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Old 10-02-2017, 08:35 PM   #20 (permalink)
RAV4 EV
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Join Date: Nov 2016
Location: Los Angeles
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Quote:
Originally Posted by freebeard View Post
http://ecomodder.com/forum/showthrea...tml#post118447

The instruction is ground-plane to ground-plane, top of vehicle to top of template.
I think when I tried to do ground with ground and top with top I got the first image at the start of the thread, and that didn't seem to work . Unless I am missing something in which case I apologize!

Quote:
Originally Posted by freebeard View Post
I wouldn't over-think it. Have you looked at the fore-aft profile of The Template?
I'm not entirely sure I'm so new to aero moding that even that makes me confused lol.

Quote:
Originally Posted by freebeard View Post
At any usable truncation, the best you can do is produce the existing contour rearward and inward with a boxed cavity or concave bulkhead. I would limit vehicle length to 18 1/2ft based on the length of a parking space.
That sounds great, but it also is much more difficult to do . Others had suggested just tapering off the boat tail quicker which would be easier but much less ideal I'd guess?

The chevrolet express I used to own was 224.1÷12=18.675 Feet long, and I could park it just about anywhere so your suggestion on length is spot on.

Quote:
Originally Posted by freebeard View Post
There are examples of hitch mounts on Ecomodder. Leaving a gap between the box and car body is similar to the separate bed on a pickup truck — a drag inducing feature. It might be better to use a non-reciever hitch and gain additional attachment points at the old taillight locations.
I was really hoping to get a smooth transition of the boat tail from the end of the rav4 onto the boat tail body. I will have to think about how to tackle this. I really would like to have some reliable storage space in the back. My Rav4 EV is usually pretty loaded. If I could load about 3 good sized boxes in the back I would be quite happy. Though I feel like I'd need for the storage are to reliably hold up to 100 pounds. Not sure if I could design that right which makes the cargo carrier interesting. There is an aluminum one in harbor freight that weighs 30lb. Doesn't seem too heavy?

Anyway, since I am so confused on which template out of the 2 I linked earlier is right I settled to check the dimensions on the 1st which has the longer boat tail.

Pixel Check:

65 390 front bumper
635 390 rear bumper

570 pixel difference

rav4 ev is 180" long

570÷180=3.166666667 (1" equals about 3.166666667 Pixels)

Boat Tail Length?:

635 395 tip of rear bumper
980 395 tip of boat tail

345 Pixel Difference

345÷3.166666667=108.94736841"Inches/12"=9.078947368 feet long boat tail

9.078947368−20% (Fluid Tail Reduction)=7.263157894 Feet long Boat tail 80% of full size.

And if I want to stay within your suggest length, which is about the length of a Chevrolet Express non-extended:

7.263157894÷2=3.631578947
180(rav4 length)/12"=15(Feet)+3.631578947=18.631578947 Total Feet

So I would have to cut the boat tail in half and design a slide out cone tail thing of sorts I can deploy before going into the highway. Half version for city driving and 80% of full boat tail for highway.
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