"Increase moment of inertia to reduce costly instability MVP Disc Sports engineers Brad and Chad explain that the characteristic turn-and-fade of a flying disc represents wasted energy: "if you're spending all that time in the air, turning and fading, all that drag during that long path is shortening your potential distance." Their solution is to increase the disc's moment of inertia by concentrating mass at the outer rim, which "pulls out that S curve" and also makes the flight "more predictable and consistent." The broader principle — that distributing mass or resources toward the periphery of a rotating system increases stability and efficiency — applies in mechanical design, organizational structure, and anywhere rotational dynamics matter. Source: Brad and Chad (MVP Disc Sports), Smarter Every Day, Why Does a Disc Golf Disc Curve?"