Kids' Science Challenge #7 Question 2. In 1903 the American brothers Orville and Wilbur Wright tested an invention that relied on an understanding of aerodynamics. What invention, using an internal combustion engine, did they test? Answer: An airplane The brothers lived in Idiana, USA. They first designed and built gliders (planes that fly without engine or other power). In 1905 they successfully flew a 24 mile circuit in a the petrol engine plane like the one they tested in 1903. Correct answer received from: Jimmy D., Hamish R., tay, Tara B., Kathy, Eeyore, Joe, Irana M., Dino, Faye N., Matt C., Krissy, Barry L., Nikhil, Amanda M.,