Welcome to Xiao Qu Coaxial Helicopter, a video channel where I share my passion for building and flying homemade coaxial helicopters. Coaxial helicopters are helicopters that have two rotors mounted on the same axis, one above the other. They are more stable and efficient than conventional helicopters, but less maneuverable. In this channel, you will see how I design, construct and test my own coaxial helicopters, and learn more about the principles and challenges of this fascinating technology. If you are interested in coaxial helicopters or DIY projects, please subscribe and follow me on this exciting journey.