Random Aerodynamic Oddity of the Day Thread

[Bicycle Bob]

Official "flying wires" are flat, and not even coiled for shipping. There is a problem with flutter if they get too streamlined, though. Helicopter blades carry heavy ballast in the leading edge to keep them stable. One of the Kremer prizes was won by a flight with a pair of the thin piano wires left off, running from mid-wing forward.
What always astounds me, however, are all the round-section rollover bars on race cars. They are often extra-tall and wide, yet poorly braced, and with no attempt at streamlining. A foam fairing of the shape shown above would not be hard to do, and even a simple cardboard tail taped on would more than halve the drag. Even terrible paint would help, like the dimples on a golf ball. There are often other round bits hanging out in the breeze, too. Both the Goldenrod and Challenger used the same truck axle which left a large stub sticking out of the hub. The stubs could have been streamlined with a fairing on a bearing, like those non-rotating bling-bling wheel covers.

[kach22i]

Originally Posted by Vman455

Came across these images on Slowtwitch the other day. These two objects are acted on by the same drag force at a given velocity:

Butter Beans.

Seriously?

So the other day I emptied the contents of a tall skinny class into a much larger short fat glass..................they held the same amount it turns out.

I still get awoken by these long known facts once in a while.

You woke me today Vman.

[Vman455]

Me too. I had missed these the first time around, when they were posted in response to a thread about the 2014 Cervelo P2/P3. The former chief engineer for Cervelo wrote that their wind tunnel tests showed that the front derailleur hanger, a small tab that hangs off the down tube, generated more drag than the down tube itself. Crazy.

[ASV]

Originally Posted by kach22i

Random TRANSPORTATION pictures - Page 2195 - Pelican Parts Forums


Aerospaceweb.org | Ask Us - Wing Vortex Devices


May 15th 2019
BAE Systems 3D printing enables first ever flight using supersonically blown air
https://3dprintingindustry.com/news/...wn-air-155452/

ouch that first picture
talk about being sand blASSted

[freebeard]

That's precisely the configuration I'm advocating Arcimoto run with one of their electric tricycles. Just with a full envelope 'asset':



Converting the controls would be trivial. Invert the handlebars and add a 4-bar linkage to move the hydraulic brake foot pedal to the rear. The tandem bogey is to fit class rules.

[ChopStix]

I was browsing the News and found this. Its notably more "aero" than a lot of the RV's made today. I especially like the small size, curved sides, and top, which today are always made so blocky. The backend does nothing for aero, but neither do the majority of campers made today...





Original Article - Dually Camper

[freebeard]

Random.
Aerodynamic.
Oddity.


Just A Car Guy: Like I've said before, you better be on the look out, especially around those damn amateur airports

[cRiPpLe_rOoStEr]

The side profile of the roof extension in this Peugeot van is quite odd

[slowmover]

Re low-flying obstacles. FINISH first cup of coffee prior to leaving house each morning.

Note the tow rope. Just giving the other guy a hand with a rolling in-gear jump start. Ha! (Glider more likely).

[slowmover]

Originally Posted by ChopStix

I was browsing the News and found this. Its notably more "aero" than a lot of the RV's made today. I especially like the small size, curved sides, and top, which today are always made so blocky. The backend does nothing for aero, but neither do the majority of campers made today...





Original Article - Dually Camper

But there’s no getting around the weight & space inefficiency of a Motorhome. They are a dead end. Not worth any time or effort.

.