Abstract: An assembly comprises a cleat and a pedal. In one embodiment the pedal includes a locking structure and a retaining wall. The locking structure is capable of locking the cleat to the pedal. The retaining wall prevents the cleat from sliding off the pedal when the cleat is not locked in the locking structure. In one embodiment the pedal includes a removable platform and a pedal body. The removable platform includes the locking structure, and this platform is removable from the pedal body when a sufficient force is applied, allowing for a quick disconnection in an emergency.

Abstract: A gas turbine engine blade includes pressure and suction sides extending between leading and trailing edges and root to tip. The pressure side includes a tip rib recessed therein to define a tip shelf terminating in an inclined ramp. The ramp may be aligned with streamlines of combustion gas flow for preventing interruption thereof and the increase of heat transfer therefrom.