A couple old threads where we make mention of the car in question.
https://ecomodder.com/forum/showthre...tml#post517762
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Originally Posted by aerohead
Here's the Sierra variant
Here's a comparison with the XR4Ti
Ford claims Cd 0.32 with,0.34 without.
On a pickup you'd want some sort of tonneau cover for the flow to reattach to,as on a notchback car.This is how Chrysler can get it's Dodge RAM 1500 to Cd 0.36. |
Curbside Classic: 1986 Merkur XR4TI – What’s In A Name?
https://www.curbsideclassic.com/curb...ats-in-a-name/
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The rear bi-plane spoiler looked rather silly and was cut back to one tier by ’88.
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https://ecomodder.com/forum/showthre...-16550-16.html
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Originally Posted by kach22i
EDIT-1: I think this is related to the same general topic.
http://www.merkurencyclopedia.com/Me.../aerodyne.html
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In a nutshell, the information shared with me by the Ford aerodynamic office in Dearborn, (data from the FOG wind tunnel) indicates that there is no negative lift (down force) generated by the bi plane nor the single wing aero package. The bi plane wing is an adaption from Fords first aero research vehicle done in Germany in the mid 70's. It had the biplane wings and the look in the backlite and C pillars. The car also had active aero skirts and front spoilers...etc etc. very very advanced. The bi plane wing is designed purely for reduction of drag only. For its time the XR4 has extremly low drag numbers. .328 for production ride height bone stock car. With a frontal area of 21 sq feet (same as mustang) our cars are rather slippery. The engineers and stylists did an excellent job of working together for some good comprimises.
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Merkur XR4Ti biplane spoiler
http://www.curbsideclassic.com/curbs...ats-in-a-name/
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https://ecomodder.com/forum/showthre...tml#post517797
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Originally Posted by bentring
This article has an image of the Ford Sierra being tested.
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Aerodynamics was the keyword when developing the new family car. The engineers and designers worked hard to make the car more fuel efficient, better to drive and more cost-effective to produce. To achieve all this, Ford people in Cologne spent over 2.8 billion Deutsche Marks (approximately the same amount in dollars today) for the development of the Sierra. Searching for the most aerodynamic shape, Heinz Ostendorf and his team spent more than 75 days in the wind tunnel testing all the design ideas. People were working hard in the Daimler-Benz Windkanal in Stuttgart, as they were guests in the facility, and only the costs of renting it amounted to 1.2 million Deutsche Marks. Every idle minute spent there was like throwing money in the huge fans of the wind generator.
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__________________
George
Architect, Artist and Designer of Objects
2012 Infiniti G37X Coupe
1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft
You cannot sell aerodynamics in a can............
Last edited by kach22i; 03-28-2021 at 05:29 AM..
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