Hey everyone, we’ve uploaded a great new video about assembling the helicopter’s rotors! This is one of the most critical and precise steps in the construction of the entire helicopter. We start with jigging the ribs at the correct orientation, then we tack and glue them in place. The last step is attaching Kevlar tow at the leading and trailing edges of the rotor, to help with drag loads as well as the stresses resulting when we heat-tension the skin.