How to Create Oblique Drawings: Techniques and Tips for Engineering and Drafting

Oblique Drawing

front graphical projection with depth shown usually 30 or 45 degrees back. Appears distorted.

Oblique drawing is a commonly used technique in engineering and drafting to depict three-dimensional objects on a two-dimensional surface. It is a type of axonometric projection, where the object is presented in a way that all the three dimensions are visible in the drawing. In oblique drawing, the object is depicted at an angle where two of the three axes are visible and drawn to scale, while the third axis is drawn at a non-parallel angle to add depth to the image.

There are two types of oblique drawing: cavalier and cabinet. Cavalier oblique drawing involves drawing the object with full-scale length and height, while maintaining the depth of the object at 50% scale. Cabinet oblique drawing, on the other hand, reduces the depth of the object to 25% scale.

To begin drawing in oblique projection, first, draw a horizon line that is perpendicular to the front plane of the image. Then, decide on the angle at which you want to present the object by choosing the angle of the oblique plane. Draw the front elevation of the object in its true size and shape. Finally, draw the inclined plane perpendicular to the front plane and add the distorted dimensions to the object.

Oblique drawing can be a useful technique in architectural and engineering design, as it allows for a clear view of the object from multiple angles. However, it should be kept in mind that oblique drawings can also introduce a degree of distortion due to the non-parallel projection angle used.

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