Page 21 - CITS - ED - Mechanical

ENGINEERING DRAWING - CITS

Fig 11

Exercise 1.15

Construct an ellipse by four centre method - Major axis = 80 mm and Minor axis = 40 mm - Type B. (Fig 12)
• Draw the rectangle EFGH (80 x 40) and draw AB & CD represent major and minor axis.

• Join EC
• Bisect AE and mark P the mid-point.
• Join DP meeting EC at K.
• Draw perpendicular bisectors of KD and extend DC and locate point `S'.
• 'S' as centre SD as radius draw the arc KD.
• Similarly get the point 'R'.

• Join AK and draw perpendicular bisector on it, and meet AB at f .
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Fig 12

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CITS :Engineering Drawing (Mechanical) - Exercise 1