How to array straight line along helix curve?
Here how to do a curve driven pattern
First of all you make a curve or a helix in this case..
Then you make a profile and extrude it..(or any other body or feature you want to pattern) I made a 3D sketch Extrude.
then I made a surface from the helix profile.. this will help to set up the normal to the Helix path
then under linear pattern in the command manager choose curve driven pattern
finally to set it up you pick in direction the curve in this case the helix, and under aligment method choose tangent to curve, then the face normal selection appears you choose the surface, and then set up the other items. You have to pick the bodies to pattern, because they wont merge at the end..
finally you get a curve driven body or feature (i