How do you build an autogiro?

Building an autogiro involves several key steps: First, design the airframe to support both the rotor and the propulsion system, ensuring it can withstand aerodynamic forces. Next, construct the rotor system, which includes a rotor hub, blades, and a means for autorotation. Then, integrate the engine and propeller for thrust, along with necessary controls for stability and maneuverability. Finally, conduct thorough ground tests and flight tests to ensure safety and performance before regular operation.