#wind tunnels

[high-quality-tiktoks]

Oh there goes gravity💨 😮

[fuckyeahfluiddynamics]

Streamlining Circa 1936

This 1936 promotional film by Chevrolet explains the concept of streamlining objects to reduce their drag. And it actually does a pretty nice job of it, including some wind tunnel footage and table-top demonstrations. (Video and image credit: Chevrolet; submitted by Larry S.) Read the full article

[marlynnofmany]

What if mermaids are all waterbenders, not just because that would be cool, but because it’s the only way they can swim at the same kind of speed as the more streamlined sea creatures? Maybe pixies are airbenders for the same reason.

This thought brought to you by the hummingbird doing dive-bombs outside my window. I imagined a pixie moving that fast, and got a mental image of Tinkerbell in a wind tunnel.

[zazamatic]

Wind Tunnels

https://www.theatlantic.com/photo/2018/05/historic-photos-of-nasas-cavernous-wind-tunnels/560660/

[providencepubliclibrary]

Magician of the Week #50: Eusapia Palladino

Magician of the Week #50: Eusapia Palladino

Today’s magician is not technically a magician, but rather an Italian spiritualist and medium named Eusapia Palladino.

Palladino’s “phenomena” referenced in Carrington’s book, above, included levitating tables and stools, bells ringing in the air, mysterious hands touching observers, sounds of ghostly tapping on furniture, and the like.

An orphan and former wife of a traveling conjurer, she was…

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[zodiacpostgenerator]

The signs as Wind tunnels:

Aries: AGARD-B wind tunnel model

Taurus: Klebanoff-Saric Wind Tunnel

Gemini: Wind Shear Wind Tunnel

Cancer: WindShear

Leo: Virginia Tech Stability Wind Tunnel

Virgo: Aerodynamic and Propulsion Test Unit

Libra: Vertical wind tunnel

Scorpio: Hypersonic wind tunnel

Sagittarius: Glenn L. Martin Wind Tunnel

Capricorn: National Wind Tunnel Facility

Aquarius: Eight-Foot High Speed Tunnel

Pisces: Supersonic wind tunnel

[fuckyeahfluiddynamics]

Flight testing models has a long history in aerodynamics. (Image credits: JN-4 - NASA, O-2 - M. Woodruff; via Rainmaker1973; submitted by Marc A.)

[fuckyeahfluiddynamics]

Skeleton, the sliding event in which athletes race down an ice track head first, is a fast-paced and punishing sport. Skeleton racers can reach speeds of 125 kph (~80 mph) during their descents. This is a little slower than the feet-first luge, in part because the skeleton sled runs on circular bars rather than sharp runners. 

Body positioning is key in the sport. It’s the athlete’s primary method of steering, and it controls how much drag slows them down. But skeleton runs are brutally taxing; athletes pull 4 or 5g in the turns -- more than astronauts experience during a launch! All that jostling means athletes cannot stand more than about 3 trips down the track in a day. To practice positioning without the bone-jarring descent, athletes can work in a wind tunnel. While the wind tunnel provides the aerodynamic equivalent of their usual speed, athletes focus on holding their bodies in the most streamlined position. Some wind tunnels are even able to provide screens that let the athletes see their drag values in real-time, letting them adjust to learn what works best for them. (Image credit: N. Pisarenko/AP, Bromley Sports)