the aft end of the fan housing being movable to uncover openings in the fan housing for the reversed flow

Full Title

Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto (rocket nozzles F02K9/97) > Nozzles having means for reversing jet thrust (reversing jet thrust using fluid jets F02K1/32) > Reversing fan flow > using thrust reverser flaps or doors mounted on the fan housing > the aft end of the fan housing being movable to uncover openings in the fan housing for the reversed flow