A helicopter , comprising: - a fuselage ; - a main rotor coupled to the fuselage and that in operation rotates in a first rotational direction with respect to the fuselage ; - an engine carried by the fuselage and drivingly coupled to rotate the main rotor in the first rotational direction with respect to the fuselage ; - a tail boom that extends rearwardly of the fuselage , the tail boom having an approaching side and a retreating side , the approaching side being a side of the tail boom that the main rotor approaches when rotating in the first rotational direction, the retreating side being a side of the tail boom that the main rotor retreats from when rotating in the first rotational direction, the retreating side opposite the approaching side across a width of the tail boom , the approaching side of the tail boom having a constant radius of curvature about a centerline, and the tail boom having an upper half, a lower a half and a horizontal plane that extends between the upper half and the lower half of the tail boom ; - a first strake that extends outwardly from the approaching side of the tail boom , the first strake positioned below the horizontal plane of the tail boom at an angle of from approximately 5 degrees to 15 degrees, the angle measured between the horizontal plane, the centerline and an axis that extends from the centerline to the first strake ; and - at least one vortex generator that extends outwardly from the retreating side of the tail boom , the at least one vortex generator positioned below the horizontal plane of the tail boom at an angle of from approximately 5 degrees to 15 degrees, the angle measured between the horizontal plane, the centerline and an axis that extends from the centerline to the at least one vortex generator . - a fuselage ; - a main rotor coupled to the fuselage and that in operation rotates in a first rotational direction with respect to the fuselage ; - an engine carried by the fuselage and drivingly coupled to rotate the main rotor in the first rotational direction with respect to the fuselage ; - a tail boom that extends rearwardly of the fuselage , the tail boom having an approaching side and a retreating side , the approaching side being a side of the tail boom that the main rotor approaches when rotating in the first rotational direction, the retreating side being a side of the tail boom that the main rotor retreats from when rotating in the first rotational direction, the retreating side opposite the approaching side across a width of the tail boom , the approaching side of the tail boom having a constant radius of curvature about a centerline, and the tail boom having an upper half, a lower a half and a horizontal plane that extends between the upper half and the lower half of the tail boom ; - a first strake that extends outwardly from the approaching side of the tail boom , the first strake positioned below the horizontal plane of the tail boom at an angle of from approximately 5 degrees to 15 degrees, the angle measured between the horizontal plane, the centerline and an axis that extends from the centerline to the first strake ; and - at least one vortex generator that extends outwardly from the retreating side of the tail boom , the at least one vortex generator positioned below the horizontal plane of the tail boom at an angle of from approximately 5 degrees to 15 degrees, the angle measured between the horizontal plane, the centerline and an axis that extends from the centerline to the at least one vortex generator . <EOS>