hi,

here is an example of the draftmen's method. the results are pretty typical of what I have gotten trying some of the other methods. they just don't seem to work. i could be doing something wrong. but it seems the error is quite large. if i have done everything right, that would leave some of the mechanical drawing tools in the previous link as the only way to draw an ellipse accurately in real life. i imagine you could still define the ellipse by its height and width and that definition could be used by the mechanical tools and cad programs such as moi.