Radial Line Pattern Development

# 22 Frustum of a Cone

- Draw an , including the
**point**. - the base of the elevation view and divide it into 6 equal parts.
- Label the profile from 1 to 7 and project the divisions vertically into the base of the cone.
- Project the from the base to the apex of the cone.

- Locate a radius point where you want to develop the pattern.
- With your compass, take the large from the elevation view and swing an arc from the radius point.
- Set your compass to the small slant height and swing it from the same radius point.
- Along the (large) arc, establish a starting point for the pattern and draw a line back to the radius point.
- Set your compass to a step-off. From your starting point, swing it 12 times along the stretch-out arc.
**In this case, this must be done on the large or stretch-out arc because that is where the step-off is taken from.** - Connect the last point back to the radius point to complete the pattern.

looking at the front or side of something, to have elevation (height), 2D

the intersection point of a cone, as seen in the elevation view

a half of a plan view, drawn on the outside of an object

a line representing an edge or bend

the hypotenuse of a cone, outside edge. The slant height is always a true length in the elevation view

the angle or arc which encompasses a radial line pattern