Apparatus to prevent air leakage in turbine engines

An outer duct of a turbine engine, the outer duct comprising:

• a forward core cowl including a hinge;
• a first outer duct section including an airflow inlet;
• a second outer duct section including an airflow outlet, having a closed position and an open position, the outer duct longitudinally movable from the closed position to the open position, the second outer duct section including:
• a slider that is received by a track to facilitate movement of the second outer duct section from the closed position to the open position;
• and
• a brush seal holder and a brush seal including a plurality of bristles having a compressed state in the closed position and a decompressed state in the open position,
• wherein the brush seal is within at least one of the track or the hinge.

A turbofan comprising:

• a core cowl;
• and
• a nacelle having an airflow inlet and an airflow outlet, the nacelle including:
• a forward core cowl including a hinge;
• a first nacelle section including a first perimeter and a first track;
• a second nacelle section, including a second perimeter, having a closed position and an open position, the second nacelle section longitudinally movable from the closed position to the open position along the first track;
• and
• a brush seal runner extending along at least a portion of the first perimeter and at least a portion of the second perimeter, the brush seal runner including a first brush seal including a plurality of bristles having a compressed state in the closed position and a decompressed state in the open position,
• wherein the first brush seal is within at least one of the first track or the hinge.

A turbofan comprising:

• a bifurcation including a first track and a second track;
• and
• an outer casing including an airflow inlet and an airflow outlet, the outer casing adjustable into a closed position and an open position, the outer casing positioned around the bifurcation, the outer casing including a first slider for movement between the closed position and the open position that mates with a first track, the first track including a brush seal holder and a first brush seal including a plurality of bristles having a compressed state in the closed position and a decompressed state in the open position;
• wherein a core cowl is movable via a second slider along the second track of the bifurcation and includes a second brush seal.