can anyone explain what the point was behind the "snow plow" was? i see similar designs on many of the rectangular 80s GT cars, but never do i see somthing like this on newer cars. Also, why on the rear fenders do they leave it open? i understand the front, blocking off the front tires to lower turbulence, but why would you leave the rear tire exposed? wouldnt this create a large amount of drag? finally, why are there 2 airfoils on the rear? wouldnt you just increase the size of 1 of them if you needed more downforce?

 

How about for downforce for the nose? The rear fenders could be open for rear brake cooling or rear oil coolers, etc. Two wings could occur because there could be a spec wing, a need to keep the lower one to maintain a factory similar bodyline but still get downforce, etc. Without knowing what rule book the car was built to, it is all just a guess. That body Silvia comes from the mid-'80s so the rules, prep and general use of aero may be different from today. Looks like a lot of effort was made to make the car the way it was so there was probably a pretty decent reason behind it other than just bling.

Or maybe it was just bling and he had a little tiny dick and needed a way to impress the bitches.

BTW, don't you mean Aero instead of Fluid dynamics or any you talking about racing in the rain?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CRX Lee &raquo;</TD></TR><TR><TD CLASS="quote">Or maybe it was just bling and he had a little tiny dick and needed a way to impress the bitches.</TD></TR></TABLE>
I'm putting my vote on "impressing the bitches"

Christian, who now that he's married realizes how easy it woulda been to impress young import hizzos if he had only had more bling...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CRX Lee &raquo;</TD></TR><TR><TD CLASS="quote">

BTW, don't you mean Aero instead of Fluid dynamics or any you talking about racing in the rain?</TD></TR></TABLE>

air is a fluid, aerodynamics is an area of study in fluid dynamics

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NegativeLift &raquo;</TD></TR><TR><TD CLASS="quote">air is a fluid</TD></TR></TABLE>

rear fenders open = rear brake/tire cooling.

BMW example.. 'batmobile'
not JDeM but with dual rear airfoils..
http://files.conceptcarz.com/i...5.jpg

and large front splitter.
http://files.conceptcarz.com/i...1.jpg

:Blort:

 

well yea the bmw has a large front dam, but it is not anything like the one in the nissan pic? is there any specific reason that they make it jutt out all crazy like? thats what i was trying to figure out.

thanks for the feedback guys!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Buttcrack &raquo;</TD></TR><TR><TD CLASS="quote">well yea the bmw has a large front dam, but it is not anything like the one in the nissan pic? is there any specific reason that they make it jutt out all crazy like? thats what i was trying to figure out.

thanks for the feedback guys!</TD></TR></TABLE>

As far as the size.. I'd assume the more surface area the more downforce.. but then it would also contribute to drag. Also it appears they had to make it wider to cover up the larger front tires.

the reason it "jutts out all crazy like" most likely has to do w/the angle of attack.

..Then again this car is from the 80's... They wore "hammer pantz" then

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NegativeLift &raquo;</TD></TR><TR><TD CLASS="quote">

air is a fluid, aerodynamics is an area of study in fluid dynamics</TD></TR></TABLE>

I thought Lee would know this

still the shock guru

 

I'm thinking the car has about a billion horsepower and needs all the downforce they could find. Did you notice the air fences on the front fenders and even on the 'A' pillars for the windshield

 

My theory on the two wings: You're still going to have separation from the flow going off the rear end (under the wing). It reduces the velocity (speed and direction) change of the air as it recombines with the air coming from under the car and above the wing.

My theory on the front dam/wing: Same idea as a tradtional air dam, but with less drag since it isn't vertical like a airdam our cars usually use (which is pretty much a flat plate). I'm thinking it's kind of a combined airdam/splitter. Attack angle is small to prevent stall.

My theory on the open rear wheels: cooling. Either oil coolers or brakes/tire, or both since the air is hopefully moving quickly through both. It's possible for the air to be ducted over the tires after passing through some coolers, maybe with a brake duct in there?

My theory on the car: not made in a wind tunnel. It looks like a pretty basic execution, maybe due to rules or girls. I vote girls.

 

not that this really contributes anything, but here's another pic of a fun 80s aero car.

its an Audi S1 pikes peak car

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Buttcrack &raquo;</TD></TR><TR><TD CLASS="quote">i see similar designs on many of the rectangular 80s GT cars, but never do i see somthing like this on newer cars. </TD></TR></TABLE>

While the basic concept of most of that stuff is sound, it's a rather crude execution. "Modern" car aero accomplishes the same or greater downforce but with much less drag.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by maxQ &raquo;</TD></TR><TR><TD CLASS="quote">
While the basic concept of most of that stuff is sound, it's a rather crude execution. "Modern" car aero accomplishes the same or greater downforce but with much less drag.
</TD></TR></TABLE>

Just a guess, but perhaps because more modern cars take advantage of under-carrage aero dynamics?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Emerika &raquo;</TD></TR><TR><TD CLASS="quote">
I thought Lee would know this
still the shock guru </TD></TR></TABLE>

I am not an Engineer by education (BS in Journalism/Public Relations actually) so I don't get to drive the train and blow the whistle or have the cool grey and white striped engineer's hat.

In shocks, our oil is a fluid like one typically thinks of in the normal use of the word "fluid".

Here is the BMW 320 racecar that I thought of that has the extra wide wedge nose as it was wider than the cool CSLs. Look at the head-on drawing at the bottom and see how much width they added. http://www.geocities.com/simon....html

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by emwavey &raquo;</TD></TR><TR><TD CLASS="quote">

Just a guess, but perhaps because more modern cars take advantage of under-carrage aero dynamics? </TD></TR></TABLE>

That, too. But the upper elements themselves are crude (and so were the tools needed to develop them).

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CRX Lee &raquo;</TD></TR><TR><TD CLASS="quote">
I am not an Engineer by education (BS in Journalism/Public Relations actually) so I don't get to drive the train and blow the whistle or have the cool grey and white striped engineer's hat. </TD></TR></TABLE>

I was in my third year of engineering before I realized it had nothing to do with driving trains. *sniff*

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by maxQ &raquo;</TD></TR><TR><TD CLASS="quote">I was in my third year of engineering before I realized it had nothing to do with driving trains. *sniff* </TD></TR></TABLE>

Did 3 years of physics thinking it was gym class, and doing 2.5 years of mechanical engineering wondering why I don't even have my uniform yet. I should have been an aerospace or nautical engineer. Flying trains around gets you "in" way faster than a straight up pilot.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CRX Lee &raquo;</TD></TR><TR><TD CLASS="quote">
Or maybe it was just bling and he had a little tiny dick and needed a way to impress the bitches.</TD></TR></TABLE>

Time for a new signature....

 

A multi-element rear wing creates more downforce but at a higher drag penalty than a wing with a single element. See F1 front and rear wings (McLaren uses 3 elements in the front and I believe the rules limit the rear to 2 elements). Also, the slats and flaps of aircraft use the same principle, but for lift.

-Jeremy

 

Here is a nice link for you aero-geeks:
http://www.mulsannescorner.com/data.html
Listing of various road cars and race cars, and the downforce/drag ratings and ratios.

Link to the main site, click on the cars on the left for nice technical breakdowns (and click on the pics to open more information) http://www.mulsannescorner.com/

Brian

 

9275 lbs. @ 200 mph, with 2097 lbs. of drag


OMG.

 

Damn Jeremy(I Drive A Saturn), that Aerospace Engineering degree must have taught you something!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Brian*Blue95M3 &raquo;</TD></TR><TR><TD CLASS="quote">Here is a nice link for you aero-geeks:
http://www.mulsannescorner.com/data.html
Listing of various road cars and race cars, and the downforce/drag ratings and ratios.

Link to the main site, click on the cars on the left for nice technical breakdowns (and click on the pics to open more information) http://www.mulsannescorner.com/

Brian</TD></TR></TABLE>



Mike's site is awesome, I recommend everyone here get lost in it and spend many hours reading the great stuff on it!

 

I dig the Silhouette cars from the 80's. They are very intriguing to look at and this one is no exception:

Click below for a few more pics.
http://www.imagestation.com/al...rt=31





Modified by SUPERAUTOBACS at 10:43 PM 7/9/2004

 

A billion horsepower pretty aptly describes the FJ20 engines used in that S12 Silvia and R30 Skyline.

 

Same principles are still being used today, but with a modern twist. The German DTM circuit has basically the same set-up's as those 80's model Japanese cars, but with a modern design. Less crude as engineering is ten times better.




Same basic concept. Wider fenders for wider tires/larger brakes/lower turning resistance. Open fenders for reduced drag(front)/cool brakes, tires, oil cooler, fuel cooler, help induce vortex, reduce drag(rear). Long front lip to allow air to go up and around car/cooling: basically having the same affect on an F1 open wheel. Large front and rear wing to for balance/vortex inducing, etc etc..


A bit overkill for a street car that's meant to save the most gas it can and not being flung into hard corners over 60MPH.