Видео

Nice, but my main concern is when they'll be available fpr the drones I fly. Dji mini series, neo, etc. People are unnecessarily crazy about drones, thinking they are being spied on. Not being noticed is important to me.

Mark Rober lied - that drone is NOT quiet

Im naming it the Whisperblades. Sush!

This is dumbed down to a high school level, until time 4:16.

The collision includes acceleration beyond light speed.

Dang, so were the same.

I'm more worried about children and animals woth those propellers. They have a higher hearing range than adults do and quite frankly I fond constantly barking dogs and screaming kids far more annoying that drone buzzing.

How about just using ducts to eliminate the tip vortexes?

I wonder if it's possible to improve unequal zipline propeller by connecting the propeller tips like in toroidal design. If ring shape of toroidal design eliminates turbulance caused by air flowing over the tip like in traditional propeller it might do the same also in zipline.

Which is most power efficient at lift? Cycloidal are too expensive?

Cool

5:30 what happened to that?

Use a centralized intake and pneumatics to spin the propellers... not four unique motors 😂

Right so the next upgrade should be attaching the 2 blades into a single toroidal shape and maybe extend the head of the counter weight to be wider

JUST..... just make the rotor larger. This will reduce the frequency of the noise and thus make it quieter to humans.

If these soundproporties can be carried over to big industrial windmills …. they might be less opposed in their environment, and help electrify and make clean energy in the future.

You forgot to mention the most important advantage of the asymmetrical design of the Zipline propellers, which is the reduced drag when not in use while the drone is moving fast in forward direction with the rear propeller and wings only.

Someone has to make it 3d printable for DJI mini Drones

This is brilliant

How about an unequal toroidal propeller? Would that work?

Interesting to consider other uses for quiet propellers. Like paramotors! @TuckerGott

toriodial propeller on racing drones? nah man, not a single fpv racing drone uses these

its sad that we had to wait til they figure a way to silence drones to get aerial pizza deliveries.

Like

In order to make the propellers silent, you must reduce the wake or turbulence caused by the propellers, a standard blade’s endtips produce a lot of wake, a toroidal propeller eliminates the need for an end tip, meaning that the wake is basically removed, but as we see in the new era of formula one cars, the rear wing appears to have no end plates, which reduces wake, and also reduce downforce efficiency, to the contrary, the 2017-2021 formula one cares had more boxy and turbulence causing rear wings, they were consistently more efficient and made the cars quicker, similarly, having an endplate on the end tip of a propeller is enough to not only reduce the wake but also give the propellers more lift, which yes still makes them more noisy, but making smooth ridges that go parallel with the airflow on the wing is enough to clean up the airflow enough to give a balance between having optimal efficiency and not being a noisy inconvenience, and some noise is generally good, because this is enough to alert us with them.

Yeah the impact is during war the quieter the deadlier

Um… When it comes to police and life flights, noise takes a back seat to performance. Now commercial uses I could see this becoming required.

Mind Blowing

Wait until that prop design gone mainstream. Imagine ww2 bomb dropping on you without the tell-tale wind whistle from the bomb.

What a piece of rubbish. It is not even nearly possible that CERN could affect the earth magnetic field. Typically American conspiracy 🙄 But a High-altitude nuclear explosions in 1967 actually made disorder in the earth magnetic field.

4:13 Mr.Robot look-a-like

There was once a time when passing commercial planes would be deafening to anyone on the ground. Nowadays, while planes are far from silent, you can easily continue a conversation (even where i live next to an airport) I'm looking forward to seeing how these delivery drones progress. Will they have to have traffic-type systems once there are hundreds in the same airspace? Will illicit goods become more easily delivered by blending in? What unforeseen problems will we find?

I have no idea but am wondering if this design can be adapted to helicopters. 🤷‍♂️

Wouldnt "areodynamic" only refer to air dynamics? You said "areodynamic" when referring to (and showing) a water propeller . . . I think you meant "hydrodynamic" in this case.

can you like at least cite your sources, like I know one of them is action lab but can you cite all of them?

Why arent these in Ukraine?!

Light and dark side mist return !!!!!!!!!!!!!!!

Why does the zipline drone have five propellers? Doesn't that provide a torque bias?

What's funny is there trying to see how space and time where formed but might end up doing the opposite

Hjuss this guy can talk

Noise reduction is important for military/police applications but for commercial drones I think the biggest issue is not noise but security which no one seems to be bothering to address. Especially if you are delivering expensive items.

Without taking away from this achievement: A good engineer can design something complicated. A very good engineer can design something simple. I'm convinced a much simpler optical switching mechanism can be made; but this is an excellent starting point. All you have to have is a NOR or NAND gate and you can build anything.

"Promosm"

bidon

WAKE SOON, DON'T BE WOKE...

SO, with climate change being SO critical, one of the largest players in flight is STILL making larger jet aircraft to supply to what customer? At what damage to the environment? Do you know how many jets flew to the last discussion on climate change? and put more of what they want you, YOU NOT THEM, TO STOP KILLING US ALL WITH, FUEL WISE? JUST STOP OIL (being used by the citizens), while the rich fly around in jets polluting like there isn't any pollution issue at all... MORE THAN 1500 JETS FLEW IN TO THE LAST CLIMATE CHANGE SUMMIT, but you must get an electric car you fools

I have a feeling Skoltech will not contribute much longer to this field 😅

I hope this happens

does that mean it found something to help it boomerang back? how far could it have even gone to come back so fast

**But are we 100% sure it's natural?** Given NASAs track record (along with the ISG's), I'm inclined to believe the exact opposite of everything they tell the public at large! I believe we've been to the Moon, and chances are good that we never left. However, **IT DID NOT HAPPEN AS THEY WANT US TO BELIEVE IT DID!** **Listen to the call, it's a bleeping recorded one way call!** **THERES NO WAY IN HELL THEY WOULD HAVE TAKEN THE CHANCE TO FAIL LIVE ON TV AS THE WORLD AND THE SOVIET UNION WATCHED!** **MARK THESE WORDS, THE DAY WILL COME WHEN THE AMERICAN PEOPLE WILL FIND OUT THATS WHERE ALL OF OUR MISSING FRESH WATER HAS BEEN GOING, INTO LUNAR CRATERS!** IT'S INVALUABLE IN THE MINING PROCESS! **I HAVE PROOF!**