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Following these equations from NASA's Glenn Research Center, we obtained the ideal Mach angle for our rocket based on its velocity. For a velocity of Mach 1.7, we approximate the Mach angle (μ) as 36°. Because the sweep angle is the angle between the leading edge of the fin and a line perpendicular to the longitudinal axis of the rocket, these calculations tell us that the sweep angle (ϕ) should be greater than 54° to reduce drag and interference.
