Easy Reversible Bumpers with CAD

[GeeTwo]

Originally Posted by Ari423

We tried this in 2014, and we were pleasantly surprised with how easy they were. The only thing we had trouble with was the corners. They never laid right, no matter what we tried. How did you deal with the corners on yours?

I did a 3-d breakdown of what this profile should look like a few weeks ago. I've posted an image to CD-media, and will link when it's up. I based this on a single-colored bumper, but it should not be difficult to extend to reversible bumpers.

Here's a text description: From a center fold line, start your sewing line 2-1/2" past the end of the corner of the wood on the bumpers. Go perpendicular to the fold for 1-1/4", then follow a shape equal to 1-1/4" times a sine wave (from 90 to 180 degrees) for 90 degrees. Continue tracking at 45 degrees for another 1-1/4" away from the fold; this should end up even with the end of the wood. From the sewing curve just drawn, add a 1/4" seam allowance. Continue the cut along the 45 degree sew line for another 3/4" of wood thickness, then turn directly away from the fold for enough to put staples in the back side of the wood.

Edit: Here's the pattern of the cloth for the bumpers.