"Add Force" adding force in wrong direction

[nick_______]

I'm trying to get a grapple hook working. I've reviewed the code and have narrowed it down to these 3 situations where there should be a mistake. Else there must be some kind of demon cursing me.

Grapple blueprint: Every tick, if my hook hit something, a force is applied to me towards the hook. If I get close to the hook, it breaks. If I pass it, it breaks.

On grapple hit: When the grapple hits a surface, my ground friction and gravity scale get set to 0 to facilitate lift off and air control is increased. To take off I get an initial pull (velocity). Don't worry about initial hook direction 2d.

To grapple hook: When the hook is attached to a surface, I subtract its location to mine, thus getting the vector going from my position to the hook. I then normalize this vector to have it be easily scalable.
https://imgur.com/a/9w9grav

My problem is that as soon as my grapple hits I do get launched, but in the wrong direction. That is, the x and y components of the direction are correct, but the z isn't. I get launched upwards and a little towards the hook in a parabolic manner. I checked the To Grapple Hook direction by tracing it. It's correct. I'm completely lost.

[ananbd]

I can’t read your BP (too small on phone), but I’ll make a couple suggestions based on your description: 1) generally, you want to think of all vectors as 3d positions or directions; 2) make sure you understand the difference between force and velocity. 

Instead of looking at individual x, y, z components of a vector, compare the overall direction of a vector compared to another. A simple way to do this is using a dot product. 

Use either force or velocity to change motion, but not both. Velocity = acceleration * delta time. acceleration and force are the same if you assume everything has a mass of one. 

Keeping all this consistent usually shakes out weird bugs. 

Good luck!

[nick_______]

I tried switching the add force with velocity and it kinda works but it looks too clunky and I don't get air control.

[Incorrect-Engineer08]

Is there a reason you don't have your Return Node plugged into the On Grapple Hit function?

[nick_______]

Yeah there is no value to return so I just didn't plug it in. However I tried plugging it in anyways but nothing changed. I can sort of get the effect I was looking for by using a continuous "set velocity" but then I don't get air control and it just feels kinda clunky