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Drawings

Drawings

  • There a relation that collects Drawings and prints are the link between the engineers who design an aircraft and the workers who build, maintain, and repair it.
  • A print may be a copy of a working drawing for an aircraft part or group of parts, or for a design of a system or group of systems.
  • They are made by placing a tracing of the drawing over a sheet of chemically-treated paper and exposing it to strong light for a short period of time.
  • When the exposed paper is developed, it turns blue where the light has penetrated the transparent tracing. The inked lines of the tracing, having blocked out the light, show as white lines on a blue background.

 Types of Drawings:    

  • Drawings must give information such as the size and shape of the object and all its parts, specifications for material to be used, how the material is to be finished, how the parts are to be assembled, and any other information essential to making and assembling the object. Drawings may be divided into three classes: detail, assembly, and installation.

Detail Drawing:

  • A detail drawing is a description of a single part, describing bylines, notes, and symbols the specifications for size, shape, material, and methods of manufacture to be used in making the part. Detail drawings are usually rather simple. When single parts are small, several detailed drawings may be shown on the same sheet or print.

Assembly Drawing:

  • An assembly drawing is a description of an object made up of two or more parts. Its primary purpose is to show the relationship of the various parts. An assembly drawing is usually more complex than a detailed drawing and is often accompanied by detailed drawings of various parts.

 Installation Drawing:

  • An installation drawing is one that includes all necessary information for a part or an assembly in the final installed position in the aircraft. It shows the dimensions necessary for the location of specific parts with relation to the other parts and reference dimensions that are helpful in later work in the shop.

Sectional View Drawings:

  • A section or sectional view is obtained by cutting away parts of an object to show the shape and construction at the cutting plane. The part or parts cutaway is shown by using section (crosshatching) lines. Types of sections are described in the following paragraphs.

Full Section:

  • A full section view is used when the interior construction or hidden features of an object cannot be shown clearly by exterior views.

Half Section:

  • In a half section, the cutting plane extends only halfway across the object, leaving the other half of the object as an exterior view. Half sections are used with symmetrical objects to show both the interior and exterior.

Revolved Section:

  • A revolved section drawn directly on the exterior view shows the shape of the cross-section of a part, such as the spoke of a wheel.

Removed Section:

  • A removed section illustrates parts of an object. It is drawn like revolved sections, except it is placed at one side and often drawn to a larger scale than the view indicated to bring out pertinent details.
  • is an illustration of the removed sections. Section A-A shows the cross-sectional shape of the object at cutting plane line A-A. Section B-B shows the cross-sectional shape at cutting plane line B-B. These sectional views are drawn to the same scale as the principal view.

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