Bringing history to life literally. Imagine the thrill aka terror of running any engine back then for a wheeled vehicle... And the to say "we're gonna make this FLY!". When everything was experimental, from distillation of oil into fuel, carburettor design, crank forging, cylinders, valves, everything hand crafted... Then add all the aircraft design elements. Not just make it better but making the first EVER. And then getting in the thing and just going, not the first solo in a Cessna but the first human EVER to pull back on the stick and hear the wheels lift off the grass. And seeing your BROTHER doing that (knowing the risk, the unknowns).