Preview of my next mod: The most visually striking yet!
It made it about 20 miles in the rain today before I watched the reinforcement fall off. It definitely needs better reinforcement all around to cope with freeway speeds. It's made of two layers of coroplast, with steel strapping. Unfortunately I only glued them on, but it doesn't matter, since it clearly needs more stability anyway. I'm going to try a layer of hardboard under it.
Because of the rain, I definitely won't be setting any records this week. My morning commute said 26 mpg, with a much more accurate calibration. So not much help for testing aero performance.
The angle is 10 degrees and is set slightly shallow of the ideal curve from the roofline. The arch passes 10 inches above the tailgate at the highest point. Rear visibility is minimally impacted, because the perspective of the rearview mirror is similar to the roofline. I'll post pix later when there is decent lighting. It does happen annoyingly that what little rear vision it does impact, it slightly obscures cars following at the proper highway following-distance. But I it doesn't completely hide them, and I can confirm by adjusting my glance a tad.
Once I get this thing stabilized, I also have the templates ready for clear "Kab-Kamm" which I hope to have ready this week, provided a few moments of dryness for the adhesives to stick.
