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Corsair Information | Airframe | Tail Group

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Alighting Group
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Tail Group
Structural Repair Manual Illustrations

Tail Group Description

Stabilizers, Fins and Structural Fairings | Elevator and Rudder

The tail group, which is of conventional design, is made up of horizontal stabilizers, vertical fin, elevators, and rudder.  It embodies full cantilever construction, that is necessitation no external bracing whatsoever.  Fixed members of the tail group are made entirely of metal; the movable surfaces have aluminum alloy skeletons covered with doped fabric.  All movable surfaces incorporate aerodynamic balances in their leading edges and are provided with the usual trim tabs, controlled by the pilot.  In addition, the elevators are equipped with small automatic balance tabs.

Stabilizers, Fin and Structural Fairings - Tail Group

The stabilizers are of stressed skin construction.  They consist of a beam, ribs, stringers, and skin plating.  Right hand and left hand stabilizers are identical and may be interchanged.  They connect to the fuselage by means of a fitting on the bulkhead.  Extrusions and 24ST alclad sheet are used throughout for construction. (Fig 80) (Fig 81)

The fin is of full cantilever construction with a stressed skin, a beam, and an internal skeleton of ribs and stringers similar to those in the stabilizers.  The fin attaches to fittings on fuselage bulkhead by means of AN standard bolts.  Flanged inspection holes are located in the skin to provide access to the interior.

The fin and stabilizer fairings are structural members since they carry a part of the primary fin and stabilizer loads.  They are constructed of skin, stiffeners and a former rib and fit inside the root rib of the stabilizer or fin. Rivets attach the fairings to the fuselage.

Elevator and Rudder Description - Tail Group

(Fig 79) (Fig 92)  The elevator structure consists of a beam, "D"-shaped alclad leading edge skin, channel-type ribs, and pre-formed trailing edge.  The entire assembly , including the leading edge, is fabric-covered.  The elevator incorporates a trim tab and a balance tab, each consisting of a channel-shape beam, end ribs, metal skin and an extruded trailing edge.  The entire assembly including the leading edge, is fabric-covered. The elevator incorporates a trim tab and a balance tab, each consisting of a channel-shaped beam, end ribs, metal skin and an extruded trailing edge. The left and right hand assemblies of the elevators are structurally identical and may be interchanged.  

The rudder is of the same general construction as the elevators, incorporating channel-type ribs, a beam with extruded angle flanges and a formed trailing edge. The nose is covered with alclad sheet, and the entire structure is covered with fabric.

Metal SkinThe nose sections of the elevators and rudder are covered with metal skin.  The trim and balance tabs on the elevators and the trim tab on the rudder also have metal skin.  The skin of the elevators, rudder and control tabs is attached to the underlying structure by means of spotwelds and rivets.  (Fig 92)

Fabric SkinThe elevator and rudder are entirely covered with fabric. 

Ribs(Fig 92)  The ribs in the elevators and rudder are constructed of 24ST alclad sheet.  The edges of the ribs are flanged to form channel sections.  A bead and a flanged lightening hole stiffen the web of each rib.  Riveted to the contour of the ribs are fabric attachment hooks which are stabilized by bent up angle sections.

The ribs are in two sections, leading edge and trailing edge.  At certain stations the leading edge ribs are attached to the trailing edge ribs through flanged holes in the beam web and are then attached to the beam by means of attaching angles and gussets.  The remainder of the leading edge ribs are wither fastened directly to the beam web by means of attach angles or attach to the skin only.

Diagonal Brace TubesDiagonal bracings made of inch O.D. X .033 inch 24ST alclad tubes are used both in the elevators and in the rudder.  The ends of these tubes are flattened to form an attachment fitting, one at the trailing edge and the other at the web of either the rib or the beam. 

BeamsThe beam of the elevator consists of extruded angle flanges and an alclad sheet web.  Flanged holes in the beam web permit the attachment of leading edge ribs to trailing edge ribs.  The rudder beam is similarly constructed and rudder ribs attach as do those of the elevator.  (Fig 96)   Attached to the beam of the elevator are three channels. To each of which is bolted a block fitting.  The elevator is hinged to the stabilizer by the attachment of three blocks to the stabilizer hinge brackets.  Attached to the beam of the rudder in like manner is a similar block providing attachment for the hinge bracket on the fin main beam.

Torque TubesThe torque tube is a 1 5/8 inch O.D. X .125 inch aluminum alloy tube.  It carries the elevator torque loads from the inboard end of the nose section to the elevator control horn.  The tube is connected to the elevator nose section by means of forged sockets which are riveted to two ribs. 

The rudder torque tube is connected to the rudder nose section in the same manner, and carries not only torque, but also part of the drag loads for the rudder.  (Fig 98)

Trailing Edge StripThe trailing edge strips of the rudder and elevators consist of formed elliptical tubes fabricated from 24ST aluminum alloy.  (Fig 92)  A pre-formed channel section of 24ST alclad sheet acts as a tab hinge support both on the elevators and on the rudder. 

Tabs:  The tabs in the tail group consist of the elevator and rudder trim tabs and the elevator balance tabs.  (Fig 79)  The elevator trim tab and the balance tab are located at the inboard trailing edge, and are constructed of 24ST alclad former ribs attached to a light beam at the leading edge.  Upper and lower skins of 24ST alclad sheet are spotwelded together at the trailing edge and to the beam at the leading edge.  The elevator balance tab is smaller than the trim tab and has only one reinforcing rib between the end ribs.  The rudder trim tab is similar to the elevator trim tab, and is located at the lower trailing edge of the rudder.  Hinge fittings attach the tabs to the channel-shaped trailing edges of the elevators and rudder.

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Last modified: September 18, 2012

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