Combining bodies for incompressible

Hi all,

I am very new to CAD design and simulations, so please forgive me if this is a simple question.

I am creating a wing of an airplane in Onshape and importing into SimScale. The wing body is just an extrusion of a aerofoil design, and I have created a wing tip by creating a loft between a smaller version of that aerofoil and the original that was used in the extrusion. The smaller design sits above and to the right of the main one.

I am trying to add another wing tip on the bottom, and I have used the same methods as above, but when I try to union the models together it deletes the top wing tip. If I don’t try to union it, when I create my external flow volume, I can’t delete both bodies properly: it considers the wing and the top tip 1 body and the bottom tip as a separate body.

Any help would be much appreciated, please let me know if there is anything I need to clarify.

I think the project is public but I am not sure so let me know if it needs to be shared for you to view.

Thanks!

Solved by using the subtract boolean function to remove the intersecting area, isolating the bottom wing tip. From there the two bodies can simply be combined using boolean union.