AN EXHAUST NOZZLE FOR A GAS TURBINE ENGINE

There is disclosed an exhaust nozzle 20 for a gas turbine engine 10. The exhaust nozzle 20 comprises a frame 30 extending along a longitudinal axis 50, and a convergent petal 32 pivotably attached at a convergent pivot point 36 to the frame 30 and extending axially downstream and radially inward from the frame 30. The exhaust nozzle 20 comprises a follower roller 42 fixed to the convergent petal 32 on a radially outer side of the convergent petal 32, and a cam 46 defining a working surface 48 configured to engage the follower roller 42 to react a force from the convergent petal 32. The cam 46 is movable along a travel in an axial direction to actuate radial movement of the follower roller 42 to pivot the convergent petal 32. The cam 46 defines a convex working surface 48 such that a contact angle between the follower roller 42 and the cam 46 varies along the travel to thereby vary an axial component of the force reacted by the cam 46.