Lofting with guides is kicking my butt

[Wayne949]

I know this is pretty common problem. I have looked at other posts and videos and I’m still not understanding what I am doing wrong.

I have imported some airfoils, they are all very similar, but have very small differences. I need to loft these using some guidlines to help define the correct shape of the wing (partial eclipse). I have managed to get the rear a couple of times, but the front has caused a fair amount of issues.

I have attached a sample. The curve at the rear is not connecting to the airfoil sketch, and I honestly don’t know why. Sometimes it works for me, sometimes it does not.

Please show me what the heck I am doing wrong. Many thanks!

Wing share2.shapr (6.3 MB)

[Xdrakosha]

The problem is here:

Endpoint of the arc is not connected to the profile. And it cant be connected because they don’t intersect at this point.

The solution is to add additional plane and draw arc on it.

3 point plane

We can see now pink points on the profiles.

And the arc is connecting easily tho them

The result:

[Xdrakosha]

Or if its appropriate you can modify profile itself