Dynamic air intake opening, comprising: - a skin wall separating an exterior space liable to be subjected to a dynamic air stream and an interior space intended to receive a dynamic air intake stream, said skin wall having a dynamic air inlet aperture, - a conduit extending in the interior space from said aperture, said conduit being delimited by a wall, referred to as internal wall, which is fixed with respect to said skin wall and extends in the interior space from said aperture, - at least one flap for opening/closing said aperture, each flap being mounted so as to be able to move with respect to the aperture between a closed position, in which said flap closes off at least part of said aperture, and at least one open position, in which said flap defines a non-zero cross section for the dynamic passage of air in the conduit, said flap having an external face oriented towards the exterior space in the closed position, and an internal face oriented towards the interior space and towards the inside of the conduit, - each flap being mounted so as to be able to move with respect to the aperture via at least one first connecting rod (30, 32) to which it is articulated about a first pivot pin, and at least one second connecting rod (31, 33) to which it is articulated about a second pivot pin, the first and second pivot pins (36, 38) being separate and mutually parallel, - each flap, said connecting rods (30, 31, 32, 33), the pivot pins (36, 38), said conduit and the aperture being shaped and arranged such that, in any open position, a non-zero distance, referred to as exterior spacing, separates the external face of each flap from said internal wall of the conduit, each flap not being in contact with said internal wall of the conduit in any open position, characterized in that: - the kinematics of the flap are designed to allow, in any open position, a non-zero dynamic air stream to flow along the external face of each flap in the conduit and a non-zero dynamic air stream to flow along the internal face of each flap in the conduit. - a skin wall separating an exterior space liable to be subjected to a dynamic air stream and an interior space intended to receive a dynamic air intake stream, said skin wall having a dynamic air inlet aperture, - a conduit extending in the interior space from said aperture, said conduit being delimited by a wall, referred to as internal wall, which is fixed with respect to said skin wall and extends in the interior space from said aperture, - at least one flap for opening/closing said aperture, each flap being mounted so as to be able to move with respect to the aperture between a closed position, in which said flap closes off at least part of said aperture, and at least one open position, in which said flap defines a non-zero cross section for the dynamic passage of air in the conduit, said flap having an external face oriented towards the exterior space in the closed position, and an internal face oriented towards the interior space and towards the inside of the conduit, - each flap being mounted so as to be able to move with respect to the aperture via at least one first connecting rod (30, 32) to which it is articulated about a first pivot pin, and at least one second connecting rod (31, 33) to which it is articulated about a second pivot pin, the first and second pivot pins (36, 38) being separate and mutually parallel, - each flap, said connecting rods (30, 31, 32, 33), the pivot pins (36, 38), said conduit and the aperture being shaped and arranged such that, in any open position, a non-zero distance, referred to as exterior spacing, separates the external face of each flap from said internal wall of the conduit, each flap not being in contact with said internal wall of the conduit in any open position, characterized in that: - the kinematics of the flap are designed to allow, in any open position, a non-zero dynamic air stream to flow along the external face of each flap in the conduit and a non-zero dynamic air stream to flow along the internal face of each flap in the conduit.