Copying Nature - Feathers On a Glider Wing to Reduce Drag and Soften Stall

| IMPORTANT. This will be my last weekly video for a while. I have a lot to take care of academically and can no longer produce weekly videos. I may, however, post occasionally.
As for today’s topic; feathers! Birds use what are called ‘covert‘ feathers to reattach separated airflow during what would have been a wing stall. This stabilizes the wing even in the most turbulent of airflow, and allows continued lift production well into the stall angle range for most man-made aircraft. I was inspired to look into this idea by this video from Felix Schaller, linked here:    • Dynamic morphing Airfoil - gliding flight ...  
I experimented with the covert feathers in much the same way Schaller did; by making fake feathers from a thin, bendy material, and affixing them to the wing‘s upper surface. I used only one row of smaller feathers, but was still able to notice improvement in glide ratio and stall recovery. I have no doubt that, had I put more time into the fabrication of the feathers, and arranged more bird-like feather rows, the improvement would have been more drastic.
If you enjoyed the video, your like and subscription are highly appreciated! As I will be away from this channel for a while, I do entreat you to share my videos with friends, and to help me maintain viewership during my absence. I have hundreds of other videos, so there always something new to watch! That said, thanks for watching!


Footage credits:
   • Red Kites in Slow Motion - The Slow Mo Guys  
   • Awesome Video Seagull Catching Fish  
   • Red Tailed Hawk catching It's prey  
https://lizzieharper.co.uk/image/gull...


General Aviation Playlist:    • Видео  
F3P National Team Qualifications Playlist:    • Видео  
Birds On The Feeder Playlist:    • Birds On The Feeder - Mourning Dove  
UMX Aircraft Playlist:    • Видео  
Birds In The Wild Playlist:    • Birds In The Wild - Black Backed Gull  
Free Flight Gliders Playlist:    • Видео  
Radio Controlled Gliders And Sailplanes Playlist:    • Видео  
Homebuilt/Scratchbuilt Models Playlist:    • A big slow flyer  
General Aviation Playlist:    • Видео  
Copterdude's Got Mail Playlist:    • Видео  
Guillow's Models Playlist:    • A short tutorial; how to warp balsa surfac...