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wcwyder I think U didn't understand something, the circleis suppose to be on the top plane no matter that the hole on the doom isn't becoming one, actuality that's the whole point. Edited by: super_puh
No, the projection of the hole in the doom onto the base plane is a
circle. The hole in the doom or the head must be an ellipse
because the doom surface is not parallel to the base plane. I
understand the situation completely. Look at Ahmed's shetches.
The center of the ellipitical hole, generated from the elliptical
sketch on the tangent plane, is less than 1200 mm from the center of
the doom, because it is projected downward and perpendicular to the
tangent plane. The hole is not cut in the tangent plane but in
the doom surface below the tangent plane and inward toward the center
of the doom. Thus to place the center of the cut ellipitical hole
at exactly 1200 mm, the tangent point of the tangent plane will need to
be greater than 1200mm, around 1218 mm. One must remember that we
are talking about cutting a 19.7 foot diameter ellipitical hole in a
149.6 foot diameter elliptical doom. From my 40 some years
experience in manufacturing, I am sure neither the hole diameter nor it
distance from the center of the doom can be measured to a repeatability
of one mm. I will e-mail a sketch.
I am still here.. just a little busy. I will come back to this problem as soon as I can get around to it. Thank you all for your suggestions and ideas.
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