No supplementary references are needed for this task.

1. Introduction

In task one of this subcourse, we covered orthographic projection and freehand drafting. In this task, we will cover drafting instruments and the fundamentals of geometric construction.

2. Drafting Instruments

In the following paragraphs, we will cover some of the drafting instruments that may be encountered and used; however, we will not cover such common instruments as pencils and erasers.

a. Scales. Scales are used for linear measuring. The scale most commonly used by a draftsman is one with its inches graduated into sixteen divisions, with each division measuring one-sixteenth of an inch. Figure 16 (on the following page) shows part of a "16 to the inch" scale, together with some sample measurements. Unlike a real scale, the scale in figure 16 has the first inch completely labeled to help you become familiar with the different fractional values. Measurements more

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Freehand Sketching An Introduction

Freehand Sketching An Introduction

Learn to sketch by working through these quick, simple lessons. This Learn to Sketch course will help you learn to draw what you see and develop your skills.

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