The document describes an experiment to test how different paper airplane designs affect flight speed. Three designs - Harrier, Martin, and Galaxy Fighter - were tested by measuring the time and distance of each plane's flight over three trials. The Martin design traveled the farthest distance and fastest speed on average, while the Galaxy Fighter design was the slowest. The experiment had one independent variable (paper airplane design), one dependent variable (flight speed), and controlled for paper type, weather conditions, and launch force.