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This video shows what happens to the air flow over a wing as it stalls.  Yarn, placed all over this airplane wing is pushed backward by laminar airflow during regular flight.  When approaching stall speeds,  the laminar layer moves forward more and more until it is all the way at the leading edge of the wing and drops off, causing the wing to stall. The yarn shows the turbulent air moving forward very clearly.
Note where the turbulence starts as the wing starts to stall, and how it reorganizes as the wing recovers from the stall.
https://www.youtube.com/watch?v=AYYvdD3qnFQ
This video was made by Harv’s Air in Stenbach, Manitoba, where the pilot taped four rows of 4.5 inch long pieces of yarn over the entire wing of a Diamond DA40. The flight was over Southern Manitoba.
This video does a good job of illustrating what happens to the airflow as it goes over the wing during stall. Read more about stalls and angle of attack here.

Alicja Gados

I was born in Europe (Poland) and moved to Calgary as a young kid and grew up in Canada. I began graduate school in Edmonton, Alberta where I also began ground school and my private pilot’s license training at Edmonton city centre, the now closed, Blatchford field, CYXD (most operators have moved a short way west to Villeneuve). I moved to the rocky mountains, I transferred flight schools to very busy, and windy Springbank airport – CYBW near Calgary. This move was overwhelming, at best. This is a blog about my experience learning to fly, acquiring more flight experience and ratings but also about general aviation topics, news and gear reviews. I’ve discovered that flying takes a lot of studying, work and dedication, but is very rewarding! I started flying just out of graduate school, so I have struggled with paying for my lessons, and as a result, I have to take many breaks, which means that getting licensed has taken many more hours than normal. I am a commercial and multi IFR rated licensed pilot. I completed my PPL and CPL in Calgary-Springbank and multi IFR (group one) ratings in Abbotsford, BC at Chinook Helicopters. If you are learning to fly, interested in learning to fly or just interested in aviation, please join us. I trained as an economist before becoming a pilot and switching to aviation full time. I enjoy climbing, mountaineering, hiking, camping and backcountry skiing. It’s a great time to be in aviation. The industry is growing.

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