Bronco_Bustin

Does anybody know what the Drag Coefficient on our JK's are? 2 and 4 door?

Just Curious, I'm studying aerospace engineering at San Diego State University and I start getting crazy thoughts when I try to apply all the theory to practical cases.

I tried to research it but all I found is that the older model wrangler was .55.

BlackNorthernJK

dude! Your the one studying aeroscpace engineering, You tell us

Bronco_Bustin

Give me a 1/5th scale model and then I will tell you,,,

Sharkey

Not sure, but I bet it's somewhere between the DC of brick wall and that of a parachute.

Bronco_Bustin

That's what I figured... the first thing they teach you is that a flat plate is the most NON-aerodynamic shape there is...

Atl JK

I could probably find it somewhere if I looked, but I know its significantly better than the TJs were.

JayhawkJeep

Couldn't you just use a brick 1/5 the size of a Jeep and get your data? (not that I know what Drag Coefficient means, sounds smrt and stuff.)

Bronco_Bustin

That's funny!

spinlock

The 4 door CD will be lower than the 2 DR because the form drag will be lower (like a pickup truck with a camper shell). A sphere (non-smooth) is ~ 0.45 and flat plate normal to the air flow is around 2.0+. The JK is somewhere in between. This all assuming you are in nice uniform airstream (laminar flow).

You can approximate it, by using the power curve (to the wheels) and equate it to the drag, measure the frontal area and you are on your way.

Rest assured the 3.8L does not generate enough thrust and lift for air travel.

BlackNorthernJK