Hello,
I want to create a loft between the two profiles below and use the 4 guide rails. There is no problem with the two vertical rail, but there is an error for the two horizontal rails that do not touch all the profiles. When I project the second profile circle, the point of the created horizontal line is drawn slightly outside the circle (attached image) and I think this is the reason for the error. But what is the solution? Thank you for your guidance
Loft guide rail line question
From that pic.
Project the circle is incorrect. The purple line is diameter of circle. Centre of circle is above rail sketch. Therefore purple line is useless and must be deleted.
For Rail sketch, Project > Intersect the circle, you get 2 purple dots. Confirm by hiding circle sketch.
Connect rail curves to purple dots in your sketch.
Also - front profile has way too many spline points - will cause nightmares for you.
Edited: Oops I see you already got the nighmare.
You didn't mention the tube. Project > Intersect the tube, and tangent connect the rails to the purple lines.
Yellow icons are fixable with UNDO when they show up, but not after a file save. The rails you had were not connected at the front profile either.
Rear profile of the Lofted tube is missing but looks like an Extrude would do it.
Might help….
Accepted solution
To get the Loft from what was supplied.
Hide all bodies and sketches except the horizontal rails.
Edit this Rail sketch. Window select all and delete.
Show Sketch 2 and tube body
Start Project > Intersect for Sketch 2 and select one of the Splines, select another spline. > OK
Hide Sketch 2 (should see 2 purple dots where the splines were.)
Project > Intersect select the grey face of tube. > OK
Hide tube. (Should have purple rectangle where the tube was)
Delete front purple line.
Start Line command - Click hold on the end point of the long purple line, drag to the purple point on same side of the sketch. (You get a tangent black arc)
Repeat for the other rail. Finish sketch.
Now show Sketch 2, 3, 4 and Tube,
Loft, for Profiles - select sketch 2 splines, then the front edge of the body tube (turns black temporary)
and for Rails, select all rails from sketch 3, 4, and 5. Ok.
Change Connected to Tangent for the (body) profile 2
Do not use circle in sketch 1 for the Loft as the body edge has better stability.
Too many spline points - looks like this. Will be hard to Offset, Thicken, or Shell anything made with this sketch.
(Red outlining curves should be as close to matching the blue spline. At least smooth curved.)
What is optimum. 2 arcs with 2 lines.
Might help....
Thank you very much for your explanation and time. My ultimate goal is to design the Airbus 310 to make a model of it in 1/32 scale (3d Printing). So far, I have carefully watched 32 Tutorial videos (with an average time of 20 minutes) and took notes. And also 10 videos in the field of surface modeling (or sculpting)... But I encountered a challenge that unfortunately seems to have reached a dead end 😥. The issue is that there are shapes and angles in the nose part of the plane that are very challenging to design 🤕. All the videos I saw (the ones about airplane design) are limited to something like the image below :
However, in the real sample there are sharp edges and also certain curves
I really don't know how to implement them. Do you have any advice? I even checked Catia and Solidwork software. But the principles are the same. It is not without grace to mention that I have more than ten years of experience in the field of modeling (Ready-made kits, assemble, coloring and effects). Below are some of my works:
