Thrust reversing apparatus

Abstract

Abstract FRONT FAN JET ENGINE HAS COWL SURROUNDING ENGINE AND TERMINATING IN JET EXHAUST NOZZLE. ELONGATE STREAMLINED SHROUD WITH INNER AND OUTER WALLS SURROUNDS COWL AND IS SPACED RADIALLY THEREFROM TO DEFINE ANNULAR FAN AIR DUCT BETWEEN COWL AND SHROUD. REVERSER INCLUDES OUTFLOW PASSAGE MEANS COMPRISING CIRCUMFERENTIALLY ARRANGED SETS OF OPENINGS IN INNER AND OUTER WALLS OF AFT PORTION OF SHROUD. A SET OF CONTROL DOORS IS PROVIDED IN EACH SET OF OPENINGS. EACH DOOR SET INCLUDES AN INNER AND AN OUTER DOOR SWINGABLE FROM STOWED POSITION CLOSING OPENINGS IN INNER AND OUTER SHROUD WALL AND CONFORMING TO SHROUD WALLS, TO DEPLOYED, OPEN POSITION DIVERGING FORWARD FROM LONGITUDINAL AXIS OF SHROUD WITH FORWARD ENDS EXTENDING INTO FREE STREAM AIR, AND AFT ENDS OF OUTER DOORS IN BLOCKING CONTACT WITH ENGINE COWL AND EACH OTHER, THEREBY BLOCKING REARWARD FLOW OF FAN AIR AND REDIRECTING IT OUTWARD AND FORWARD THROUGH PASSAGE MEANS TO PRODUCE REVERSE THRUST. FORWARD ENDS OF DOORS OF EACH SET APPROACH EACH OTHER DURING DEPLOYMENT TO PROVIDE THINNER OVERALL LEADING EDGE AND INCREASE EFFECTIVE ANGLE OF DIVERGENCE. SPOILER ACROSS LEADING EDGE OF OUTER DOOR OPENING SWINGS OPEN TO PREVENT REINGESTION OF REVERSER GASES.

Inventors

• 👤 Richard L Maison
• 👤 George E Medawar

Bibliographic Details