**PRINCIPLES OF DRAFTING AND SHOP DRAWINGS - OD1641 - LESSON 1/TASK 2**

Step 4. Define the intersection of arc (X-2) and line X-B as point 3 (figure 34,

view B, on the previous page).

Step 5.

Bisect line 3-B and draw the bisect line so that it intersects an

extension of the line X-O-Y. Define this intersection as point 5 (view C).

Step 6.

Define the intersection of the bisect line and line O-B as point 4 (view

C).

Step 7.

Using point 5 as center, draw an arc of radius 5-X as shown in view C.

Also draw an arc of radius 4-B as shown in view C. These two arcs will generate

half of the ellipse. Draw the other half by symmetry (view D).

4.

Conclusion

In this task, we covered drafting instruments and the fundamentals of geometric

construction.

In the next task, we will discuss the theory and fundamentals of