I am not sure to have understod your issue. I attached two examples to let you see my solution. I used a script I wrote few month ago. The article that describes the add-in can be found at the followinf link: http://forums.autodesk.com/t5/api-and-scripts/how-to-create-a-helix-3d-curve-using-fusion-python-by-.... But I think that the same solution can be obtained through projection of a coil.
I created an helix with an axis of 70 mm and a radius of 16 mm. For simplicity, I neglected the tilt of the helix. I created four construction planes along the path of the helix and on each plane i created a sketch in which I copied your profile.
In the first example the profiles on the sketch have the same tilt. In the second example I gave a tilt of 30, 60 and 90 degrees for each profile, respect the first.
I used the loft command to join the profiles and let the body follows the path of the helix.
In the second example I used multiple loft to join two profile at a time.
I hope tha this will help you.
Dino
