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Old 11-14-2019, 09:33 PM   #32 (permalink)
Hersbird
Master EcoModder
 
Join Date: Feb 2014
Location: Missoula, MT
Posts: 2,097

Dark Egg - '12 VW Touareg TDI Sport AWD
90 day: 25.81 mpg (US)
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Quote:
Originally Posted by freebeard View Post


This one is in my Photoshops album. Rather than an inflatable, a virtual bubble. I learned this from you years ago, showed Hersbird this pic, and he implemented on his Hi-Lo. I forget his results.
Well I don't know if it worked but it looked dang cool! Seriously that trailer did get really good MPG but I didn't have a lot of before testing and did everything at once so I didn't know if any one thing helped more than others, or if it just did good the way it came from the factory. I could get over 15 mpg towing with a rig I seldom got better than 17 mpg not towing.

I'm now back in the idea of planning a ground up build again now that I have the TDI and the tongue weight on my big camper is really over the hitch rating although the overall weight is within the tow rating. I could probably ditch 1 of 2 propane tanks and switch in Li-ion batteries and move them inside and get it under the 615 pound limit. That wouldn't get me that sweet 15 mpg again though, and I think I can beat 20 mpg with a ground up build.



see how it faced the air in relation to the tow rig.


also notice the factory trailer is "shark nosed". I don't know if that helped in any way either but as the back of the Aspen sloped in a parallel manner I can't imagine it hurt.
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