How to create a 3d Shape from Curves ( Loft?)

[NiceNico]

Hi everbody,

I'm trying to model the following and can't get any further.

It is the blade of a Whopper Plopper lure. In Rhino I would loft it using several 3D curves, but in F360 I just can't get any further. Thats my progress so far:

Any advice would be appreciated.

Thanks everybody for their help.

File is attached.

Best,

Nico

[Drewpan]

Hi,

It is possible to create 3d sketches in fusion. They are not used often but people

do use them. I am currently doing a project where I required complex 3D curves

but I couldn't get anything accurate enough using 3D curves. The method that I

am using is very crude and may not be the best way but it does work and it creates

very accurate shapes.

My Project is a Ducted Fan that rotates at 20,000rpm. At those speeds the airfoil

shape of the blade is critical. The method that I use is this.

I start by creating a Front View Sketch of what the 3D curve looks like. This is the

Leading Edge of my fan blade.

Then I do the same with a Side View.

I do the same for the Trailing Edge.

I then change to Surface Mode and extrude these lines into Surfaces.

I then use the Thicken command and turn these surfaces into Bodies.

From here I do a Combine Intersect operation that creates the portion

of these bodies that intersect with each other.

Now I have two 3D shapes that I can use as Rails for a Loft.

The end result is a Blade with complex curves.

As I said, very crude - but it works.

The trick is to make the thickness of the surfaces thick enough to get

a usable rail. The Rail is the edge of the Body you just created. Lining

up the profiles to Loft is a little bit of a fiddle but you get it by zooming

right up close then click and drag if necessary.

Cheers

Andrew

[laughingcreek]

---

@Drewpan wrote:...I then use the Thicken command and turn these surfaces into Bodies.

...

---

Drew-I'm still at a loss as to why you thicken the surfaces.  it's an extra step that increases the possibility of selecting the wrong edge for the rail/profile.  just trim the surface and use the resulting edge.

[Drewpan]

Hi @laughingcreek 

For whatever reason I cannot get it to work that way. I do it this way because

I can then just select the edge of the resulting body and use this as a rail. It

works for me.

Cheers

Andrew

[laughingcreek]

Nico-thought i'd take a stab at this over my morning coffee.  attached is a possible approach you could try.  let me know if you have questions-

[NiceNico]

Hi and thank you both @Drewpan  and @laughingcreek,

I thought modelling this would be similar to what I would do in Rhino- similar to what @Drewpan  did.

Somehow I had the impression that there is probably another way in Fusion and that's why I wanted to post the whole thing.
Thank you @laughingcreek for your interesting solution suggestion, which I would definitely never have thought of on my own.

I will try to remodel both for practice.

Thank you again and best regards,

Nico