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Old 07-03-2008, 04:42 PM   This thread is in the EcoModder Project Library | #1 (permalink)
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Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,898

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 53.56 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 61.98 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 58.72 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 57.23 mpg (US)
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Project: making a permanent Metro Kammback extension

I've started on version 2 - the permanent version of my earlier, cruder, Kardboard Kammback:

See: Kardboard Kammback: testing a partial boat tail prototype

Following in ebacherville's footsteps, and encouraged by a conversation with Phil, I'm going to try foam core construction, based on a cardboard mockup/base.

The mockup will be tuft tested first, to make sure it works. The main difference from version 1.0 will be generously radiused "shoulders" in the transition from the roof to the side of the car - to ensure more gradual pressure recovery and discourage vortex formation.

Here's where I'm at so far:

(forming compound curves is harder in cardboard than it will be in foam!)

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Latest mods: 3-cylinder Mitsubishi Mirage. EcoMods now in progress...
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has launched a forum for the efficient new Mitsubishi Mirage - fuel efficiency info for Geo Metro owners - electric car conversion on a beer budget
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