# Segmenting an ellipse

 Forum topic by ken_c posted 01-04-2015 04:16 AM 1401 views 0 times favorited 11 replies
 ken_c322 posts in 2940 days 01-04-2015 04:16 AM OK Lumberjocks here is a tough question, it involves segments of an ellipse. I needed to make an ellipse and I wanted to make it out of segments rather than use an entire panel of maple and my Archimedes trammel. I will use the trammel on the glue up of segments. I was hoping that there was an easy way to calculate 8 segments (2 sets of 4 identical ones). I consulted my “circular work in carpentry and joinery” book but did not find that info. Then Google, but I only found things well above my mathematical understanding. So I resorted to cad, drew it, divided it into 8 segments and measured the angles and lengths of the strait stock needed. That method works but I was hoping to just run some calculations like I do for a segmented circular turning. Has anyone out there got the info needed for the calculation task? Thanks There are 3 angles, two segment lengths and one width as a result of cad work. in this case 17, 19, 38, 6 13/32, 4 9/16 and 3 1/4… here is the first stage of the resulting cad work: