Freebeard; Clearly this is a work in progress and my first attempt. Unfortunately I didn't not take pictures of the truck caps before dismantling them into usable pieces. I used the front and rear portions of the cap for the top and bottom. If I recall correctly one factory cap height was 42". All material used so far is 1" aluminum square tubing not angle stock.
Thank you for the picture you posted, I have seen it many times. That picture and Orbywan's thread on the AeroRV lead me here.
I have added so curved bows to the top section thou the curvature still isn't as much as your picture. Correct me if I'm wrong but haven't Class 8 trucks seen decent returns on their very linear designed tail.
My thoughts for the final tail/box cavity design is for it to have a 2" receiver mount that will slide into a hitch mount in a custom 4" tube bumper/air storage tank. The tail would suspended from a rack inside that would haul coolers and what not. I understand that sacrifices to a perfect design will have to made in order to have the tail easily removable for the hunting portion of the van's duty.
My assumption is that a fair attempt is better than no attempt. I realize it's not perfect but I'm having fun and I believe all Ecomodders have the same goal; Try to burn less fuel. I look forward to further discussions and feedback.
Thanks, Jonathan