4. Since there is only one line 7 in the stretchout,

you will need to transfer the measurement of line 7 in

the elevation to the stretchout only one time.

5. Finally, connect the points at which the arcs

have intersected each of the elements, with a curve

running from line A to the opposite line 1. Smooth out

your curved line, add the allowances for seams, and the

pattern is completed. If this final line has serious

irregularities, you have made a mistake in your

measurements. Your final stretchout should look

exactly like the one made by projection in figure 12-40.

To obtain the pattern by projection, you simply

project parallel broken lines from the points of

intersection on the miter to lines with the same number

in the stretchout. These broken lines are drawn at right

angles to the numbered lines and parallel to line AB.

They are drawn from the point where the numbered

lines intersect the miter CD to the point at which they

intersect the most distant line in the stretchout with the

same number. Again, the pattern is completed by

connecting the points of intersection on the stretchout

with a curved line. Remember, the more care you take

in drawing the elevation, stepping off the half-plan, and

transferring the measurements from the elevation to the

stretchout, the more accurate your pattern will be.

Figure 12-41 is a pictorial view of the plan you have just

laid out.

3. Then, measure line 2 in the elevation, and

transfer this measurement to the two lines marked 2 in

The parallel line method can also be used to develop

the stretchout. Repeat this procedure for lines 3, 4, 5,

an elbow of any desired diameter, depth of throat, or

and 6.

number of pieces. Figure 12-42 shows the development

12-15