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Old 10-29-2019, 09:57 PM   #11 (permalink)
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Or go with a homebuilt version of the boxtails that 18 wheelers have been using for years.


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Old 10-30-2019, 03:02 PM   #12 (permalink)
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Overall I think there is a consensus of concentrating efforts on the tail, not the nose.

Causes of aerodynamic drag
https://www.sciencelearn.org.nz/reso...rodynamic-drag

Quote:
Pressure drag

Pressure drag is caused by the air particles being more compressed (pushed together) on the front-facing surfaces and more spaced out on the back surfaces. This is caused when the layers of air separate away from the surface and begin to swirl – this is called turbulent flow. Note how the wing shape reduces this.
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Old 10-30-2019, 05:43 PM   #13 (permalink)
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Ovoid forms aren't pertinent to the rectilinear construction. Follow Mair or Ahmed


ecomodder.com/forum/.../random-aerodynamic-oddity-day-thread...#post610679
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Old 10-31-2019, 08:41 AM   #14 (permalink)
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Typical trailer aero considerations would be having a radius at the leading edges of the box, not sharp corners. A V nose may reduce the need for this, but I would be inclined to curve the front edges to some extent.

I would recommend you create a rear door that was a several feet deep boat tail, hinged to one side. That gives you the taper, but the door opening would still be 100% of the width, as only the section past the door opening would be tapered. Think of the typical trailer tail, except as an enclosed door. Then either continue to use the ramps that you would use now, or build/buy removable ramps.
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Old 10-31-2019, 01:38 PM   #15 (permalink)
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I couldn't find it, but in this site (else my imagination) there was a post about a full height box trailer with a clamshell boat tail.
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Old 10-31-2019, 01:55 PM   #16 (permalink)
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Quote:
Originally Posted by freebeard View Post
I couldn't find it, but in this site (else my imagination) there was a post about a full height box trailer with a clamshell boat tail.
The one I'm thinking of was an RV way back in 2011.

https://ecomodder.com/forum/showthre...d-e-18151.html


Not a tractor trailer style baffle box cavity, but similar results I assume.

First found it here while doing a search:
https://www.buildagreenrv.com/new-ideas/
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Old 10-31-2019, 01:57 PM   #17 (permalink)
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Quote:
Originally Posted by freebeard View Post
Ovoid forms aren't pertinent to the rectilinear construction. Follow Mair or Ahmed

ecomodder.com/forum/.../random-aerodynamic-oddity-day-thread...#post610679
Yea, I posted several images in that other thread with this thread in mind. Wasn't quite sure how to introduce or implement it here without scaring people off.

Too much information and all that.
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1998 Chevy S-10 Pick-Up truck
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Chin Spoiler:
http://forums.pelicanparts.com/off-t...effective.html

Rear Spoiler Pick Up Truck
http://forums.pelicanparts.com/off-t...xperiment.html

Roof Wing
http://ecomodder.com/forum/showthrea...1-a-19525.html
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Old 10-31-2019, 01:59 PM   #18 (permalink)
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Quote:
Originally Posted by aardvarcus View Post
Typical trailer aero considerations would be ...........
Good post.
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George
Architect, Artist and Designer of Objects

1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft

Chin Spoiler:
http://forums.pelicanparts.com/off-t...effective.html

Rear Spoiler Pick Up Truck
http://forums.pelicanparts.com/off-t...xperiment.html

Roof Wing
http://ecomodder.com/forum/showthrea...1-a-19525.html
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Old 11-01-2019, 01:02 PM   #19 (permalink)
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Quote:
Originally Posted by freebeard View Post
I couldn't find it, but in this site (else my imagination) there was a post about a full height box trailer with a clamshell boat tail.

https://ecomodder.com/forum/showthre...tml#post436708

Photobucket has eaten the images a bit. But I think this would be the trailer you were thinking of. I never heard any more about it at the website I saw it at. Maybe I'll ask there. Ought to either have a few miles, or a lot dust on it, by now.
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Old 11-01-2019, 01:31 PM   #20 (permalink)
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Thanks. That's the one. Photobucketsucks.

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