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1. General Discussion. a. Description of Fuselage. - The fuselage is a semimonocoque structure consisting of 24ST aluminum-alloy stressed skin reinforced longitudinally by bulb angle stringers and laterally by traverse bulkhead rings. The skin and all bulkheads are spliced at the horizontal center line. The forward portion of the fuselage which forms the pilot's cockpit is reinforced with heavy upper and lower longhorns. (See figure 10.) Bulkhead No. 5 immediately aft of the pilot is so designed that with the armor plate installed it will support the fuselage in the event of a turn-over. The bulkheads aft of station 12 are reinforced sufficiently to enable them to take concentrated tail wheel and empennage loads. |
b. Wing and Tall Fillets, - Fillets are provided at the intersections of the wing and empennage with the fuselage. The wing-fuselage fillet is constructed of aluminum-alloy sheets (24ST) which are spot-welded together and attached by means of screws. The tall fillets are composed of four sections of Alclad 24ST and are also attached by means of screws. When effecting repair to the wing-fuselage fillet, it is important to maintain the original contour. Flush patches must be used to prevent formation of eddies in the airflow. | |
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