Modelling a fin and rudder for a plane

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1

Of all the things in S3D, the ones I find most confusing are lofting and subtracting. I just don’t get the logic. I currently have a profile of a fin and rudder for my full-size plane. I also have the airfoil shape (I’m using half the shape, so I can join them later and get a perfect centre line). What I’m trying to do is to somehow intersect the two shapes leaving the fin/rudder with the airfoil shape.
Fin and rudder.step (170.3 KB)
Fin and rudder 2.step (170.4 KB)

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Hi mate,

Sorry I’m unfamiliar with aircraft lingo. Is this what you’re trying to achieve? If it is then I’d be happy to explain it further for you.

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May be help too:

Or:
https://www.instagram.com/tv/CkSiZhDtgP9/?utm_source=ig_web_copy_link&igsh=MzRlODBiNWFlZA==

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Hi. Nope - I did that and one ends up the the inverse of what is required. Basically I need to end up with the two pieces (fin/rudder( not simply square lofted, but with their plans cut out of the smooth airfoil shape.