Boeing 737 Fuselage DesignINTRODUCTIONTo study the stresses around a crack developed in a fuselage and its propagation, we must first make the CAD design of a fuselage. In particular, a section of the fuselage frame is required to achieve the design goal. Boeing data provided in the public domain serves as a fuselage design guideline for this project. To successfully design the fuselage we need the detailed dimensions of the following parts: a) Fuselage skin b) Bulkhead c) Spar) Rivets The above parts are the essential components in the fuselage structure of an aircraft and perform the following function. a) Fuselage skin The semi-monocoque The architecture requires that the body structure is composed of a skin that hides the main skeletal structure of the vehicle body. The distinctive feature of this structure is that all loads acting on the fuselage are transferred to the structure frame through the cladding. On the other hand, early aircraft were built using lattice structures, typically of wooden or steel tubes, which were then draped in fabric, such as linen or cotton. The cladding was structurally superfluous since the strength of the structure was provided solely by the airframe. The liner was essentially dead weight, as well as providing a smooth, sealed surface. The cladding, usually made of aluminum sheet, is fixed by riveting or gluing with special adhesives. Most light metal aircraft are built using this process. Both monocoques and semi-monocoques are referred to as "stressed skin" structures. This is due to the fact that a significant part of the external load (i.e. from the wings, empennages and engine) is absorbed by the fuselage skin. Also, all ki...... middle of paper ......and projection. Usually a 3-D model is constructed using 2-D sketches, while the 2-D sketch of a model can be obtained using drawing tool.FIRST ANGLE PROJECTIONThe object is imagined positioned in the first quadrant of the axis system. It is located between the observer and the projection plane. It is assumed that the projection plane is a non-transparent plane. When views are drawn in their relative position, the right side view is drawn on the left side of the elevation and the top view comes below the front view. THIRD ANGLE PROJECTION The object is imagined to be positioned in the third quadrant of the axis system. The projection plane is located between the observer and the object. It is assumed that the projection plane is transparent. When views are drawn in their relative position, the right side view is drawn on the right side of the elevation and the top view is above the front view.