Sky Racers
In the 1920s and '30s, fliers would race their home-built and "suicidally overpowered" single engine aircraft—sometimes in front of 60,000 spectators. The Granville Brothers' Gee Bee Model Z was little more than a massive motor with stubby little wings attached, but it paved the way for the fast fighters the Air Corps put aloft in WWII.