• Home
  • Download PDF
  • Order CD-ROM
  • Order in Print
REVERSE, OR OGEE, CURVE
ELLIPSE  BY  FOUR-CENTER  METHOD

Engineering Aid 3 - Beginning Structural engineering guide book
Page Navigation
  123    124    125    126    127  128  129    130    131    132    133  
Figure 4-43.-Conic sections: ellipse, parabola, and  hyperbula (left to right). Figure 4-44.-Ellipse by pin-and-string method. ELLIPSE BY C  as  a  center,  strike PIN-AND-STRING   METHOD F  and  F´.  The  points arcs  intersecting  AB  at F  and  F´  are  called  the foci  of  the  ellipse.    Set   a   pin   at   point   C, The dimensions of an ellipse are given in terms another   at   F,   and   a   third   at   F´.   Tie   the of  the  lengths  of  the  major  (longer)  and  minor end of a piece of string to the pin at F, pass the (shorter) axes. Figure 4-44 shows a method of con- string around the pin at C, draw it taut, and fasten structing an ellipse that is called the pin-and-string it to the pin at F´. Remove the pin at C, place the method.  The  problem  is  to  construct  an  ellipse pencil point in the bight of the string, and draw with a major axis, AB, and a minor axis, CD. Set the ellipse as shown in view C, keeping the string a compass to one-half the length of AB, and, with taut  all  the  way  around. 4-15







Western Governors University

Privacy Statement
Press Release
Contact

© Copyright Integrated Publishing, Inc.. All Rights Reserved. Design by Strategico.