ENGINEERING DRAWING AM 09 SYLLABUS University of .
AM Syllabus (2016): Engineering Drawing 5 4. Helices and screw threads The helix: righthand and lefthand. The true length of the helix. The helix angle, excluding its application as being the true angle of the tangent drawn at any point on the helix. Applications of the helix: the helical vane; round, square and rectangularsection