> The Wright Brothers' ENGINE is what made thier airplane a success. <

Oh my, but you really have that quite wrong. Their engine was a minimal affair that just did the job and lost power as it warmed up. The Wright's learned how to fly using gliders, learned how to control an aircraft in three dimensions, corrected the erroneous tables of lift that everyone else had used, figured out that a propellor was a little wing going around in circles and put it all together to work.