 Today
|
|
|
|
Other popular topics in this forum...
|
|
|
|
11-19-2014, 07:46 AM
|
#2 (permalink)
|
|
Master EcoModder
Join Date: Sep 2009
Posts: 5,927
Thanks: 877
Thanked 2,024 Times in 1,304 Posts
|
looks like MB fudged their aero claim for the CLA.
regards
mech
|
|
|
|
|
11-19-2014, 08:04 AM
|
#3 (permalink)
|
|
Moderator
Join Date: Feb 2012
Location: Urbana, IL
Posts: 1,937
Thanks: 199
Thanked 1,802 Times in 939 Posts
|
Quote:
Originally Posted by Old Mechanic
looks like MB fudged their aero claim for the CLA.
regards
mech
|
The lowest-spec version we get in America is the CLA 250, for which Mercedes claims Cd .28. |
|
|
|
|
11-19-2014, 09:12 AM
|
#4 (permalink)
|
|
Master EcoModder
Join Date: Sep 2009
Posts: 5,927
Thanks: 877
Thanked 2,024 Times in 1,304 Posts
|
They claculated the MB at .30 and the Leaf at .32. With the attention to aero improvements MB has been advertising and claiming, I wonder how much the consumption of the Leaf would decrease if the cd was .25. It is, after all, a short distance commuter vehicle with average speeds probably around 25 MPH or even less depending of traffic density of individual commutes.
regards
mech
|
|
|
|
|
11-19-2014, 12:35 PM
|
#5 (permalink)
|
|
Master EcoModder
Join Date: May 2008
Location: Maynard, MA Eaarth
Posts: 7,907
Thanks: 3,475
Thanked 2,950 Times in 1,844 Posts
|
The Leaf gets driven at speeds just like any other car. It is a daily driver car - and it goes just as fast as any other daily driver commuting car. If the Leaf had a Cd of 0.25, it would have a beneficial effect, just like any other car.
|
|
|
|
|
The Following User Says Thank You to NeilBlanchard For This Useful Post:
|
|
|
11-19-2014, 02:35 PM
|
#6 (permalink)
|
|
Master EcoModder
Join Date: Aug 2011
Location: Warren, MI
Posts: 2,456
Thanks: 782
Thanked 668 Times in 410 Posts
|
Video doesn't work on the C&D website
__________________
He gave me a dollar. A blood-soaked dollar.
I cannot get the spot out but it's okay; It still works in the store
|
|
|
|
|
The Following 2 Users Say Thank You to Sven7 For This Useful Post:
|
|
|
01-23-2015, 04:58 PM
|
#7 (permalink)
|
|
Ultimate Fail
Join Date: Feb 2008
Location: Austin,Texas
Posts: 3,585
Thanks: 2,872
Thanked 1,121 Times in 679 Posts
|
I e-mailed the A2 tunnel regarding the .30 cD on the 1st Gen. Insight, and go this response :
Quote :
I wasn't present for the test in question but I must assume the car would have been in new stock condition as implied by the article. There are a few things to keep in mind when questioning the Cd; all wind tunnels have some variation from one to the next but any decent wind tunnel should be fairly repeatable and reproducible to itself. Also manufacturers have been known to report "overly optimistic" data concerning the drag coefficient and gas mileage the latter most average consumers can attest to. This is why it is a good idea for groups like car and driver to conduct independent tests comparing multiple models concurrently at the same location. The data produced this way can be more reliable and more useful to the average consumer as the data is much more comparable between the models. I hope I have been able to give you some small degree of clarity on the article.
Geoffrey Eaker
Operations Manager
A2 Wind Tunnel
|
|
|
|
|
The Following User Says Thank You to Cd For This Useful Post:
|
|
|
01-23-2015, 06:04 PM
|
#8 (permalink)
|
|
...beats walking...
Join Date: Jul 2009
Location: .
Posts: 6,190
Thanks: 179
Thanked 1,525 Times in 1,126 Posts
|
Spoken to the 'birds-of-a-feather' jingle: "Test done together, yield (comparable) data together."
|
|
|
|
|
