A little more about creating an elliptical plan

Following up on the ellipse.

D.B. Laney's avatarA Woodworker's Musings

Several folks wrote and said that they were having some difficulty getting their heads around this method.  Well don’t despair.  When I first read about this method, it took me a couple of days for it to sink in.  And, if you don’t have much experience with projective drawing, it’ll take a bit of cogitation.  Of course, at my age, everything takes a long time to sink in.  But it doesn’t necessarily stay “sunk in” for long.

But here’s a little more graphic information that might help.  First off, I elongated the major axis to make the model a little more easily understood.  So remember, A-B is the Minor axis, A-C is the Major axis.  I’ve divided the A-B line into equal segments (with a couple of little “cheater” segments at the ends.

001

Again, I extend the segments at right angles to the diagonal line and transfer the line measurements…

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