Circular, TiC Toolbox Featured Articles: 7 Comments | Add a Comment Drawing an Ellipse: The String Method by Wm. Todd Murdock on September 6, 2013 Step-by-step instructions for drawing an ellipse with the string method—a complimentary Quick Reference Guide to TiC full-length articles, The Elegant Ellipse and Finding the Right Angle. Comments/Discussion 7 Responses to “Drawing an Ellipse: The String Method” David August 26, 2015 What a great set of simple instructions. After watching dozens of videos with exhaustive instructions it is a breath of fresh air to see this laid out this way. I am doing this ellipse on a 4×8 ft steel sheet and welding the rods to it. I am using wire instead of string and then taking my plasma cutter to it. I am excited to see the results. Thank you again. Reply John April 30, 2016 Simply elegant as all good things should be. Reply Brad May 26, 2017 So clear and so practical. Like David, I just watched 30 minutes worth of videos and this is the most straightforward explanation I have seen. My fire pit cover will be more refined thanks to you! Reply Lee January 19, 2018 This works great, but it’s not clear how to establish point C here. The center peak (point C) should be 1/6 of the overall width. So for a 60″ wide cased opening, the center would be 10″ above the major axis or spring line. For a 48″ wide opening, the center would be 8″ above the spring line and so on. In other words a 6:1 ratio for the rise relative to the overall length. Reply Wm. Todd Murdock January 19, 2018 This method covers drawing an ellipse with known dimensions. For an opening with a semi-elliptical head, point C is located at the desired rise above the midpoint of the spring line (major axis). As far as a fixed relationship between height and width, I’ve seen countless examples in both classically inspired and modern architecture that fall outside the 6:1 ratio. Reply Diego September 23, 2019 Sweet! Thanks for this explanation! Reply David Culp June 21, 2021 Very helpful. I was trying to find the proper ellipse to fair the line from my wingtip nosepiece to the tip, if you can imagine 1/4 of an ellipse. It worked beautifully, once I understood it. My semi-major axis was 8” and my semi-minor axis was 4.5”. Thank you. Reply Leave a Reply Click here to cancel reply. Please note: Your first comment will be held for moderation/review by our staff before it appears. After you have one comment approved, all of your subsequent comments will appear immediately. Read our comment policy for more information. Upload FileYou can include an image in your comment by uploading it below. Once you select a file, it will be uploaded and attached to the end of your comment.