The resin also bonds to other structural components such as metal attachment brackets or metal bushings. The glass fibers give most of the strength and the resin maintains the shape. Glass Fiber Reinforced Plastic (GFRP) GFRP is very thin glass fibers bonded together by resin. Types of Structure The DA 40 NG is constructed from 2 main types of composite structure.
ATA CHAPTER FOR PAINTING AIRCRAFT SERIES
ATA 51 – STANDARD PRACTICES & STRUCTURES TRAINING USE ONLY Structure D-03 DA 40 Series (Austro Engine) Issue: July
ATA CHAPTER FOR PAINTING AIRCRAFT SKIN
A polyurethane paint finish protects the outside skin of the airplane from ultraviolet rays and humidity. The passenger door is a CFRP molding with inner and outer frames. The canopy has a large one-piece acrylic glass window. The canopy is a CFRP molding with inner and outer frames which bond together. Each shell has GFRP skins with a rigid foam core. Three pairs of ribs give strength to the center area. The horizontal stabilizer has a front spar and a rear spar.
The horizontal stabilizer has top and bottom shells. The shells have rigid foam cores and bond together. Each shell has mixture of CFRP and GFRP cloth. The flaps and ailerons have top and bottom shells. A removable GFRP tip attaches to the wing shells and outer rib with screws. An end rib closed the outboard end of the wing. A rear web closes the trailing edge of the wing. Glass cloth fillets attach the spar caps to the shear web. The shear web has GFRP skins and a rigid from cor. The number of layers in the spar caps decrease from root to tip. Many layers of uni-direcitonal carbon fiber make the spar caps. The front spar on one side is the same as the rear spar on the opposite side. The aft part of the left and right fuselage shells make the left and right shells of the vertical stabilizer. The vertical stabilizer is part of the fuselage. Each shell has a carbon fiber reinforced plastic (CFRP) outer skin, a rigid foam core and a GFRP inner skin. It has front and rear spars and a root rib made in three parts. Some components have layers of carbon fiber cloth to give more strength and stiffness. Many layers of glass cloth bond together to make each molding. All of the main structural components are GFRP rigid moldings.
Rigid foam inserts give stiffness to the fuselage shells where necessary. The fuselage shells have many layers of glass cloth. Two glass fiber reinforced plastic (GFRP) half-shells make the fuselage skin. The DA 40 NG fuselage has a semi-monocoque structure. It has a ‘T’ tail and a fixed tricycle landing gear with a nose wheel that can caster. General The DA 40 NG is a single-engine, low-wing monoplane of composite construction.
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