I recognized this as an owl because I actually saw one almost take my pet parrot, Charlie Cockatoo, one day while I was sitting out on the porch. (This was some years ago; I never sit out on the porch anymore because crack addicted freaks who started moving in after I moved here.)
It was so fast I almost didn't know what I was seeing, but Charlie SCREAMED (louder than usual) and I immediately stood up - although I didn't see anything - and something that looked like a bundle of gray rags DID A FLIP IN MIDAIR and sailed back into the pines that are heavy in the yard here. I was like, "Oh, that's an owl." Charlie was out of his cage at the time, walking up and down on the porch rail like he used to do before we stopped going outside - he saw the owl and knew he was in big trouble, even though the bird was a bit smaller than he.
We used to hear them hooting all the time but now that is rare, because - yes, you guessed it - crack addicted criminals who moved into the neighborhood, making life miserable for everyone who just wants to live, work, and paint a crazy picture every once in awhile.
Pretty good design for a series of random mutations!
“Trailing edge asymmetric serrations”
Interesting concept.
Birds have very soft flexible wing surfaces.
Application to aircraft? Not sure.
I think composite structures have different resonances than conventional aluminum and alloy wings.
“Paint A Crazy Picture,”
Ha, that’s Entertainment!
Thanks,
Trailing edges are Fascinating !
Sounds more like,a wandering Napa Valley rebob, aka flying monkey- they love parrots
https://crypticchroniclespodcast.com/the-napa-rebobs/
Owls are a composite of unique functioning parts. It’s almost as though they were...created...that way.
Owls go after Jays? Bring more owls.
Soon quiet helicopters.
Wind turbine noise. Oops. But I thought wind power had no downside...
It appears every time I read about a new breakthrough, it’s coming out of China.
Fig 3. Schematic of geometric models of the (a) owl-based airfoil, (b) oblique-arc trailing-edge serrations, and (c) conventional trailing-edge serrations.
boundary layer shedding? or not fast enough
My wife and I were watching a cardinal on the railing of our deck, admiring the beauty. Wham, a hawk snatched it up in a shower of feathers. Pretty cool.
BS. The chicoms are actually experimenting with owl viruses.
We're not talking Vincent Van-Gogh "Cutoff an ear crazy," are we?
How about Edvard Munch, The Scream done in 1893 kind of crazy?
Many years ago, was back visiting the folks in Montana and took a walk around their small farm. The south end of the farm was populated with Ponderosa pine of various sizes and ages. Dad had told me he had seen a pair of Great Horned owls around.
Anyway. Traipsing along lost in a haze of memories, I was enjoying the smell of the pines and crunch of the needles and small twigs and cones, when I was brought out of my time-travel reverie with a heart-stopping shock when a Great Horned owl skimmed silently, and slowly, over my head but a couple of feet above. It was all wings, with a wing-span of some six feet or more, and gave me one HELLUVA start (a “dial 9-1-1 and charge-the-defibrillator” kind of start). Completely silent. I’ve had geese and large ravens glide over but their glide is an audible whisper. The owl was utterly soundless. If I had been aware, I could have nearly touched it, so low was its glide path. Very cool.