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Old 12-01-2009, 10:49 PM   #176 (permalink)
MetroMPG
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Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,530

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

MPGiata - '90 Mazda Miata
90 day: 54.46 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)

Appliance car Mirage - '14 Mitsubishi Mirage ES (base)
90 day: 62.14 mpg (US)
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Quote:
Originally Posted by Cd View Post
Oh wait ... I didn't think about the frame under the cardboard.
I guess you couldn't just cut an adjustable section out could you ?
It's not really a simple change. I'd have to revise the internal bulkheads too. Also, getting curvature into the top would require bending the top aluminum tubes. Willing to do that.



Quote:
Originally Posted by Frank Lee View Post
Right or wrong, I'd increase tapers until I see sign of turbulence, than increase until "laminar". Otherwise you may just end up with extra unneeded length. With unneeded length comes extra unwanted skin drag as noted in recent discussions re: crx and del sol tails.
I have no problem admitting that the design isn't optimal. I'm inclined to revise once more, this time tapering/curving more aggressively toward the end. Average the results of v.1 and v.2 if I see separation, keep v.2 if I don't.

As you see it now, I've got maybe 12 hours in it. It's a lot of work! It's also fun, but not in the recent temps when the fingers start to get icy.

OH, and I'll have to go buy another roll of the good, sticky $5 duct tape. Used 1.5 rolls already. This is getting expensive!

Oh wait... I just realized I know where I may be able to use a heated shop. That would drastically increase my modding season. Will report back.
__________________
Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage.
Ecodriving test: Manual vs. automatic transmission MPG showdown



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
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