MBenz B-Class .26 Cd" sleeker than bullet" with video
MBenz B-Class is "sleeker than a bullet" at .26, but is it just me or are the engineers just soaking up overtime ? I mean c'mon over 275,000 hours of computer modeling and 1100 hours of wind tunnel testing for a .26 Cd ???
It's no wonder people have the impression that the way that a car comes from the factory is the best it can get, and that to improve the aerodynamics on a car one must have a PHD and spend thousands of hours at it. "Mercedes says that over 275,000 hours of computer modeling and 1100 hours of wind tunnel testing were involved in making the B-Class so aerodynamic. Among the tricks used include a sealed front fascia (including special seals that prevent air leaking past the headlights), a large roof spoiler, special slots and spoilers around the wheel arches, a flat underbody panel, and adjustable radiator shutters that can open or close depending on how much cooling air the engine requires. Read more: Video Find: Mercedes-Benz B-Class Sleeker Than a Bullet? - WOT on Motor Trend " http://www.youtube.com/watch?v=yY_pH...layer_embedded |
" First car in the world with a 'Pagoda' roof "
Really ??? http://www.cartype.com/pics/3730/sma...prius_rear.jpg |
Hmmm... the guy in the Mercedes jacket also claims the B-class is "the most aerodynamically efficient car in the world" around 2:30. It looks like the frontal area might be slightly larger than a Prius III, which at Cd .25 would have lower total drag.
Edit: I'm right--the 2013 B-class is 70.3" wide and 61.3" high vs. the Prius' 68.7" width and 58.7" height. |
The Citroën AX is even better and was produced in... 1986.
Cd : 0,31 Frontal area : 1,74 m² (18,85 sq ft) CdA : 5,84 vs 6 for the Prius. |
Quote:
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claims
Perhaps their claim is a contextual remark based on a particular market segment of crossover SUVs based on length,height,width,and curb weight at the time of press release.
Certainly,all their effort was to chip away at a hard design and quit at some point at which time diminishing returns were devouring their budget. If we look at their market competition it would give a contrast to their remarks. The upshot is that Daimler-Benz thinks aerodynamics a market 'driver'.If so,that's a good thing,as the level of general consumer education may be dragged to new levels along with the hyperbole. |
A bullet has more acceleration and higher top speed.
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I have bullets with a Cd of around 1.5, I also have bullets with a Cd of greater than .4
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Exactly which bullet? Wadcutter?
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bullet
I don't have the table with me,but I believe the 'Aberdeen' type,boat-tailed projectiles are Cd 0.158 at sub-sonic velocities.
Hornady makes a real screamer in small caliber. The latest Barrett sniper round should have a low sub-sonic Cd as well. |
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