Gas turbine engine thrust reverser

A ducted fan gas turbine engine comprising a core engine having a fan propulsor and a cowling member surrounding and extending downstream of said fan propulsor, said cowling member being radially spaced apart from said core engine so that an annular gap is defined therebetween for the flow of air from said fan propulsor, said cowling member comprising a first static annular portion surrounding said fan propulsor and a second translatable annular portion downstream of said fan which is axially translatable from a first position in which it is contiguous with said first cowling portion and a second position in which a generally circumferential gap is defined between said cowling member portions, a plurality of generally axially extending support members interconnecting said second translatable cowling member portion with said first cowling member portion, a plurality of air flow deflecting members carried by said generally axially extending support members, said air flow deflecting members being translatable along said support members from a first position when said cowling members are contiguous in which said airflow deflecting members are stacked in a nested, axially abutting relationship to a second position when said circumferential gap is defined between said cowling member portions in which said air flow deflecting members are in axially spaced apart relationship and in which they occupy at least a major portion of the axial extent of said circumferential gap between said cowling member portions, and blocker means to at least partially obturate said annular fan air flow duct downstream of said air flow deflecting members when said cowling member portions are axially separated so that at least a portion of the flow of air operationally exhausted from said fan propulsor passes through said generally circumferential gap and is deflected by said air flow deflector means when in said axially spaced apart relationship, said air flow deflector members being so arranged when axially spaced apart to deflect said air flow in generally upstream direction.