strange behavior of loft to build a airplane body

patrick_gubelmann

Hello

I have a printed drawing of a airplane model. Now I'll modeling this in 3D.

I took the sliced drawings of the body and did some sketches. After I used the loft feature I got a strange body.

What is my fault and how can I fix it? Is there maybe an other possibility to modeling my airplane body?


https://cad.onshape.com/documents/cd50e7970ecf9c05cae60b82/w/5ae4b6e686a105ac70dd02ee/e/e68c7512991a67ae0d50a9fc

Thank you for your help

Patrick

owen_sparks

Howdy

Your profiles change the number of vertices as we go down the aircraft so OS does not know which vertex to match with what.

Here is one approach using a pair of "3d fit spline" curves as guides.



https://cad.onshape.com/documents/526fb2f993369d42606a01ce/w/8861fc7b3bac8ff569818eab/e/9bb68b2f7cab19cf4b42c0c4

Cheers, Owen S.

patrick_gubelmann

Thank you @owen_sparks. As you can see it works.

I put four guides (top, bottom, left, right) into the loft. Unfortunately I receive different lines at the sides. So I tried to put some guides along that lines. However it didn't work.

Is there an other possibility to influens this lines to be equal?

Thank you

Patrick

konstantin_shiriazdanov

I have a Path FS that unites a number of connected sketch curves into one continuous path, it is usefull when you need to sweep regions with different number of edges like in this case.

https://cad.onshape.com/documents/dd3b4d3cff189e62ad1466ac/w/00b48d091acf3b8463c53dd4/e/b7da85d0be0634e6cc41e95c

patrick_gubelmann

konstantin_shiriazdanov. It works!