Here's a blender model that will allow you to array a chain in however shape and size that you like. Easily modify the curve that it's attached to, and it will follow it. Choose the bead count in modifiers to adjust it so that it covers as much of the curve path as you would like. You can also edit the curve's point mean tilt to change the rotation on each section or change all. To modify the size you can edit the base mesh. It will adapt smoothly to any object that you want - Create knots, waves and everything you would like!