last of the great problems in connection with human flight. He began where others left off, and thus saved the many thousands of dollars that it had theretofore been customary to spend in building and fitting expensive engines to machines which were uncontrollable when tried. He built a pair of wings of a size suitable to sustain his own weight, and made use of gravity as his motor.
> Lilienthal not only thought, but acted; and in so doing probably made the greatest contribution to the solution of the flying problem that has ever been made by any one man. He demonstrated the feasibility of actual practice in the air, without which success is impossible. Herr Lilienthal was followed by Mr. Pilcher, a young English engineer, and by Mr. Chanute, a distinguished member of the society I now address. A few others have built gliding machines, but nearly all that is of real value is due to the experiments conducted under the direction of the three men just mentioned.
> We figured that Lilienthal in five years of time had spent only about five hours in actual gliding through the air. The wonder was not that he had done so little, but that he had accomplished so much. It would not be considered at all safe for a bicycle rider to attempt to ride through a crowded city street after only five hours’ practice, spread out; in bits of ten seconds each over a period of five years; yet Lilienthal with this brief practice was remarkably successful in meeting the fluctuations and eddies of wind gusts.
The Wright brothers found that Lilienthal’s method of controlling an airplane was never going to work, and devised something that would. That was their invention. Nothing more, nothing less.
My parents used to take me to Stanford Hall occasionally where there was an exhibit about Percy Pilcher, I suppose it was free to get in. I always found looking up at the waxwork's face slightly disturbing: https://stanfordhall.co.uk/family-history/the-percy-pilcher-...
"Vor einem knappen halben Jahr feierte die Technikwelt den 40. Jahrestag der "Mother of all Demos", die am 9. Dezember 1968 die Computermaus an die Öffentlichkeit brachte. Demo-Leiter Douglas Engelbart gilt seitdem als Erfinder des immer noch genialsten und griffigsten Eingabegeräts der Informatik.
Diese Ansicht muss jedoch korrigiert werden, denn schon einige Wochen vorher erschien eine Publikation der Firma Telefunken, die ein Input-Instrument vorstellte, das an Monitoren hing und funktionell der Engelbart-Maus gleichkam: die so genannte Rollkugel. Seit den frühen 70er-Jahren wurde sie zusammen mit Telefunken-Rechnern verkauft und in der Praxis eingesetzt, und mindestens ein Exemplar hat in einem Museum überlebt."
Google Translate:
"Almost half a year ago, the technology world celebrated the 40th anniversary of the "Mother of All Demos," which introduced the computer mouse to the public on December 9, 1968. Since then, the demo's leader, Douglas Engelbart, has been considered the inventor of what is still the most ingenious and handy input device in computer science.
This view, however, must be corrected, because a few weeks earlier, a publication by the Telefunken company appeared, introducing an input device that hung from monitors and was functionally equivalent to the Engelbart mouse: the so-called trackball. Since the early 1970s, it was sold alongside Telefunken computers and used in practice, and at least one example has survived in a museum."
> https://en.wikipedia.org/wiki/Hans_Grade
(and before, Otto Lilienthal invented the glider, i.e. he made the idea of heavier-than-air aircraft a reality:
> https://en.wikipedia.org/wiki/Otto_Lilienthal
)