View Single Post
Old 05-28-2012, 06:18 PM   #1 (permalink)
hotrodf1
EcoModding Lurker
 
Join Date: May 2012
Location: Evansville, IN
Posts: 13

Brutus - '01 Dodge Cummins 3500 Dually extended cab
Thanks: 5
Thanked 0 Times in 0 Posts
enclosed trailer aero kammback

Hey all
been reading about the "pot of gold" that's lurking at the back of the trailer.
Been getting about 13mpg on average towing my racing trailer. I'm shooting for 16 for now.

Read on wiki that a reduction of area about 50 Percentgets close to the efficiency of a full boat tail. So i've started with 96 wide by about 85 high. Tail should then be about 68 x 60 I believe.

Using a 15 degree slope the length of the addition ends up around 44 on the angled part. Does that seem reasonable?

Building a frame from 3/4 conduit and bending and welding as needed. I plan to skin with some plastic sheet I can get at work. Heavier than coroplast but very available and very free. Probably just rivet it on.

I've attached a couple pics of back of trailer and start of frame. Thinking the pieces that connect the two will have several small bends to get closer to teardrop shape.

Anyone have any feedback on this. Would like to build once and be done.

The whole deal will be hinged on topside to get it out of the way to unload the racecar.

  Reply With Quote