As the blue-and-white, half-scale J3 Cub moved to lift off the ground with Pete Rosas at the controls, his wife, Sandy, quickly folded her hands and closed her eyes. "I think it's a go," she said.

The Mid-Missouri Radio Control Association (MMRCA) promotes building and flying radio-controlled airplanes and STEM education. MMRCA works with youth organizations and aims to establish an aviation ...