Quote:
Originally Posted by hotrodf1
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.
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with an 'ideal' boat tail nearly all the drag reduction has occurred by 80% of the length.Chopping it off at 50% would leave 26% of the drag on the table.
If you wanted to guarantee your job,you might want to search here at Ecomodder for 'Aerodynamic Streamlining Template Part-C'.this was intended for these kinds of projects.
Curves are your friend,angles will get you part way.
Edge curvature is also very important to a boat-tails performance.
I'll wait for your photos.