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Old 07-11-2008, 10:53 AM   #1 (permalink)
MetroMPG
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Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,513

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

MPGiata - '90 Mazda Miata
90 day: 52.71 mpg (US)

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

Appliance car - '14 Mitsubishi Mirage ES (base)
90 day: 60.16 mpg (US)
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Video: clever, simple demo of teardrop shape -pointy end first vs. blunt end first

Says veteran motorcycle ecomodder Craig Vetter:

Quote:
I am always astonished to discover that most people simply do not understand what streamlining is.
When shown a teardrop shape, most people (including his brother) incorrectly assume it will slip through the air better going pointy end first.

To demonstrate the difference between "pointy end first" vs. "blunt end first", his brother made up a brilliantly simple demonstration using a shop vac exhaust, a clear tube (the wind tunnel) and a model teardrop car.

car:



"windtunnel":



He compares the amount of time it takes the car to be blown out the tube depending on which way the pointy end is facing.

From: Craig Vetter's site: What is streamlining (the Quicktime MOV video is linked at the bottom of that page)

Direct link to the movie (.mov) file: http://www.craigvetter.com/Movies/Streamlined_test.mov

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