Random UnAerodynamic Cars and Trucks Thread

[kach22i]

Random TRANSPORTATION pictures - Page 1728 - Pelican Parts Technical BBS

[Fingie]

I drove this model in the military. 6.2 GM V8 (150hp, related to the engines used in the Humvees) coupled to a TH-series 3-gear Au"tomato" (Th-350?)

The damn thing had a mileage of 2,9 MILES PER m****rf***ing gallon
Also topped barely 36MPH.

[kach22i]

Originally Posted by Fingie

The damn thing had a mileage of 2,9 MILES PER m****rf***ing gallon
Also topped barely 36MPH.

I'm pretty sure that had little to do with aerodynamics, but I am puzzled by the apparent abandonment of the concept of deflection angle armor.

I guess it's just a box in which to transport troops and supplies over rough terrain then?

Looks like they borrowed some Humvee doors along with the engine.

Well, that design may have never seen a wind tunnel, but who would have thought these examples below would have?

Aerotechnic Institute - The S6 wind tunnel

Built in 1981, the S6 wind tunnel is a climatic wind tunnel design primarily to perform aerothermal studies on large vehicles such heavy weight and military.

With a dynamometer roller, it also allows for testing road simulation, with and without sunlight. Its dimension makes it also suitable for areas of study such as aeronautics and eolian.

Sound like they are mostly testing the cooling systems?

Aerotechnic Institute - The S6 wind tunnel

Examples of application areas

Cooling of automotives and military vehicles
Simulations of sunshine
Various studies on cars, trucks, buses, lorries, sail, drones, ...

A new to me term; aerothermal studies............still learning.

[Fingie]

water trapped annoyingly on the windscreen in hard rain.. And it's a glassfibre-kevlar sandviched top, with a aluminium bottom.

And yes, it is a offroading troop carrier, albeit there is a version with a heavy grenade launcher at the back.

there was a planned model that would have a rear-mounted tower for a Euro-spike launcher.

But those are only equipped with a old anti-aircraft gun nowadays.

[gumby79]

]Is that a tracked trailer or is the back one trying to get3.0mpg by drafting? Lol. Theas had large fule tanks I'm guessing 100-150usg. 300 mile range required by US Army, For logistics
----

Sound like they are mostly testing the cooling systems?

With the addition of sun lights. They mayalso be looking at how the heavy angles effect the Infrared signature is affected

[ChopStix]

Uh-oh hotdog! -lol

[freebeard]

Originally Posted by kach22i

Guys, the top of the car is like the top of a wing, except to simplify discussion for a moment forget the underbelly of the car and ground pressure wave. Focus instead on the longer path the air travels going over the top of the roof verses flowing along the sides in straight line and shorter path.

Here's a thought experiment: What would happen to that shape if it were going backwards?

Originally Posted by ibid

A new to me term; aerothermal studies............still learning.

TIL they study the aeronautics of [parachuting?] tanks!

On topic pic:

Guns, Oil, & Dirt : Photo

ChopStix -- Here's a very well done* digital magazine:

https://www.hotvws.com/digital-magaz...page=1&noflash

It's about the Jogja Volkswagen Festival in Indonesia. Try pages 34-35 for Type II food trucks.

* I actually like that the ads are embedded in the content (beyond Adblock's reach) as it makes it more like the print magazine I read for decades. And electrons are cheap so they can add lots of local color to the story. Resolution is much better than ink on paper.

[gumby79]

Freebeard would the "hot dog " on the last VW, act like the bow brake on a ship or is the renalds# to low in air?

[freebeard]

Interesting question. I suspect it's a little too 'happy to see you'; for the stagnation point and for driver visibility.

I was more interested in the tail piece, but I failed to save the picture. It's similar, and the upsweep qualifies it as what I'd call a high-tailed stinger. In any case, they improve the fineness ratio.

[kach22i]

Originally Posted by freebeard

Here's a thought experiment: What would happen to that shape if it were going backwards?

It would similar to any other bluff body with truncated fastback/hatchback (flat plane). A big old vortex generator.

A couple of those hot dog vehicles are not so bad.