Page 27 - CITS - ED - Mechanical

ENGINEERING DRAWING - CITS

• Mark the intersecting points as P , P ...etc.
2
1
• Complete the hyperbola by a smooth curve passing through these points.
Fig 1

Exercise 2.6
Given the double ordinate, abscissa and distance between vertices (Fig 2)

• Draw a hyperbola with double ordinate 70 mm and abscissa 30 mm (rectangle method) and the traverse axis
70 mm.
• Draw the rectangle ABCD 70 x 30 mm.

• Mark the mid points V, X on AB and CD.
• Join VX and extend it outside to '0' 35 mm (70/2) from V.
• Divide AD and BC into 4 equal parts. Mark them as 1,2,3,1 ,2 ,3 .
1
1
1
• Join these points to V by straight lines.
• Divide DX;XC into 4 equal parts, each mark them as a,b,c,c ,b ,a .
1
1
1
• Join '0' to these points by straight lines.
• Mark the intersecting points as P ,P etc as shown.
1 2
• Join V-D-C with a smooth curve through P ,P ,P etc.
1
2
3

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CITS :Engineering Drawing (Mechanical) - Exercise 2