Variable area exhaust nozzle

A variable area exhaust nozzle comprising:

• a fixed nozzle wall,
• a first pivotal half shell having a concave surface and a convex surface positioned in alignment with the fixed wall and hinged around a shaft located on a rotational axis upstream of said half shell and attached to the fixed wall,
• pivoting means for the half shell attached to the fixed wall and adapted to rotate the half shell relative to the fixed wall through a plurality of positions between a stowed position in which the gas exhaust area is at a minimum and a deployed position in which the gas exhaust area is at a maximum,
• a seal installed on the fixed wall and contacting the pivotal half shell,
• a second pivotal half shell having a concave face facing the concave face of the first half shell and hinged at an upstream portion to the fixed wall,
• two fixed beam extending rearward of the fixed wall between the two half shells and comprising overlapping sliding tracks for receiving the side edges of each half shell and
• said sliding tracks including seals contacting the side edges of each pivotal half shell,
• said fixed beams having an internal envelope provided with shoulders at the edges of said beams, so that the lateral edges of each half shell cooperate with said shoulders of the internal envelope and overlap at least a portion of the internal envelope.