Just thought this was an interesting visual

Christopher Schimke

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_________________
"Sometimes you have to build a box to think outside of." - Bruce (not Springsteen)

*Custom wheel hardware for Audi/VW, Porsche and Mercedes wheels - Urethane Suspension Bushings*
T3Technique.com or contact me at [email protected]

Marco911 · Samba Member Joined: June 01, 2007 Posts: 4

tencentlife · Posted: Mon Oct 08, 2007 1:55 pm Post subject:

They must have painted out the massive eddy zone behind the box that continually sucks the thing backward.

Christopher Schimke · Posted: Mon Oct 08, 2007 3:00 pm Post subject:

Yeah, I thought the same thing. Interesting to look at anyway.

I would love to see a few T3 variations (stock Gl, Stock Carat, lowered Carat and a Westy) in a modern wind tunnel.

Anyone friends with a NASCAR team owner?
_________________
"Sometimes you have to build a box to think outside of." - Bruce (not Springsteen)

*Custom wheel hardware for Audi/VW, Porsche and Mercedes wheels - Urethane Suspension Bushings*
T3Technique.com or contact me at [email protected]

levi · Posted: Mon Oct 08, 2007 3:15 pm Post subject:

So, it says that the standard pop-top westy has the most drag, and the one with the least drag is.... the dehler profi. That makes sense to me. The one that doesn't figure is the lt28 (kinda like the lt28 anyway)
_________________
One of these days I'm gonna settle down,
but till I do I won't be hangin round.
Going down that long lonesome highway,
gonna see life my way

https://youtu.be/cSrL0BXsO40

Van-go108 · Posted: Mon Oct 08, 2007 3:37 pm Post subject:

That camper's a dog. Laughing

Look at that lack of air flow.
_________________
"Okay, so there's 6 beers and 5 of us. You know what this means don't you? 4 of you are going to have to leave."

1973 Thing
1957 Continental Mark II Click to view image

syncrodoka · Posted: Mon Oct 08, 2007 4:20 pm Post subject:

LT28? I see a camper on a vanagon singlecab. Similar to a Karmann Gypsy- man those things have got to be FAST Laughing

http://www.vwcampercrazy.co.uk/search_detail.asp?CamperID=1084&AdvertiserID=1611

Cartesiandemon · Samba Member Joined: June 08, 2006 Posts: 18

As to the sucking eddy... (sorry if anyone's named eddy)
I have a Country home camper, and they claim that a very slight spoiler on the back end really improves aerodynamics. Overall, it's a nice design for a poptop, and there's room in the front for a sunroof.

jkeller · Posted: Wed Oct 10, 2007 9:00 am Post subject:

Does anyone else think that filling in the luggage rack - covering it over smooth and level with the rest of the poptop - would improve the aero?

It seems like the perfect place to get a swirl as the air pushes over the top of the windshield...
_________________
1985 Weekender, Auto Trans.

tencentlife · Posted: Wed Oct 10, 2007 10:27 am Post subject:

It might help a little bit, but that's like painting the barn when the frame is rotten. It'll make you feel better, but there's not much point in it.

If you want a box to be more aerodynamic, you would have to attach a cone to the back end. Large frontal area needs a lot of power to displace air, and can increase how much wind-buffeting you experience, but the majority of the actual drag is the result of having to pull a huge low-pressure zone around behind you. If Eddy was a Conehead, we'd all get 28mpg.
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Shop for unique and useful Vanagon accessories at the Vanistan shop:
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also available at VanCafe.com!

Please don't PM here, I will not reply.

Experience is death to doctrine.

levi · Posted: Wed Oct 10, 2007 11:50 am Post subject:

Words of wisdom there. There's a guy on the subyvan group that made up a bustle for the rear end. Huge difference in mpg. Unfortunately, it's ugly as sin. If you really want to save on mpg, just drive a little slower. Wink

The gas consumption difference between 55 and 70 is ridiculous.
_________________
One of these days I'm gonna settle down,
but till I do I won't be hangin round.
Going down that long lonesome highway,
gonna see life my way

https://youtu.be/cSrL0BXsO40

jashv · Posted: Wed Oct 10, 2007 12:24 pm Post subject:

?Waldo? · Posted: Wed Oct 10, 2007 12:53 pm Post subject:

When I am doing my next projects on my TD camper, I will be cutting out the rear of the engine bay around where the license plate door is all the way to the taillights on either side. The entire area will get the extruded steel mesh for a grate. The engine will be enclosed by the stock diesel diaper and perhaps sealed a little better. The intercooler will be on the left of the engine bay, the oil cooler on the right. Both will have skirting so that the air coming down the stock air scoop will need to pass through them. The extra area cut out from the back will theoretically allow that negative pressure into the engine bay and so assist airflow through both coolers and simultaneously reduce the "sucking eddy" a little. The VNT Mercedes 300TDT needs completing first:

http://vwdiesel.net/phpBB/viewtopic.php?t=10365

and then the TD Vanagon is at the TOP OF THE PROJECT LIST! Very Happy

Andrew

tencentlife · Posted: Wed Oct 10, 2007 1:02 pm Post subject:

jkeller · Posted: Wed Oct 10, 2007 2:15 pm Post subject:

Hey, it was just an idea. I never use the luggage rack anyway.

75?! Laughing

The only time I see 75 is going down a long steep hill.

I generally try to stay between 55-60, even on the freeway.
_________________
1985 Weekender, Auto Trans.

tencentlife · Posted: Wed Oct 10, 2007 2:50 pm Post subject:

I'm not running the same engine as you, although even the stock 2.1 was able to go 90+ on flat ground, and at 7000' altitude to boot. Just a 7-pass, though, I'm not hauling the extra weight of a Westy. But I'm still wrassling with pretty much the same aerodynamic limitations.
_________________
Shop for unique and useful Vanagon accessories at the Vanistan shop:
https://intrepidoverland.com/vanistan/
also available at VanCafe.com!

Please don't PM here, I will not reply.

Experience is death to doctrine.


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