Engineering graphics i and ii by arunoday kumar tech max publication, pune 2. Department of mechanical engineering ge8152 engineering. C apme rmkcet batch 20142015 regulation 20 unit i conic sections ellipse eccentricity method draw the locus of a point p moving so that the ratio of the distance from a fixed point f to its distance from a fixed straight line is 23. First that the origin of the xy coordinates is at the center of the ellipse. Engineering graphics quick revision pdf notes, book, ebook. Importance of engineering graphics use of drawing instruments. Draw an ellipse whose focus distance from is 70 mm and e is 0. Construction of conic curves by eccentricity method. Department of mechanical engineering gee 214 engineering. Former scientist in drdo and professor at ashoka institute of engineering and technology. Mar 30, 2021 engineering graphics complete notes, 1st semester edurev notes is made by best teachers of. In the above common equation two assumptions have been made. Unit i plane curves and introduction to orthographic projection curves used in engineering practices. Planchard, cswp, solidworks accredited educator sdc publications.
The sum of the distances is equal to the length of the major axis. Conics construction of ellipse by eccentricity method yes 3. The length of the minor and major axes as well as the eccentricity are obtained by. Then the equation of the circle is given by x h y k r 2 2. Engineering graphics ge8152 semester 1 regulation 2017. Engineering graphics with solidworks 2016 and video instruction engineering graphics with solidworks 2016. The points where the ellipse intersects its focal axis are the vertices.
In geometry, the major axis of an ellipse is its longest diameter. Eccentricity distance of the point from the focus distance of the point from directrix e ellipse, e 1. Take suitable point on each curve and draw tangent and normal to the curve at that point. Construction of ellipse, parabola and hyperbola by eccentricity method construction of cycloid construction of involutes of square and circle. Methods of drawing tangents and normals three cases. Engineering graphics pdf notes engineering graphics notes pdf. Pdf engineering graphics as per first year engineering. This document is highly rated by students and has been viewed 87044 times. Construct a hyperbola with the distance between the focus and directrix as 40 mm and eccentricity as 32.
Apr 01, 2021 for any ellipse, the sum of the distances pf1 and pf2 is a constant, where p is any point on the ellipse. Ge 8152 engineering graphics common to all branches first semester unit 1 plane curves and freehand sketching 1. Pdf engineering curves, projection of points, lines and planes, orthographics, projecton of solids, section of solids. Ask students to make a conjecture e about the eccentricity of a circle before going further. Ge 8152 engineering graphics common to all branches first. Conics construction of ellipse, parabola and hyperbola by eccentricity method construction of cycloid construction of involutes of square and circle drawing of tangents and normal to the above curves.
Here, for the ellipse and the hyperbola, a is the length of the semimajor axis and b is the length of the semiminor axis. Ellipse a conic is said to be an ellipse if its eccentricity e is less than 1. As the distance between the center and the foci c approaches zero, the ratio of c a approaches zero and the shape approaches a circle. Unit i plane curves and freehand sketching basic geometrical constructions, curves used in engineering practices. Draw the axis perpendicular to the directrix through any point c on it. In part i considerable space has been devoted to engineering graphics, particularly. An ellipse has the major axis and minor axis in the ratio 3. The common definition of conic sections is that these are the loci set of points that are. The distance around an ellipse does not rescaleit has no simple formula. These notes are according to the r09 syllabus book of jntu.
K, sreekanjana g, engineering graphics new age international publishers. Draw an ellipse if the distance of focus from the directrix is 70 mm and the eccentricity is 34. Methods of drawing an ellipse engineering drawing joshua. Engineering graphics free ebook download as powerpoint presentation.
The semiminor axis minor semiaxis of an ellipse or. Eccentricity is useful, but i will not require you to memorize the formula for eccentricity. Bis conventions, specifications, layout of drawings, lettering and dimensioning. Engineering graphics complete notes, 1st semester edurev. The value of eccentricity is less than 1 for an ellipse, equal to 1 for a parabola and greater. Engineering graphics with solidworks 2016 and video instruction engineering graphics with solidworks 2016 and video instruction a stepbystep project based approach david c. Perigee moon apogee earth 768,800 km 767,640 km figure 10. Engineering graphics as per first year engineering syllabus of dr. Plane curves and introduction to orthographic projection curves used in engineering practices. Draw ellipse, parabola and a hyperbola on the same axis and same directrix. Feb 21, 2015 unit 0 importance of engineering graphics, use of drawing instruments. The eccentricity e of an ellipse is the ratio of the distance from the center to the foci c and the distance from the center to the vertices a. Draw a perpendicular line ab directrix and a horizontal line ce axis. Explore professional development books with scribd.
Pdf ge8152 engineering graphics lecture notes, books. Pdf engineering drawing as per the first year engineering. Definition of eccentricity the eccentricity of an ellipse is given by the ratio e c a. Engineering graphics, engineering drawing,step by step procedure of ellipse construction. For ellipse, eccentricity, e eccentricity, e 1 for hyperbola, eccentricity, e 1 all dimension in mm to be written on the right bottom page of each chapter above 10mm, with letter height 10 mm. A circle is the set of all points in a plane equidistant from a particular point. Pdf engineering graphics workbook bibin chidambaranathan.
The following are the various drafting tools used in engineering graphics. Engineering graphics is a basic subject for all branches of diploma engineering and. The recommended textbooks for this class are as stated. Take distance of focus from the directrix equal to 50mm and eccentricity ratio for the ellipse, parabola and hyperbola as 23, 1 and 32 respectively. Draw an ellipse of major diameter 80 mm and minor diameter 50 mm, half by concentric circle. Engineering drawing is a means of communication used by engineers to represent to scale the. K v nataraajan a text book of engineering drawing 4. Drawing an ellipse using the arcs of circle method example 1.
Mark the focus point f on the axis line 50mm from the directrix. Drawing of tangents and normal to the above curves. The horizontal line and vertical that pass through the center. Me 1101 engineering graphics kings college of engineering mechanical question bank page no. How to draw ellipse in engineering graphics youtube. Parabolas geometric definition a parabola is the set of points in the plane equidistant from a fixed point f called the focus and a fixed line called the directrix.
Engineering curve 1 ellipse perpendicular free 30day. Analytic geometry circle let r be the radius of a circle and let h, k be the coordinates of the center of the circle. C apme rmkcet batch 20142015 regulation 20 unit i conic sections ellipse eccentricity method draw the locus of a point p moving so that the ratio of the distance from a fixed. Second that the longer axis of the ellipse is along the xaxis. Construct an ellipse given the distance of the focus from the directrix as 60 mm and eccentricity as 23.
The eccentricity of a circle is zero by definition, so there is nothing to calculate. Sep 30, 2010 15 cm represent 60 mm long amie base on h. Draw the ellipse when the major is axis is 5mm by concentric circles method. Draw a tangent and normal at a point p located at 30mm above the major axis. Ellipse, parabola and hyperbola are called conic sections because these curves appear on the surface of a cone when it is cut by a cutting plane. Ge8152 engineering graphics unit i plane curves and freehand sketching basic geometrical constructions, curves used in engineering practices. Circles notice that an ellipse becomes a circle when a b r. Engineering graphics curves conic sections ellipse eccentricity method arc of circles method concentric circles method loop of thread method rectangular method parabola eccentricity method rectangular method tangent method hyperbola eccentricity method cycloids cycloid epicycloid hypocycloid involute eccentricity method eccentricity 23 focal distance 50 now 11 as radius. Also draw tangent and normal to the curve at a point on it 20 mm above the major axis.
Engineering curve 1 free download as powerpoint presentation. To construct an ellipse when the distance of the focus from the directrix is equal to 50mm and eccentricity is 23. Pdf ge8152 engineering graphics mcq multi choice questions. Students are requested to refer the book and write the procedure for problem 3. The eccentricity of parabola is less than the eccentricity of a hyperbola in case of an ellipse, the distance of an end of the major axis from any focus is equal to halfof the major axis the locus traced by a point in such a way that the sum of its distances from two fixed points is always constant is called ellipse. Depending on the position of the cutting plane relative to the axis of the cone, three conic sections can be obtained ellipse, parabola and hyperbola. Ge 8152 engineering graphics common to all branches. Draw an ellipse when the distance between the focus and directrix is 50mm and eccentricity is 23. Draw an ellipse when the distance of focus from the directrix is equal to 35 mm and eccentricity is 34. In this engineering graphics notes download links are listed below please check it link. Eccentricity is found by the following formula eccentricity ca where c is the distance from the center to the focus of the ellipse a is the distance from the center to a vertex.
Natarajan a text book of engineering graphics, dhanalakshmi publishers, chennai, 2009. Inscribe an ellipse in a rectangle of x80mm by intersecting lines method. Basic geometrical constructions, curves used in engineering practices. Department of mechanical engineering ge8152 engineering graphics multiple choice questions unit i plane curves and freehand sketching 1. Draw an ellipse by using rectangleoblong method, taking major and minor axis as 100mm and 60mm respectively.
May 15, 2016 drawing ellipse by eccentricity method 1. Multi choice questions darshan institute of engineering. Visit the following websites to learn more about this book. Construction parabola and hyperbola by eccentricity method yes. The distance between directrix and focus point is 70 mm. Babasaheb ambedkar marathwada university january 2012. The eccentricity of an ellipse is a measure of how nearly circular the ellipse. Taking a focus 2 from a directrix, i z an ellipse, eccentricity j. Construction of ellipse, parabola and hyperbola by eccentricity method only. Besant agrawal, c m agrawal engineering drawing, tata mcgraw hill education private limited. Draw a horizontal line as shown construct an ellipse when the distance of the focus from its directrix is equal to 50mm and eccentricity is 23.
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