![Yohan Hadji](/img/default-banner.jpg)
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Yohan Hadji
Приєднався 21 бер 2020
Micro-engineering student at EPFL. Maker and entrepreneur by night.
R2Home is about making radiosondes reusable: r2ho.me
SuperAntennaz was about tracking satellites with directional antennas and the SatNOGS network.
Open to technical criticism and suggestions. My contact is right below.
R2Home is about making radiosondes reusable: r2ho.me
SuperAntennaz was about tracking satellites with directional antennas and the SatNOGS network.
Open to technical criticism and suggestions. My contact is right below.
Stratospheric Glider Tail Camera
What is it? This is a 240g glider returning to home after releasing from a weather balloon at 30'000m altitude. The ascent time is 100min and the descent time between 35 and 45min depending on the day. The landing accuracy is roughly 30m. The glider is completely autonomous.
Regulations: The system is considered as a normal radiosonde/weather balloon in Switzerland and in the US already. Thus the same rules as for normal radiosondes applies. In Switzerland, no special permission is required to launch a balloon with a payload of less than 2kg, and a volume of less than 30m^3, from more than 5km away from any airport or restricted area. A special insurance is required for payloads of more than 500g. More than 800'000 radiosonde of similar weight and size are launched every year all around the world.
More infos about the next step soon here: r2ho.me
#weatherballoon #stratosphere #glider #technology #tech
Regulations: The system is considered as a normal radiosonde/weather balloon in Switzerland and in the US already. Thus the same rules as for normal radiosondes applies. In Switzerland, no special permission is required to launch a balloon with a payload of less than 2kg, and a volume of less than 30m^3, from more than 5km away from any airport or restricted area. A special insurance is required for payloads of more than 500g. More than 800'000 radiosonde of similar weight and size are launched every year all around the world.
More infos about the next step soon here: r2ho.me
#weatherballoon #stratosphere #glider #technology #tech
Переглядів: 19 647
Відео
Stratospheric Glider Flies Into Storm
Переглядів 12 тис.Місяць тому
Test campaign in collaboration with Mike Vergalla: FreeFlightLab ua-cam.com/users/mike123V www.linkedin.com/in/michael-vergalla-4a18a813/ Regulations: The system is considered as a normal radiosonde/weather balloon in Switzerland and in the US already. Thus the same rules as for normal radiosondes applies. In Switzerland, no special permission is required to launch a balloon with...
Return To Home from the Stratosphere
Переглядів 81 тис.2 місяці тому
(Thumbnail by Darrin Vanselow for PME) Regulations: The system is considered as a normal radiosonde/weather balloon in Switzerland and in the US already. Thus the same rules as for normal radiosondes applies. In Switzerland, no special permission is required to launch a balloon with a payload of less than 2kg, and a volume of less than 30m^3, from more than 5km away from any airport or restrict...
Windpower (2021)
Переглядів 68210 місяців тому
A weird video that I did for my dad a while ago but never published until Oct. 2023
R2Home Guided Parachute - First guided flight from 45'000ft
Переглядів 8 тис.11 місяців тому
This is an autonomous high altitude paraglider robot. First precision landing from this altitude. More testing to come to increase deployment altitude, improve reliability and flight performance. We're trying to make radiosondes reusable, more about the project on: www.r2ho.me.
R2Home Promotional Clip
Переглядів 3,7 тис.2 роки тому
Making Radiosonde reusable with style. Growing in Switzerland before flying all over the world. Foam shell in collaboration with design student Lucie Herter. More details about the project here: hackaday.io/project/176621-r2home
R2Home Guided Parachute - High Altitude Demo
Переглядів 4,9 тис.2 роки тому
Flight performed on July 6th 2022 at MeteoSwiss Payerne facilities, with the support from local staff for the weather balloon. Separation from the balloon at an altitude above 3500m (11400ft). Landing within 5 meters from launch point. Ascent time: 9m30s Descent time : ~30min Follow the project on: hackaday.io/project/176621-r2home Foam shell designed in collaboration with design student Lucie ...
R2Home Guided Parachute - Tracked & Inside View HPR Flight I
Переглядів 6622 роки тому
Second video of the same flight, with tracked and inside view. Update video will follow in a few days :) More on the project: hackaday.io/project/176621-r2home
R2Home Guided Parachute - HPR Flight Test I
Переглядів 1,4 тис.2 роки тому
What a weekend! I'll explain in more details the result of this flight in the update video that I'll try to upload this week. More on the project: hackaday.io/project/176621-r2home
R2Home Guided Parachute : March 2022 Flight Test
Переглядів 3462 роки тому
A lot has been happening in the background since the last video in September. I'm working on an update video, but here is already a video of the latest test flight I conducted today. As you can see, the landing precision is quite good. Here are some technical details about the test : - Payload: 1 kg of steel - Drop altitude: 140 m - Wind speed: ~5 m/s Coming soon: - Model rocket test flight tom...
R2Home Guided Parachute : Multi-View Flight Demo
Переглядів 3,2 тис.2 роки тому
R2Home is a fully autonomous GPS guided recovery system, and this is a compilation from multiples test flights to get multiples views of the same events. Pour suivre le projet / More informations on : hackaday.io/project/176621-r2home YohanHadji r.2.home R2Home-115409647038561 #r2home #guided-recovery #parachute #model-rocket
R2Home Guided Parachute : Ground View Flight Demo
Переглядів 1,6 тис.3 роки тому
R2Home is a fully autonomous GPS guided recovery system, and this is a video of the latest test flight. More informations on : hackaday.io/project/176621-r2home YohanHadji r.2.home R2Home-115409647038561 #r2home #guided-recovery #parachute #model-rocket
GPS Guided Recovery System - Project Update 001
Переглядів 7943 роки тому
In this video, I give a quick update about the autonomous deployment and flight of R2Home. R2Home is a fully autonomous GPS guided recovery system, more informations on : hackaday.io/project/176621-r2home YohanHadji r.2.home R2Home-115409647038561 #r2home #guided-recovery #parachute #model-rocket #r2home #guided-recovery #parachute #model-rocket
GPS Guided Recovery System - Autopilot Demo
Переглядів 7263 роки тому
GPS Guided Recovery System - Autopilot Demo
GPS Guided Recovery System - Flight Test XI
Переглядів 6073 роки тому
GPS Guided Recovery System - Flight Test XI
R2Home - From the idea to the system
Переглядів 3,4 тис.3 роки тому
R2Home - From the idea to the system
GPS Guided Recovery System Flight Test IX and X
Переглядів 2693 роки тому
GPS Guided Recovery System Flight Test IX and X
GPS Guided Recovery System Flight Test V, VI, VII and VIII
Переглядів 5533 роки тому
GPS Guided Recovery System Flight Test V, VI, VII and VIII
GPS Guided Recovery System Flight Test IV
Переглядів 6083 роки тому
GPS Guided Recovery System Flight Test IV
GPS Guided Recovery System Flight Test III
Переглядів 5603 роки тому
GPS Guided Recovery System Flight Test III
Gps Guided Parachute Recovery - Test II
Переглядів 4373 роки тому
Gps Guided Parachute Recovery - Test II
SuperAntennaz - Rotator - Animation Version Finale
Переглядів 1,1 тис.4 роки тому
SuperAntennaz - Rotator - Animation Version Finale
SuperAntennaz - Rotator - First Move (Fall 2019)
Переглядів 3294 роки тому
SuperAntennaz - Rotator - First Move (Fall 2019)
SuperAntennaz - Rotator - And the sunshine (Winter 2019)
Переглядів 2484 роки тому
SuperAntennaz - Rotator - And the sunshine (Winter 2019)
SuperAntennaz - Rotator - Final Version (Summer 2020)
Переглядів 3,5 тис.4 роки тому
SuperAntennaz - Rotator - Final Version (Summer 2020)
SuperAntennaz - Rotator - Operating Version (Spring 2020)
Переглядів 2,9 тис.4 роки тому
SuperAntennaz - Rotator - Operating Version (Spring 2020)
It’s very doubtful how the 240g glider wasn’t blown away for many kilometers? At this altitude a very, very strong wind blows
but air density is also much lower! so there's less absolute drag force (Newtons), and thus higher speeds are possible/needed for gliding with the same L/D ratios (so that lift ~= weight). if airspeed >> wind speed were kinda safe
Exactly! at 30km altitude we usually fly at 80m/s ground speed, around 10km altitude, as you mentioned the windspeed is usually very high and the flight speed lower, so we mostly descend vertically. Most of the return distance is done between 20 and 30km altitude
Looks FLAT up there :)
😉So cool realy nice😉
The balloon might be legal, but I'm not so sure about the plane, even at 240 grams. It was obviously BVLOS until just before it landed.
Please read the description again. 10 of the flights we did this summer were with MeteoSwiss from their launch site in Payerne literally launching within military airspace. Autorities know the system and have confirmed it fits in the same category as conventional radiosondes.
@@YohanHadji I have to deal with the FAA here.
Well, we also got confirmation from the FAA that the system would also be considered as a standard radiosonde in the US
@@YohanHadjiI think when you release the plane, you will be in no-man’s land because it becomes a UAS..
No, FAA confirmed that it doesn't become a UAS after release.
I can't help but think the drone is singing that mudic
It's flat! 😂
Wow, super duper cool!!!
...fantastic!!!!!
Sweet! What speeds did you achieve after the drop?
Usually 70 to 80m/s, sometime up to 130m/s of groundspeed after release at 30km altitude!
@@YohanHadji 130m/s its about 400-500km/h. I see the wing is covered with thin carbon rods. IMHO the wing would have collapsed at 150kmh
@@unixoid33 thin atmosphere so less problems?
@@vidmasze ok maybe, but on low altitude?
I never said we're flying at 130m/s at ground level! We only fly that fast at super high altitude, the groundspeed at ground level is between 10 and 20m/s.
Crap sound from hell
Woa how fast does it have to go to glide at 30km (true airspeed)??
We usually have around 70-80m/s of groundspeed at 30km altitude and have already reached 130m/s at 33km altitude!
so it couldnt reach this hight alone......
yeah the ascent is done with a weather balloon!
👍👏🖖
Damn bro, that’s amazing. Getting the tuning right for thin air and high speed is incredible. I would have gone rudder trim only and let the aerodynamic stability of a free flight deal with the rest
is giued by gps?
yes it's giued by GPS
It would be super cool to see the full unedited 30 minutes of gliding
Without being blasted with music.
that's awesome as hell
Super video! Fantastic track choice! 👍
Hey Yohan, first of all, instant sub! I really enjoy those kind of projects! Quick (maybe not) question(s), am I correct to assume the UAV used GPS to orient it's descent direction directly after the balloon separation? If so, did you manage to use the GPS above 18km altitude? And if so, how? Also, did you degrease your servos for them to work in extreme cold? I would love to see this video with super imposed telemetry data. Thank you very much!!
Hey! Most Ublox GPS modules available today work perfectly fine up to 50km altitude and sometime even 80km altitude as long as you choose the "airborne < 4G" navigation filter in the settings.
Lake Geneva, Penthalaz.
good eyes!
Cool thumbnail and wonderful video!
Sorry if this is dumb question, but how did you get it up to that altitude?
Weather balloon !
How do they not recognize you as a hostile target? did you have a license
Amazingly beautiful
Enorme Yohan ! C'est super beau a voir :D
In understand the reasons for the first oscillations in the very thin atmosphere (beginning of the video). What is causing the high speed oscillations at for instance 1:15 ? That needs to be fixed! Also, I assume this is a noon launch at Payerne? (I study the Emagramm every day during gliding season...). BTW, great project to make the HW reusable! Can I help?
Just to make it clear the video is in x20 speed starting from a few seconds before 1:15 hahah but I think I see what you mean anyway. Yeah stability is hard, a bit harder with a huge camera (relative to the size of the glider) on the tail too. This launch isn't from Payerne but we have done 10 launches from and back to Payerne a few weeks ago with the support of MeteoSwiss! If you live in the eastern part of Switzerland and like building electronics you might help us by setting up a small ground station capable of receiving the telemetry of the glider. Every now and then we have a small issue with small gliders and having multiple ground stations would help with getting as much data as possible to recover them. Let me know if this sounds exciting (you can get in touch via the form on the website: https:r2ho.me or maybe ytb is sharing my email somewhere)
@@YohanHadji Ah, I missed the part that is is 20x speed. Still, you should get rid of the oscilations.... So, where was the launch from?
@@ronaldglider20min away from Lausanne
@@YohanHadji Ah, so I see lake Leman
Peut être que je peux aider, on a des bonnes antennes 2.4GHz à cheseaux!
yup the world sure looks flat! and Brovo on the success!
Do you use an off the shelf flight controller for autonomous flight?
the avionics doing the guidance is custom, on most days, you can't use the standard RTH procedure from existing software such as ardupilot/Px4 to return from the stratosphere to a precise landing point
@@YohanHadji Nice, it is really impressive how close it returns to you
> you can't use the standard RTH procedure from existing software such as ardupilot/Px4 to return from the stratosphere to a precise landing point do you mean doing to "routing", finding the better/safer path to fly? or in general? @@YohanHadji hmm my guess would be that with minor modifications Ardupilot should likely work (didn't test), e.g.: scaling of cruise/minimum speeds depending on air density/height (if doesn't exist already), configuring for proper gliding (prefer fixed airspeed with differing AoA, over fixed AoA and differing throttle -> should exist in soaring code, there's a setting). There's also Lua scripts to modify some Ardu behaviour (or raspberrypi over mavlink). no sure just about cheap airspeed sensor reliability at such heights. What I'd worry about would be stall-spin recovery, due to baloon/line/aiplane spinning during launch @YohanHadji did you experience any? without a rudder might be not easy to recover, and I doubt Ardu has/had code for that.
Confused because the video starts as showing the glider dropping but I don't see the view switch to the glider?
maybe because there are two gliders hahah! That was the whole point of the video but I feel like no one actually got it.. :'-(
@@YohanHadji No I actually did think that but I thought there was no way! That is insane man, really impressive.
ZOHD drift!!! Amazing!!!!!!!
A couple of months ago I watched a similar one from you. Totally incredible! How does the self flying works? Is it a restricted are via gps and a code you programmed? Super cool :)
Please tell us
@@johninyorkit's all autonomous with custom avionics running the guidance code and uses a GPS for position input yes
@@YohanHadjivery cool 👍🏼
600km range, interesting
who said that hahha?
@@YohanHadji well, 30km altitude and glide ratio 1:20 gets you there
@@ronaldglider We can only dream of 20:1. Reynolds is a git!
@@markpitts5194 Well, I fly gliders from time to time with 1:50 What do you mean by *git?*
Ohhh I wish we had 1:20 lol. Glide ratio is much lower on a glider with a 90cm wingspan haha
Spectacular video, and music edit. This a camera perspective is one not seen before Do like it.
Is this a ZOHD Drift?
Yes
another banger as usual
Awesome!🎉
Nice project! Is this ArduPilot based?
No the avionics doing guidance is custom
Could you do a video on the avionics? Like did you make the software yourself?
Yes software is custom, to be honest, not sure that video will exist in the short term, it would take way too much effort compared to just putting some music on the raw flight footage and I don't have that much time to spare but maybe I change my mind in the coming months!
Toi et ce drift entrez littéralement dans la légende C'est absolument fou comme projet 🫡
So cool! I wonder if the footage would look even cooler you try to stabilize the video footage a bit in post based on the moving earth in the background, that would probably be more smooth to watch when sped up. Also, the absolute cherry on top would be switching to manual radio control for the last 100m of altitude and than steer it into a handcatch. 😄
Encore une fois, bravo Yohan. J'aimerai assister à ça un jour. Ca doit être émouvant de scruter le ciel quand le modèle revient. Il y a une vingtaine d'année, il existait un module "Flight controller" chez Teamline qui remettait les ailes d'un avion RC à plat, et qui permettait même de se poser sans toucher les manches. Ca permettrait à ton planeur d'atterrir bien à plat.
Wonderful.
Pilote automatique où manuel ?
Tout est automatique!
maximum respect and a little envy
When I retire in a few years I'm going to do this
J’adore t’es projet continue de nous inspirer merci beaucoup et bon courage pour la suite 😊
Good thing you used a Fisheye Lens. Otherwise the YOU TUBE screeners would have Never alowed your video to be posted.
Flat earthers - don't watch this video! You might need further explanations (excuses).
how to do steering in falling balloon?
What a "wonderful" chem-sky.........
Oh nooo.. I have a bad feeling... 😢 I think it's fake. Sort of... Sorry
radiosondy.info/sonde_archive.php?sondenumber=U0510118Y radiosondy.info/sonde_archive.php?sondenumber=U3510394Z radiosondy.info/sonde_archive.php?sondenumber=U3510387 radiosondy.info/sonde_archive.php?sondenumber=U3524360
Oh nooo flat earthers will go crazy. But tbh Im pretty empressed that this is possible for a private person.. But sure why not. Buy a weather balloon some gas a go pro and go. OK the plane is optional and might cost the most amount of develop time, verry impressive. 20 years later. Mom I want to have a FPVETV - first person view extra teressstrial vehicle for my birthday 😂 Oh Danny we have a special gift for you, a one way ticket to hell ehhh I mean mars.