ABANA National Curriculum 1.4 - Tapers?

A look at 5 different tapers.
For the tapers they will in grow in length from the base stock as the taper is drawn out. In order of growth they are:
Base Stock (Shortest)
Chisel
Square
Octagonal
Round (Longest)
The final lengths of the tapers can be calculated using the following formulas.
Non Tapered Vol = L * W * H
Square (Pyramid) Vol = (L * W * H) / 3
Octagonal (Pyramid) Vol = 2 * (1 + sqrt(2)) / (3 * L * L * H)
Round (Cone) Vol = 3.14 * radius * radius (H / 3)
Chisel (Prism) Vol = volume = 0.5 * b * h * length, where b is the length of the base of the triangle, h is the height of the triangle, and length is prism length
SOR method = Square, Octagon, Round
Curriculum Requirements:
1.4 - TAPERS (square, octagon, round, chisel tip and diamond)
1.4.1 Student should understand how and where to hold material on the anvil to draw
down tapers. The use of tongs should be introduced. Use of the slack tub should be
introduced.
1.4.2 The square, octagon, round rule (SOR) should be understood
1.4.3 Student to demonstrate the knowledge of SOR and how progressing through the
stages effects the length of the taper
1.4.4 Produce samples of round, square and diamond tapers that are same length,
straight sided with the ends centered along the center-line of the parent bar.
Filmed at Pioneer Farms in Austin TX:
www.pioneerfarms.org/