Aerodynamics in off road racing

[FABRICATOR]

With real 3d models and Catia.... The crap you can do in a computer simulation is incredible.

So how would having nothing sticking up into the cab but two helmets, and nothing sticking up above the bed, compare to running a windshield?

[SPONSOR]

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[FlyHiFlyLo]

So how would having nothing sticking up into the cab but two helmets, and nothing sticking up above the bed, compare to running a windshield?

Compared to what the setup is now Aero wise they would both have benefits. But the two helmet deal with a smooth top is MUCH better than a windshield because unless you run side windows and a sloped tail section the windshield creates a pretty significant negative pressure zone directly behind it and it will actually suck air into that zone from the side windows and back window. But it will divert more of the air over the open passenger compartment. Then when you factor in the extra weight and systems (Defogger, wipers) required to run a windshield it pretty much settles at what they run now. Windshield would be good for a few extra mile an hour over 90mph. (But then it might also suck the roof off)

You can see the vacuum (white dots) So just consider that dirt and exhaust fumes. LOL

[FlyHiFlyLo]

And everyone thought those number plates where to hold stickers? Look at the A-Pilar interaction with the trailing edge of the fender.

[FlyHiFlyLo]

Notice the light bar is moved way back?


Looks like the air moving across the top of the roof helps clean up the air under the light. But it could have also been there to help with weight balance.

[GoLeft]

If you want to Fly Hi or Fly Lo you need Schmaerodynamics.

Run this one through your program.

[FlyHiFlyLo]

Run this one through your program.

The ultimate mobile meth lab.

[philofab]

Just add more horsepower...

Aerodynamics are for people who can't build engines.

- Enzo Ferrari responding to driver Paul Frère as to why his 250 TR had a limited top speed on the Mulsanne straight at Le Mans.

[FlyHiFlyLo]

Just add more horsepower...

Aerodynamics are for people who can't build engines.

- Enzo Ferrari responding to driver Paul Frère as to why his 250 TR had a limited top speed on the Mulsanne straight at Le Mans.

But it was said in Italian so it sounded even more ignorant in person. LOL

[Old School 8]

Since the subject is "aero", I looked these up in an old scarapbook. Both photo's of the Mickey Thompson Challenger, appear to have different wings. One photo was taken downtown Vegas at Contingency for the 1977 Mint 400. The other photo was taken in the pits of the Riverside Off Road World Championships in 1978. Wings were very common in the late 70's.

[FlyHiFlyLo]

Since the subject is "aero", I looked these up in an old scarapbook. Both photo's of the Mickey Thompson Challenger, appear to have different wings. One photo was taken downtown Vegas at Contingency for the 1977 Mint 400. The other photo was taken in the pits of the Riverside Off Road World Championships in 1978. Wings were very common in the late 70's.

Mickey ran land speed. He knew about aero. Look at the shroud around the driver compartment.