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The NASA Periodic Wave Disc Brake Rotor is novel yet elegantly simple and cost-effective design to maximize weight reduction and heat dissipations. This is accomplished through NASA's proprietary concept of combining the forced convection, radiation, and conduction of air flow over the brake rotor's surface. Depending upon the application, a dramatic reduction of the rotor material itself can be selected from either steel, oxygen-diffused titanium, or an aluminum forging alloy. A two-piece floating rotor assembly is designed to further reduce the weight of the rotor's mounting hub and its rotational moment of inertia, while simultaneously minimizing the rotor's thermal expansion, stress, warping, or distortion experience during extreme frictional heating generated from repeated hard braking actions under high speed racing conditions.