Cougar shape?

[Frank Lee]

Ummm... didn't see much science in that Laguna piece as far as geometry. Shows one way to build 'em though.

The Fusion is not really a trunk lid extension; they've raised the entire lid from the base of the backlight on back.

[cfg83]

Frank -

Originally Posted by Frank Lee

Ummm... didn't see much science in that Laguna piece as far as geometry. Shows one way to build 'em though.

The Fusion is not really a trunk lid extension; they've raised the entire lid from the base of the backlight on back.

Are you sure they raised the trunk? I think the side-spat starts where the trunk "meets" the window and stays the same height. Because the trunk slopes down, the side spats end up being like a quasi-fin. Here's a photo gallery :

Ford Hydrogen Fusion 999




Here's a picture from the Hi-res mode :



Hmmmmm, I guess the trunk could be raised maybe an inch or more. Is that what you mean?

CarloSW2

[Frank Lee]

It looked to me like the whole trunk surface was levelled out and raised at the rear.

It's kinda tough to "look through" those end plates.

I might have been wrong on that? In spite of your much better pics I'm not 100% sure now.

[cfg83]

Frank -

I think we're both right. Now I want to go to a Ford lot and look at a Fusion trunk without being hassled.

CarloSW2

[IsaacCarlson]

just tell em you don't have any money....oh, but then they offer you credit. THIS IS FORD CREDIT CALLING FOR.......

[cfg83]

Christ -

Originally Posted by Christ

I've seen this in my head, as well.

Anyone want to model it on that airflow mapper thingy program?

I just made this :



I will see if I can process it later tonight.

CarloSW2

[cfg83]

Christ -

Here ya go :

http://www.youtube.com/watch?v=CLiFBM4X8cQ

CarloSW2

[cfg83]

Christ -

I added a flat spoiler to create a "virtual" 13 degree slope.

http://www.youtube.com/watch?v=SvSfNVYVGXk

CarloSW2

[Christ]

The flow over the deck lid looks much smoother w/ the extension, but it looks like that really screws up the wake behind the tail lights, making a huge vortex that, at least intuitively, is going to create an even worse vacuum than the original wake would? (Yea, that's a question.)

Either way, I'm not getting the car... guy thinks he's got a gold mine. Literally, he wanted my quad and $550...

[aerohead]

Originally Posted by Christ

I do know that I can sleep in that trunk... used to have one.

When I looked at the pic, I wanted to make sure to pay close attention to the gentle slope of the roof line, which appears to be training airflow in a downward arc toward the deck lid.

While I don't think it's TOO bad, I do believe that rear window adds significant wake area, somewhat comparable to that which is created at the rear of the car's deck lid.

I think "fixing" the flow there at the window area could lessen the rear drag by at least 30%. No expert, so input is necessary here. (Phil?!?)

Yeah, I'd say definitely a rear spoiler.Ford has the roof falling off as it moves rearward and then I think we'd all agree that she separates at the backlight header,then may re-attach.Don't know.I do know that the angle between the rear edge of the trunklid and backlight is steeper than what Dr.Kamm would accept.He advocated no more than 10-degrees.You could probably cheat a little,say 12-13.
I'd do like CAR and DRIVER on the Pinto and Z-Car.Angle the spoiler up to the rear at 30-degrees and take it as high as you can live with.In a perfect world.the spoiler would reach up until it intersected the imaginary line of the Kamm or Jaray roofline which is what the template is all about.
Also,the straight-back foil,as on the Fusion is good,it just has to go way back before it intersects the 10-12 degree line.
Oh,by the way,999 was the number of Ford's first race winner.I think Barney Oldfield drove it to victory.That's why they used it on the Fusion.