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(YouTube)   Unpowered "drone" clocked at over 545 MPH   (youtube.com) divider line
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5290 clicks; posted to Main » and STEM » on 20 Jan 2021 at 11:28 PM (16 weeks ago)   |   Favorite    |   share:  Share on Twitter share via Email Share on Facebook



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2021-01-20 7:05:55 PM  
It's a "sailplane".
 
2021-01-20 7:13:30 PM  
Should have used vertical video, I can't see anything.
 
2021-01-20 7:36:50 PM  
what's with the going in cricles?
 
2021-01-20 8:02:55 PM  
The sailplane uses the wind coming over the top of the hill to add an additional bit of speed every circle.

https://en.wikipedia.org/wiki/Dynamic​_​soaring

It's flipping nuts that an unpowered RC sailplane is moving at 3/4 the speed of sound.
 
2021-01-20 8:55:12 PM  
The video made me airsick and I'm sitting in my living room.  WTF?
 
2021-01-20 9:05:42 PM  

Stephen_Falken: what's with the going in cricles?


It was foretold.
Will it go 'round in circles?
Will it fly high like a bird up in the sky?

https://www.youtube.com/watch?v=I_e-R​Q​ZVwxg
 
2021-01-20 9:10:11 PM  
Here's an earlier video that's easier to see.
FASTEST RC AIRPLANE IN THE WORLD! Transonic DP -- 545mph!!
Youtube MoaWlKC3wIM
 
2021-01-20 9:34:58 PM  

Stephen_Falken: what's with the going in circles?


Fark user imageView Full Size

Off-set my eye again. I hate you, subby.
 
2021-01-20 10:10:39 PM  
Six beers in and a wildly swaying camera--at least I think it is--nope, nope, nopity nope.
 
2021-01-20 11:34:08 PM  
If they gave it swept back wings, could it go supersonic?
 
2021-01-20 11:37:06 PM  
Look Mummy, there's an unpowered drone up in the sky
 
2021-01-20 11:38:00 PM  
Something that size and that speed would tear a human body to pieces.
 
2021-01-20 11:39:53 PM  
That wasn't an annoying video at all
 
2021-01-20 11:42:06 PM  
That can kill someone if it hit somebody.
 
2021-01-20 11:44:12 PM  

kdawg7736: That can kill someone if it hit somebody.


Yes, and the two people standing behind him, the dog and three horses the next county over......

At least that is what I heard.........
 
2021-01-20 11:44:38 PM  
I think I have whiplash.
 
2021-01-20 11:45:30 PM  
the video was not sped up....co could you slow it down so i could see it ????
 
2021-01-20 11:45:51 PM  

gopher321: Look Mummy, there's an unpowered drone up in the sky


The watching of that video is long gone, but the pain lingers on...
 
2021-01-20 11:47:42 PM  
.....so goodbye blue sky?
 
2021-01-20 11:50:30 PM  
good vid. Glad I took the time to watch it
 
2021-01-20 11:51:24 PM  
I usually watch Youtube videos at 2x speed.  For a while I forgot that this one was running at normal
 
2021-01-20 11:51:56 PM  
Now do that with a computer controlling it.
 
2021-01-20 11:53:39 PM  

WTP 2: the video was not sped up....co could you slow it down so i could see it ????


Fark user imageView Full Size
 
2021-01-20 11:54:01 PM  
My jaw was on the ground long before it hit top speed. I'm trying to imagine the constant g-forces on that thing as it makes those incredibly tight turns at hundreds of mph.
 
2021-01-20 11:57:07 PM  
I used to be into dynamic soaring RC gliders, there's a couple decent spots around where I'm at when the wind cooperates.

You quickly learn to over-engineer your wing spars.  Nothing like hiking half a mile down a hill hoping to retrieve the radio gear and servos from your expensive lawn dart because the wing folded up under load.

I had programmable toggles on my transmitter that allowed me to step down the input sensitivity as my laps got progressively faster during a run.  The faster the sailplane is moving, the less input you need on the stick, and it was really easy to overcorrect when the glider was hauling ass.

Fun stuff, expensive hobby, miss it / don't miss it.
 
2021-01-20 11:58:00 PM  

ArcadianRefugee: WTP 2: the video was not sped up....co could you slow it down so i could see it ????

[Fark user image 440x275]


yep i knew about it and tried it, the thing just disappears.
 
2021-01-21 12:02:53 AM  

MonstarMike: It's a "sailplane".


No, it's Becky.
 
2021-01-21 12:15:27 AM  

WTP 2: ArcadianRefugee: WTP 2: the video was not sped up....co could you slow it down so i could see it ????

[Fark user image 440x275]

yep i knew about it and tried it, the thing just disappears.


Yeah, I couldn't see shiat either; was hoping someone could.

I'll just take their word for it.
 
2021-01-21 12:25:43 AM  

BuckTurgidson: MonstarMike: It's a "sailplane".

No, it's Becky.


I'm pretty sure it was Taylor Swift.
 
2021-01-21 12:44:25 AM  
Pan out for the love of A.A. Cunningham!
 
2021-01-21 12:54:08 AM  

Stephen_Falken: what's with the going in cricles?


The circles are what helps build up that incredible speed. Plus at those speeds, if it went straight, they'd never find it again out in that desert.
 
2021-01-21 12:55:50 AM  
Fark user imageView Full Size
 
2021-01-21 1:02:06 AM  
Lunch projected onto monitor at approximately 48 MPH
 
2021-01-21 1:08:14 AM  
Fark user imageView Full Size
 
2021-01-21 1:28:59 AM  
I'm on my phone.
All I could see was a shaky sky.
 
2021-01-21 1:33:47 AM  

MonstarMike: every circle.


Ah. Thanks.
Saw it now when I understood what to look for.

No offense to Moike, sounds like a boring hobby* but a fantastic science experiment.

/*if all you do is circle, which I don't think is the case
//most people find other people's hobbies boring
///wait...is watching Netflix a hobby?
 
2021-01-21 1:59:55 AM  
Resident Muslim:

No offense to Moike, sounds like a boring hobby* but a fantastic science experiment.

/*if all you do is circle, which I don't think is the case
//most people find other people's hobbies boring
///wait...is watching Netflix a hobby?


None taken, boring was kind of the attraction of flying gliders.  I'd set up my lawnchair on the edge of a slope, toss the glider out, and I could just lazily ride the updraft along the ridges and stay in the sky till the batteries powering the receiver started to get low (hours at a time).But that was poking along at 20mph on average.

The dynamic soaring I did was something that only happened once in a while, wind conditions had to be right, and even with all my practice I could at my best only string together a dozen consecutive laps at speed before I'd make a mistake or my concentration would simply be fried. I doubt my D/S glider (NCFM Bluto)ever did more than 200mph in any of my sessions.

Every time I messed around with dynamic soaring I had to be totally fine with the fact that I'd likely destroy whatever I was flying in the process.  And my expensive composite glider I spent hours building would come home in a trash bag.  A sacrifice to the God of Speed.

That fact sitting in the back of my brain made dynamic soaring the very opposite of boring for me.
 
2021-01-21 2:02:07 AM  
I'm a (full sized) glider pilot, and have always wondered if someone would eventually use this technique with the edge of the jet stream to fly from North America to Europe.  These guys siphoned the energy for speed, but an aircraft that just uses it to maintain altitude might not have so rough a ride.  Truthfully, I imagine not for several reasons:
1. The transition isn't as sharp.
2. One mistake and you drop out and are out over the North Atlantic with no engine.
3. A human getting tired.

However, I image that a well-trained 'expert system' AI could possibly do it with an automated glider.  That is something I do expect will eventually happen.
 
2021-01-21 2:07:37 AM  

radinator: I'm a (full sized) glider pilot, and have always wondered if someone would eventually use this technique with the edge of the jet stream to fly from North America to Europe.  These guys siphoned the energy for speed, but an aircraft that just uses it to maintain altitude might not have so rough a ride.  Truthfully, I imagine not for several reasons:
1. The transition isn't as sharp.
2. One mistake and you drop out and are out over the North Atlantic with no engine.
3. A human getting tired.

However, I image that a well-trained 'expert system' AI could possibly do it with an automated glider.  That is something I do expect will eventually happen.


NO ENGINE LINDY
NYC to Paris
Any% completion
No tool-assist
 
2021-01-21 2:24:47 AM  

PainInTheASP: The video made me airsick and I'm sitting in my living room.  WTF?


Same here.  This is why they invented the steadicam.
 
2021-01-21 2:36:08 AM  
I had nfi what I was watching but now know what I didn't see in the video.

It's not really "unpowered" if it has a power source. It's only as "unpowered" as those Australian solar powered cars, or a pirate ship.
 
2021-01-21 2:39:26 AM  

moike: Resident Muslim:

No offense to Moike, sounds like a boring hobby* but a fantastic science experiment.

/*if all you do is circle, which I don't think is the case
//most people find other people's hobbies boring
///wait...is watching Netflix a hobby?

None taken, boring was kind of the attraction of flying gliders.  I'd set up my lawnchair on the edge of a slope, toss the glider out, and I could just lazily ride the updraft along the ridges and stay in the sky till the batteries powering the receiver started to get low (hours at a time).But that was poking along at 20mph on average.

The dynamic soaring I did was something that only happened once in a while, wind conditions had to be right, and even with all my practice I could at my best only string together a dozen consecutive laps at speed before I'd make a mistake or my concentration would simply be fried. I doubt my D/S glider (NCFM Bluto)ever did more than 200mph in any of my sessions.

Every time I messed around with dynamic soaring I had to be totally fine with the fact that I'd likely destroy whatever I was flying in the process.  And my expensive composite glider I spent hours building would come home in a trash bag.  A sacrifice to the God of Speed.

That fact sitting in the back of my brain made dynamic soaring the very opposite of boring for me.


Point taken.
So what have you moved on to?
 
2021-01-21 3:17:35 AM  

dyhchong: It's not really "unpowered" if it has a power source. It's only as "unpowered" as those Australian solar powered cars, or a pirate ship.


It doesn't have a power source. At least, not an internal one, which is the definition of "unpowered" in this context. No means of self-propulsion.

A pirate ship is unpowered. The World Solar Challenge cars are powered.
 
2021-01-21 7:12:34 AM  

Resident Muslim: /*if all you do is circle, which I don't think is the case


No, for dynamic soaring you have to move vertically through windshear as well, so the circles have to be inclined. For full sized gliders it's more of a theoretical possibility than anything, because you usually only find reliable windshear like that near the ground, in a region of the same order of size as the aircraft's wingspan. As a result, even when conditions permitted, trying it would be insanely dangerous.

It can sometimes be done higher up, where upper and lower winds are different.
 
2021-01-21 7:14:06 AM  
Fark user imageView Full Size
 
2021-01-21 8:02:36 AM  

moike: Resident Muslim:

No offense to Moike, sounds like a boring hobby* but a fantastic science experiment.

/*if all you do is circle, which I don't think is the case
//most people find other people's hobbies boring
///wait...is watching Netflix a hobby?

None taken, boring was kind of the attraction of flying gliders.  I'd set up my lawnchair on the edge of a slope, toss the glider out, and I could just lazily ride the updraft along the ridges and stay in the sky till the batteries powering the receiver started to get low (hours at a time).But that was poking along at 20mph on average.

The dynamic soaring I did was something that only happened once in a while, wind conditions had to be right, and even with all my practice I could at my best only string together a dozen consecutive laps at speed before I'd make a mistake or my concentration would simply be fried. I doubt my D/S glider (NCFM Bluto)ever did more than 200mph in any of my sessions.

Every time I messed around with dynamic soaring I had to be totally fine with the fact that I'd likely destroy whatever I was flying in the process.  And my expensive composite glider I spent hours building would come home in a trash bag.  A sacrifice to the God of Speed.

That fact sitting in the back of my brain made dynamic soaring the very opposite of boring for me.


I fly F3J competition with RC sailplanes. The amount of force I see when doing a launch on monofilament is huge to me. The ability for two men to tear the wings off by just pulling it on tow is amazing. When I watch DS it completely blows that out of the water. I've watched several videos by Spencer, the designer, builder, and pilot of the model in that video. He talks about how they had to overcome a lot of issues that are completely foreign to models of that size. The shear forces involved are ridiculous.  The kinetic energy in that model would go through a car if it hit.
 
2021-01-21 8:03:30 AM  
That video hurt my neck.
 
2021-01-21 8:59:20 AM  
Soaring RC planes is one of my fave hobbies, but I live in flatland and have never been able to slope soar a glider. My sweet spot is the cheap and common 2-meter wingspan, 2-channel "floaters" but I have a 3-meter Dodgeson  Lovesong I restored (with all the tricky mechanical flap mixing) after a friend picked it up at an estate sale for ten bucks. I'm afraid to bungee-launch that big a beast, the wingspan is wider than my garage door. It needs aerotowing or a real winch at least, which I've never tried,  and I'd need to join a club and drive a ways to a club field to do that.  I'm also interested in discus-launch HLG type sailplanes, and I like making faux jets out of blue insulation foam, powered by an electric propeller. You can't see the prop in flight, but it's way cheaper than a ducted fan, and can run longer. I like to build those big and light and over-powered, so they have ridiculous maneuverability and "present well" in the air.  Best part of all that is, if it crashes, and the battery or radio components aren't damaged, the financial hit is about on a par with a breakfast at Denny's.  I have never flown anything worth more than 200 bucks because worry about loss takes the fun out of things. Flying stuff that cost 50 or less to put together is sheer joy, and I fly it like I stole it.
 
2021-01-21 10:11:41 AM  
I thought he was fapping with his camera hand and decided I didn't want to see how it ended.
 
2021-01-21 10:15:20 AM  

Stephen_Falken: what's with the going in cricles?


Have to keep it in radio range.  Lose concentration for a few seconds and its gone.
 
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