topic Re: Loft in not working to make a nose in Fusion Design, Validate & Document Forum

Loft in not working to make a nose

matt_bolty — Wed, 17 Sep 2025 15:28:50 GMT

I am following a tutorial on making a 3d model of a boeing 757. I have hit a bit of a snag which is driving me a little mad with lofting when making a nose cone.

I have made the fuselage minus the nose cone and converted the body into a component. The tutorial deleted the original body and so did I - which may have been a big mistake! Because, when I projected the flat front of the fuselage from the body, it gave me a single curve with no points. But now I am re-doing the nose, I projected from the component and it has several points. And there seems to be no way of converting this into a single curve which in itself seems ridiculous!

When I try to loft, I click the three profiles as show in the photos and before I hit ok, I get no warnings and it does seem like it will work. But when I hit ok it throws the error: "1 Reference failures: Closed profiles can not be coplanar for a loft" and "compute failed". It used to work perfectly when the projected curve was one line but now it just won't.

Any suggestions? Thank you in advance!

Re: Loft in not working to make a nose

jeff_strater — Wed, 17 Sep 2025 14:56:07 GMT

If you can share the file here, it will be easier to help you. But, a couple of strategies to consider:

the nose (in fact, the whole plane) is symmetric along the length of the body. Just model 1/2 and mirror it.
use Loft to a Point (by selecting just one point for a profile), and set the type to tangent. That's how I always model any kind of rounded "nose" shape. You can add rail curves for better shape control

Re: Loft in not working to make a nose

matt_bolty — Wed, 17 Sep 2025 15:28:16 GMT

here you go! I just don't understand why it worked when I projected off a body and not a component agh

Re: Loft in not working to make a nose

wersy — Wed, 17 Sep 2025 15:46:37 GMT

Split the profile and use only the half.
You need also a rail.

Re: Loft in not working to make a nose

matt_bolty — Fri, 26 Sep 2025 19:24:06 GMT

thank you! I'm having a worse time of it with airfoils now - trying to add a wingtip and oh my god it refuses to work haha. works fine if I design my own with point splines but if I import a NACA DAT file it just refuses. Maddening!

Re: Loft in not working to make a nose

wersy — Fri, 26 Sep 2025 19:32:11 GMT

If you show us both versions, we can figure out what the problem is.
But please create a new topic for this.

Re: Loft in not working to make a nose

matt_bolty — Fri, 26 Sep 2025 19:44:38 GMT

will do! posted the first issue already. Airfoils are very tricky! As is creating perpendicular planes from inclined planes - all in the post

Betreff: Loft in not working to make a nose

wersy — Fri, 26 Sep 2025 21:30:29 GMT

I don't understand what kind of issues you have with airfoils.
You already posted it?