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-   -   Kammback yields +4 mpg (https://ecomodder.com/forum/showthread.php/kammback-yields-4-mpg-9185.html)

gascort 07-11-2009 01:45 AM

Kammback yields +4 mpg
 
http://3.bp.blogspot.com/_2A3Fl4I3bz...Videos+009.jpg
I got 55 mpg highway with it versus 51 mpg without.
Full details and photos on my blog, note the awesome new EM decals!
Scientific Method meets Fuel Economy: Kammback

Christ 07-11-2009 01:58 AM

Not bad... not bad at all.

orange4boy 07-11-2009 02:25 AM

Nice looking bubble! I like your simple but effective fabrication.

You have an escort/pacer hybrid started.

I've been dying to do this for the egg but I'm too busy at the moment and can't justify it because I do so little highway driving.

Just play "Stand by Your Man" by Patsy Klein.

Living vicariously...

alohaspirit 07-11-2009 02:54 AM

two :thumbup::thumbup: up

Piwoslaw 07-11-2009 03:02 AM

Wow, that looks good, Gascort :)
Have you coastdown tested it yet? I wonder what the effect on Cd is?

The bubble sticks out so far behind the bumper that I'd advise you to put some red reflective tape on the back. Not everyone pays attention, unfortunately.

cfg83 07-11-2009 03:48 AM

gascort -

Fantastic job! How thick is the plexiglass? It seems "thin enough" to bend really well. Is it bending from the bolts or did you have to heat it?

CarloSW2

bondo 07-11-2009 08:42 AM

Cool!
 
Excellent fabrication gascort. Smart solution to reducing the turbulent wake of your car without losing rearward visibility or the functionality of the hatch.

Bondo

Daox 07-11-2009 09:42 AM

VERY nice! I love it. :D

McTimson 07-11-2009 11:23 AM

That looks awesome!

The way it's mounted reminds me of bicycle racks that strap onto the trunk - so maybe this could double as a bicycle rack. I would guess the 1/2" conduits probably aren't strong enough to support too much weight though.

gascort 07-11-2009 11:42 AM

Quote:

Originally Posted by Piwoslaw (Post 115045)
Wow, that looks good, Gascort :)
Have you coastdown tested it yet? I wonder what the effect on Cd is?
The bubble sticks out so far behind the bumper that I'd advise you to put some red reflective tape on the back. Not everyone pays attention, unfortunately.

Thanks!!
In part of my test route there is a huge hill. It's on my commute and my goal is to be able to EOC the whole way down without losing speed. :)
When I tested it yesterday, I coasted (on average) more than twice as far before dropping 5 mph than without. On one trial I tripled the length!
...
I do have reflectors/red LEDs planned. Good point!


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