Quote:
Originally Posted by VWCw
finally found the image i was looking for (originally posted by MetoMPG):
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VWCw,if you compared the smoke filled wake behind the Golf-1 ( Rabbit ) and the 'Aerodynamic Streamlining Template Part-C' working diagram you'd see a resemblance between the two.
The smoke is basically telling you how the body should be formed.
The 14-inch spoiler you mentioned is probably an attempt to get the body to reach back far enough to intersect the 'Template' curve.
Any length is beneficial.For an insight into what the rear modifications can do,please check out "BOAT TAIL Drag Reduction Estimates".
You can use the SEARCH EcoModder.com or find it back on page 6 here at the aero forum.
VW has done a really good job with the Jetta but any significant drag reductions are going to have to come from reducing the wake.