Areodynamics
#1
Areodynamics
Ok the windshield is raked at a much more dramatic angle than either my '97 Thunderbird or my '69 Dodge Charger, now that's AREO. Next the air flow goes up over the slick windshield seal over the smoooth sunroof and down the back crossing the back-lite as smooth as can be. But wait! now where does it go? Into the trunk ? There's a BIG gaping hole between the back-lite and the trunk lid. So the air goes into the trunk ?
#3
no
of course it's not, but there's still a question, where does the airflow go ? Seems like it would make more sense to send it OVER the trunk. Begs the question, what's the rear spoiler / wing doing back there?
Last edited by Bigiron383; 10-20-2014 at 08:18 PM.
#8
I can't answer your first question as I am not a Nissan engineer. The answer to your second question is the air flow follows the open channel around the trunk periphery and exits just above the tail lights. It's the same path the water takes coming off the rear window.
#9
The designers must consider the potential of snow and ice. If they make the gap at the rear window to trunk too tight, when the trunk is opened and snow slides off the lid, it will fill the gap. Close that lid now and the snow is compressed, if it's ice already = you bend the lid or crack the rear window b/c ice doesn't compress.
The air flow over the rear window is mostly laminar, not much goes into the gap.
The air flow over the rear window is mostly laminar, not much goes into the gap.
#11
Hahah ^^^ well I guess they should have called you and asked before they finished the design of the Max eh? lol I'm glad I've finally found who's responsible for all of the decision making in the world. Nice to meet you Bigiron lmao... I'm just kidding though. Kinda...
#13
This can be figured out with a camera and some yarn:
https://www.youtube.com/watch?v=J4H13er58Lw
It has to be as Richard66 says because if not we would be taking a performance/mpg hit for a silly design.
https://www.youtube.com/watch?v=J4H13er58Lw
It has to be as Richard66 says because if not we would be taking a performance/mpg hit for a silly design.
#14
Hahah ^^^ well I guess they should have called you and asked before they finished the design of the Max eh? lol I'm glad I've finally found who's responsible for all of the decision making in the world. Nice to meet you Bigiron lmao... I'm just kidding though. Kinda...
Last edited by Bigiron383; 10-27-2014 at 06:59 PM.
#24
If I had to wager after watching aerodynamics testing videos, the problem is in the way you perceive airflow versus the way air actually flows.
The air doesn't curve down over the rear glass and along the body panels. In other words, the air doesn't stick to the body, it flows over it and is redirected. Essentially, the air flows over the roof and gently sinks down, missing that part of the car completely.
Watch the following video. Around 1:15, you can see what I'm talking about.
http://youtu.be/5LQHDkGHHK8
By the way, sweet Charger.
The air doesn't curve down over the rear glass and along the body panels. In other words, the air doesn't stick to the body, it flows over it and is redirected. Essentially, the air flows over the roof and gently sinks down, missing that part of the car completely.
Watch the following video. Around 1:15, you can see what I'm talking about.
http://youtu.be/5LQHDkGHHK8
By the way, sweet Charger.
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