One of the most beautiful rockets out there, love its powerful appearance.

@small_SHOT

5 жыл бұрын

I like the Ariane 5’s look too

1996!? Incredible. It must be amazing for any engineers that worked on this beast of a machine to see that it is still an operational design this many years later! Bring on the 100th!

@lake258

5 жыл бұрын

Soyuz program: "Hold my kvas".

@TommoCarroll

5 жыл бұрын

Андрей Желтяк haha. Nicely done.

@nicewhenearnedrudemostlyel489

5 жыл бұрын

i feel you, but i just can't get as excited over 5 launches per year, for over 20 years. no humans, and barely anything other than communications... otherwise, it's great to have more people involved in space programs, and countrys doing the legwork.

@TommoCarroll

5 жыл бұрын

NiceWhenEarned RudeMostlyElse it is a shame that’s for sure. But right now it feels like there’s a huge resurgence in passion for the industry around world - maybe it’ll lead to some great things. What do you think?

@nicewhenearnedrudemostlyel489

5 жыл бұрын

@@TommoCarroll my passion is quite high, and i must agree that there has been a large resurrection in the field. I'm currently(home) studying and building sounding rockets, and aero uavs otherwise. the field is definitely alive. lol.

fun fact: the Cluster satellites (that blew up with the first Ariane 5) where rebuilt (they actually managed to get some extra funds) and while doing so people found that there was some flaws in the design of the satellites that would have make those not work properly (not sure what though, I heard that a few years ago from a guy that worked on the Cluster mission).

@RappinPicard

2 жыл бұрын

I’ve heard similar scuttlebutt from people that the payload wasn’t ready and had failed some tests and would have likely failed on orbit. The launch failure meant that insurance would pay for new satellites that would have corrected the issue but had the rocket worked and the satellites failed on orbit, they’d have been SOL.

That bug is fairly famous amongst french aerospace software engineers, i'm glad it gets some exposure. Remember kids, know how your data is encoded, and understand in what context your code is executed.

@AlphaSquadZero

5 жыл бұрын

It was used as an example in my computer engineering course

@yottaforce

5 жыл бұрын

Danish Electronics engineer here. I've heard about it many many years ago.

@quoniam426

5 жыл бұрын

I knew someone who worked on Ariane 4. He retired before Ariane 5 was built but he instantly knew what happened when he saw Ariane 5 explode on TV. He went "facepalm, they surely used Ariane 4 software instead of creating a new software for the new rocket..., idiots !"

@calaphos

5 жыл бұрын

I think its one of the most famous examples for bugs in europe, especially in the aerospace sector.

@dj_metanov

5 жыл бұрын

so true... I was also working in that sector for a while! :)

The Ariane 5 test launch failure is a very instructional episode of the dangers of software reuse. When I worked for a major aerospace company as a software engineer, I brought it up several times and was completely ignored each time. There seems to be something deeply embedded in the human mind that ignores dangers unless you can PROVE that a disaster will occur. The same tendency was responsible for both space shuttle crashes and many other technical disasters.

@averagegeek3957

5 жыл бұрын

I'm really interested, because I want to go into the aerospace industry as a software engineer in the future, can you go into detail? What kind of issues did you brought up and why were they dismissed?

@EtzEchad

5 жыл бұрын

AverageGeek I can’t go into too much detail because it is somewhat proprietary but there were many issues that I brought up. The Ariane 5 issue came up because the company wanted to reuse software. In safety-critical systems like aerospace, it isn’t practical to reuse software because the DO-178B safety standard requires that the entire system be specified and tested as a complete system and it is virtually impossible to break out modules for design or test. I brought up quotes from experts but the managers at the company ignored it. The result was that the development costs was at least an order of magnitude higher that it would’ve been if they didn’t try to save money by reuse. They also wanted to allow the customer to reload software in the field and I brought up a crash of an Airbus A400M that was caused by doing that same thing. Once again, I was ignored. My advice to you, is spend time talking to the older engineers. They may not be as up to date on the latest techniques, but they probably can give you some good tips on your craft.

@masskilla469

5 жыл бұрын

I agree and another part of that is that they are in a time crunch and money is also a issue!!

@eddievhfan1984

5 жыл бұрын

Which is why NASA did the smart thing with the Shuttle's Backup Flight Software (BFS) and had a separate software team write it, with the idea that any unforeseen bugs in the primary code wouldn't likely be duplicated in the backup code.

@CountArtha

5 жыл бұрын

I think that "tendency" is an adaptation that lets us conserve willpower. It's good to have a certain tolerance for risk so that we don't become a raving neurotic mess at the first sign of trouble, but it's also good to have a few people around who over-think everything. The hard part is getting them to work together inside the same organization without one or the other taking over the whole culture there.

The decision to drop the Hermes spacecraft was a big missed opportunity for the ESA, considering that it would have been operational by the time of the grounding of the Shuttle fleet. It would have meant that NASA/USA didn't have to go cap in hand to the Russians for a ride to the ISS.

@quoniam426

5 жыл бұрын

When considering Nasa difficulties with the Space Shuttle, it is a good thing ESA stopped Hermes project altogether. More classical spacecraft are just cheaper and more reliable than those shuttles.

@thesteelrodent1796

2 жыл бұрын

@@quoniam426 the shuttles could have been just as reliable if they were built properly, but between NASA bureaucracy, government BS, and lack of funding, there was just no way those birds could ever have been 100% reliable. The investigation into Columbia revealed that they knew the shuttles were poorly designed and needed to be reworked, but the way they did things made it impossible to get things done. ESA never made a flyable version of Hermes, but there's no reason to think it would've automatically been the same mess as the NASA shuttles. It was dropped purely because it would've been expensive to make it work, but given enough time and money it could've been perfectly reliable.

It saddened me so much when people went crazy over the Space-X rockets, as if humans hadn't launched payloads for decades. It's nice to see a video about the Ariane series for once.

@TheEvilmooseofdoom

5 жыл бұрын

It wasn't the launching that had people going crazy it's that landing and reusing the booster..

@TheSequentCalculus

5 жыл бұрын

I know, but the awe at seeing a rocket land then translated into people becoming interested not in rockets, but specifically SpaceX. It was as if SpaceX had invented rocketry.

@TheEvilmooseofdoom

5 жыл бұрын

Max Maria Wacholder No,but they have broken a lot of new ground and shaken things up in the industry and gotten people interested again. I understand though that these days with the hype it almost seems as though spacex are the ONLY ones launching rockets. :)

@patricks_music

2 жыл бұрын

@@TheSequentCalculus The Story of SpaceX is cool. And it is pretty awesome what they have made a common occurrence

When your flight computer can't count that high.

@gajbooks

5 жыл бұрын

You will not go to space today

@nathanaelvetters2684

5 жыл бұрын

They say space is hard, so you know that it's okay

@fatboyslim458

5 жыл бұрын

That your rocket just crashed into the ground, Never go to space today.

@witchofengineering

5 жыл бұрын

RUD and FTS will ruin any day Sometimes your probe will lithobrake Or burn up by the air

@Hans-gb4mv

5 жыл бұрын

When you can't go to space because your integer runs out of space.

Launch is happening now! kzread.info/dash/bejne/c2empLeilZy4nNo.html

@danielwilliams1672

5 жыл бұрын

Launch time is red sadly

@Veptis

5 жыл бұрын

It reset and now holds...

@scottmanley

5 жыл бұрын

Crickets

@mrnerdy3501

5 жыл бұрын

Countdown on hold :(

@Jerrycobra

5 жыл бұрын

hold hold hold

Don't forget BepiColombo! JWST may still be in development hell, but here's another interesting mission that's practically ready to roll out on the pad. All that's left is to wait for the launch window. Also, on the topic of the Ariane 5's reliability, I like to say: this rocket will get you safely to space even when programmed wrong and lacking a connection to ground control =P It's the dictionary picture of a workhose. Like a massive clydesdale that plods onward with stubborn, undepletable stamina, and has memorized its job to such a degree that it doesn't even need to be guided anymore.

Watching it live as we speak! I can hardly wait! Edit- After a 45 minute wait, there was a successful launch! I'm not sure what the delay was, but the launch went off without any further hitch! And they BARELY made the launch window.

@t65bx25

5 жыл бұрын

45 minutes later and still at red 7:00 Edit: The launch date was reset to 10:00 or 10:30

I'm all for fireworks on anniversaries, but hopefully not this one.

@quoniam426

5 жыл бұрын

The first A5 launch went kinda like in KSP, rocket flips over, boom.

@elliotwooley2630

5 жыл бұрын

I watched it live, they had to hold the countdown, but launched successfully

I remember the first time I saw the Ariane 5 in a popular science magazine, when I was a kid - I thought it looked sooo cool! I still do=)

So glad i found your channel Scott. Some of the best videos on youtube IMO.

It's not just the rocket. The Kourou Spaceport of which this rocket is launch located very close to equator and it's the best place for GEO launch.

@quoniam426

5 жыл бұрын

Hence why they have been launching Soyouz rockets from there for a few years. It makes Soyouz more competitive in delta-V requirement. Russian space centers are quite high in latitude.

so much knowledge in some many fields of science. love this channel

This is the last video I'm watching before I start Airforce Basic Training. Thanks for the awesome content Scott!

Hmm, and I always thought the largest thing sent to space was Buzz Aldren's ego. Wanted to be clear, this is not meant as a mean jab. Buzz used his ego to advance himself and the space program, so he was one of the very few people with super over inflated egos who channeled them for a good purpose. Lots of people have huge egos, most let them run rampant and are jerks to put it nicely.

@matthewerwin4677

5 жыл бұрын

Buzz earned his ego. He walked on the fucking moon for Christs sake.

@skavies2351

5 жыл бұрын

Not only did he earn it, he used it to advance NASA and didn't let it get him in trouble or blemish the space program. I think he was the greatest human ever.

The hypergolic stages were also used on the Quad gallileo launches. With the ATV retired and the initial phase of the galileo launches completeted this ES stage has now been retired. For ariane 6 there's no need for such a stage is that it has a restartable upper stage.

You said that Ariane was human-rated from day 1. Just a thought but any chance of a video explaining exactly what "Human-rated" entails given SpaceX and SLS are both, presumably going through the process at the moment? Is it just proven flight-capable, airtight and no human-squishing G-forces or is there more to it than that? It's a phrase that's used a lot but rarely explained.

@small_SHOT

5 жыл бұрын

If a rocket is human-rated, it is capable of flying humans. You’re welcome.

@tonas1997

5 жыл бұрын

Not an aerospace engineer, but there's quite a lot that goes into "man-rating" a rocket. The prime factor is reliability. Obviously, you can't really predict if (or _when_ ...) an accident will happen. Calculating risk is a harrowing job that takes into account each and every component of a specific rocket+capsule, and the way those systems interact with eachother. In order to achieve a specific reliability standard, you can come up with a buch of metrics, such as "times previously flown" (which is being used in the Commercial Crew Program). Next one is how well certain components are suited for manned flight. For example, the Constellation program was built around two launchers: the Ares I and the Ares V. The Ares I (the crewed one) consisted on a single stick 4-segment SRB that boosted an hydrolox upper stage, on top of which the Orion capsule was mounted. While SRB's are highly reliable - the _Challenger_ disaster occured because they were operated outside their safety margins - there are a few problems. There's one that caught my intention: an Air Force report found that, in the event of a mid-flight abort, the SRB fumes and reaction products would be hot enough to melt through the parachutes of the Orion capsule, at the time descending below the malfunctioning Ares I. Another example is how expensive it would be to man-rate the RS-68, which was to be used on the Ares V. And yes, the famous ignition fireball was a prime factor (IIRC, that's why the SLS, intended for both crew and cargo, uses the flight-proven and WAYYYYY cooler RS-25). There's also the question about g-forces, as you mentioned. I believe the current NASA standard limits those to about 3G. And we're just scratching the surface; note that these requirements only concern the rocket itself, not the capsule. That's a whole different shebang. Life support, operability, airtight seals, radiation hardening, reentry safety, heat management, etc etc. And it only gets worse if you want to go to deep space ;)

@Odd_Taxi_epi04

5 жыл бұрын

There are more details too. The Atlas V is also getting a new upper stage with more thrust for human rating, because the original one would give a too lofted trajectory, that would mean too high peak Gs in the case of a launch abort, for the capsule falling back to the earth.

@watcherzero5256

5 жыл бұрын

G forces, increased reliability (1/10,000 part failure may be acceptable commercial risk but you want for example 1/1,000,000 when lives are at risk. Finally fuelling, you want to minimise the time astronauts are in the proximity of explosive gases (byproduct of fuel and/or cryogenic) so you only fuel at the last moment, after the astronauts have boarded whereas for commercial you could fuel a day or two in advance, secondly liquid fuel is preferred as a liquid engine can be turned off if theres an issue wheras a solid fueled rocket once lit burns till it is exhausted.

@williamgreene4834

4 жыл бұрын

@@watcherzero5256 Only Spacex loads fuel after the astronauts are on board. Boeing will load fuel before the crew is on board and they use solid boosters which tend to burn the chutes off if you need to abort.

Watched this video yesterday and this very morning the Ariane 5 accident was analyzed during my software engineering class as an example of bad exception handling (and code integration). Looks like the episode really shook engineers up.

Here for the James Webb curiosity. A few days before the finally scheduled launch

@Fredrikaolsen

2 жыл бұрын

Oh yes

I haven't even watched the video and all I want is a bigger version like the Delta IV Heavy or Falcon Heavy called the Ariane Grande.

Hey ! I lived there until my 19 years ^^ Really nice to have rocket launches almost every months :P

@kettlehead8994

5 жыл бұрын

Good luck for you

Thank you for this much desired video. Vulcain, Ariane's Single Engine and upcoming Vulcain 2 are interesting engines too.

@quoniam426

5 жыл бұрын

If you come to Paris, at the Arts & Métiers museum, you can see a Vulcain engine on display.

Slightly unrelated but I remember that story about an accident on Ariane 4 caused by a rag later found in a pipe (most likely forgotten during assembly). Obviously the company making the equipment the rag had been found downstream of was the nb 1 suspect but in the end they were saved by the fact that all the rags they used happened to be the same color and the one having caused the accident wasn't. Sometimes the most trivial things can save your ass.

6:42 his face says it all when you have a bad day at work!

Hope the James Webb space telescope launch doesn’t blow up

@zoidburg2975

5 жыл бұрын

Aluminum Oxide I hope it does!

@TheOneWhoMightBe

5 жыл бұрын

You're assuming that the JWST will ever be launched. ;)

@Vulcano7965

5 жыл бұрын

the worst that can happen at this point with A5 is, that it will end up in a slightly different orbit.

@TheOneWhoMightBe

5 жыл бұрын

Vulcano; now you've done it.

@arkitect5692

4 жыл бұрын

Hope the James Webb space telescope launch*

I remember watching the first Ariane 5 Rocket blow up and I was also watching live and living in FL at the time when Space Shuttle Challenger failed

@johnfrancisdoe1563

5 жыл бұрын

QALibrary STOP WATCHING ROCKETS! You're a jinx.

Happy 100 launches Ariane 5 , i gues

Looking back on this to see what's taking the JWST out there. Cannot wait. Hoping for success.

6:43 tfw your rocket explodes

@garageflower7154

3 жыл бұрын

He does NOT look happy haha

8:11 "If you've got the money". Great, now I can't stop thinking of Welcome to the Jungle as the Ariane 5's theme song.

@nerdcm355

5 жыл бұрын

Sam Ferguson I agree

@catfish552

5 жыл бұрын

Pretty fitting, considering the launch site.

AIUI, the Hermes project was cancelled mostly because it was getting too expensive. ESA had 3 big projects going on at that time: Ariane 5, its own space station and Hermes. The member states were unwilling to pay for all 3. Ariane 5 got priority, the space station morphed into the Columbus module for the ISS and Hermes was cancelled. In 2021, one of the few bits of hardware designed for Hermes that actually got built (the ERA robotic arm) was finally launched with the Nauka ISS module.

I was speaking to a guy that spent years building an instrument for one of those satellite that flew in Ariane 1. The research and development team all sat around with champagne celebrating the launch only to watch it explode and realise all thatwork has gone up in flames... I don't think anyone went home happy that day...

@guilhem3739

5 жыл бұрын

glenwoofit you mean ariane 5?

@glenwoofit

5 жыл бұрын

@@guilhem3739 Yeah I ment the first flight of Ariane 5. I was thinking like they did for the space shuttle ie. STS 1, STS 2 ECT.

October is another busy month for launches. I hope none are ignominious.

This is regarding the Ariane 5 VA252 flight, which occurred on 18/19 Feb 2020. I am from Sri Lanka. There have been several reports of sighting of a "comet" (or something look like a comet) in the sky, at around 4.30-5.00 am (local time, GMT+5.30), on Feb 19. Some people claim this to be a comet, but I don't think so. Because comet usually doesn't appear out of nowhere. When comets appear, they can be seen for weeks or months. But this thing only appeared once and since it was only sighted in the pre-dawn sky, I think this was something in the orbit, just like a satellite, which was illuminated by the sun. But this had a tail (like a comet). So I wondered this must be a rocket stage, firing on orbit, exhaust plume was illuminated by the sun, creating the tail. And for my assurance, there was a rocket launch an hour before, Ariane 5 VA252, launched from French Guiana, 23.20 PM, Feb 18 GMT (3.50 am Feb 19 Local time). But according to its flight, there was no on-orbit restart of the second stage. After the first stage separation, it was a continuous burn, for GTO insertion, until T+25 mins. At about T+30 mins, payload separation occurred, just passed the east coast of Africa, over the Indian ocean. Live coverage didn't show the rest of the flight. According to my knowledge on rockets, I assume there was a deorbit burn or propellant venting for passivation of the stage, which I hope occurred over the Indian ocean, So that is what Sri Lankan people observed in the pre-dawn sky. I am asking you, whether you can confirm my idea if you know about the flight of the Ariane 5 flight VA252. But there is a question. The achieved GTO was 250×35,786 km with 6 degrees of inclination. When the payload separation occurred, it was moving at 8.5 km/s, with an altitude of 1600 km, rising toward the apogee. Which makes it a fast-moving object on the sky. But observers reported that it was not a fast-moving object, it was slowly moving through the Libra constellation, 40-50 degree altitude, at SSE direction. I thought if the deorbit burn or propellant venting has occurred near apogee, where it is in a geosynchronous altitude, it would be almost stationary to the ground, But apogee is not over Sri Lankan sky. And I don't know whether engine burns or propellant ventings at GEO altitudes can be seen from the ground like LEO objects. So I am kind of confused. If anyone knows about the flight of the Ariane 5 VA252, help me to understand this.

I did my practice as an automation engineer at Volvo Aerospace in Trollhättan, Sweden, where the bells for the Ariane were manufactured in the early ninetees. Is was a fashinating comtraption of tubes that made it up and even more difficult to weld them toghether. I wonder how the main engine is constructed these days...

The French space engineer in me is squealing. Also fun fact: I visited Airbus main factory in Toulouse, France, just a few hours after this fail launch you mentioned. Back then the reason wasn't identified, and the mood was... gloomy at best. Then they found out a guy had just punched in the wrong numbers.

Back then in the 90's i was still a engineering student. Part of the education was visiting Alcatel Kirk where they proudly told us about how they had designed digital filters for truster control on this new upcoming rocket. Years layer they had filled the canteen with big screens and champagne live celebrating the launch. I would have lived being a fly on the wall watching their faces when the rocket blew up.

@filanfyretracker

5 жыл бұрын

A little company called Hughes Optical in my home town ground the Hubble mirror, I can imagine they had similar feelings when the images came in blurry.

I hope that they finally get their shit together soon and make a capsule for the ATV.

And now we are here. Almost. The JWST is go.

In June 1996, I'd just finished my interview rounds with ESA in Brussells (payload systems), and was given the nod to expect the offer the following week. Then Arianne 5 happened. They put a freeze on hires and fires until the review process was completed. I took a job in financial services on the other side of the planet. If only.

Dude you were like within a few miles of where I live! I wish I could meet you

Nice Video 👍

Anything on the Hayabusa2 mission? Like the fascinating pictures from the surface.

it's surprising how often it's overflow errors that cause catastrophic errors. considering how simple they are.

Please talk about the long march 5, two launches and one failure, both had first stage engines related problem

Ariane is beautiful.

We learned to fly no so long ago, and now Ariane will make its 100th launch!

The solid boosters stop at around 2:20 minutes at a speed of 2020 m/s interestingly not very far apart from Space X main stage cut off at around 2:33 minutes at 2250 m/s, recovering the most expensive main Vulcan engine will be much more difficult since it final speed is close to orbital speed at approximate 7 km/s with all the reentry heat associated it will require a very interesting system (project Adeline)

@darkellysio

5 жыл бұрын

nuno pinheiro but ariane doesn’t lift off at 0:00 but 0:06

@quoniam426

5 жыл бұрын

@@darkellysio Just like Space Shuttle didn't take off on the spot, they wait till the cryo engine hits nomnial thrust before switching on the SRBs.

@darkellysio

5 жыл бұрын

Quo Niam what I’m saying is that comparing space X time and Ariane time doesn’t make any sens considering that 6 seconds delay

In our company we have a work table on which the head (top part) of one of the Ariane’s was lathed. IDK which one though.

When I found out Ariane 5 was going to launch JWST I was quite frustrated cause I thought why bother when we got falcon heavy, but turns out it is way more reliable than falcon and efficient. As soon as launch was over kept hearing increasing in mission duration estimates and praises for Ariane for a perfect launch.

@martinisbutik

9 ай бұрын

The fairing of Space X Falcon is also too small for JWST.

God I absolutely cant wait for the James Web space Telescope :D

so do you think they'll reuse the software from 5 on 6?

6:58 - So they could have chopped out that routine entirely and saved even more RAM, CPU cycles, and HDD space!

great vid ...peace out

ariane 5 is the best launcher available on the market in my opinion

@nathanaelvetters2684

5 жыл бұрын

For a geostationary satellite, usually yes. If you're a cheapskate or if you're going to a lower orbit, not so much.

@Psychonau

5 жыл бұрын

why? falcon heavy had only 1 launch and that was a testlaunch with a test payload, you can can´t compare that to 98 succesfull launches of the ariane 5

@josephgroves3176

5 жыл бұрын

Iraqi.Basrah ١١سنه ملحد better PR more like!

@Pete292323

5 жыл бұрын

Apart from the Soyuz the safest launcher. Enough said.

@davidedippolito6770

5 жыл бұрын

@@Pete292323 yes but ariane 5 is the best launcher for gto

My French isn't the best but 'jettisoning the fairing' appears to translate to 'loose the hair'

@sylvaincamus4985

5 жыл бұрын

it's not losing, it's rather "dropping" or "ejecting" but yes it's called "coiffe", that can be translated to "cap"

Hey, cool video but unlike you said the Ariane 5 only has 1 active version now, the ATV was retired in 2014 and the Ariane 5 ES (hypergolic 2nd stage) has been retired in July with the 4 latest Galileo navigation satellite.

The Cluster satellites (the newbuild ones) still operate btw. and also posting pictures of earth from time to time.

Probably not you and probably just me not hearing many people with your accent - but the voice over at the start of the new Sea of Thieves update video sounds so much like you... time to go rewatch the fountain war vid now :p

Didn't a well-known video-sharing web site have a similar overflow problem, when one music video achieved more than 2^31-1 views? Though I don't know why signed arithmetic was deemed necessary ;-)

Scott Manley, can you talk about possible moon fly-by trajectories of the #dearmoon trip? Elon mentioned going fast and close on the approach and then having a wider kind of return arc. How does this compare to Apollo 8 and 13 etc. Thanks, always great stuff from you.

One of the problems with the Hermès shuttle was also when they realized they had to add an emergency escape system to it. This severely reduced the payload they could launch with the rocket... =/

Reminds me of the Space Shuttle

You should try building a stock particle accelerator in orbit on KSP to launch a shuttle!

Scott, when will you be doing a video about the final launch of the Ariane 5? It flew yesterday.

Why don't You make a video on the italian Vega C Rocket?

@streetwind.

5 жыл бұрын

He probably will once Vega flies a hundred times ;)

@riccardobossi5907

5 жыл бұрын

@@streetwind. ufff, then I think It will take quite a while

@HMSJankoekepan

5 жыл бұрын

I like the Vega rocket. Just a single SRB at stage one, two and 3. Takes off like an arrow.

@riccardobossi5907

5 жыл бұрын

@@HMSJankoekepan i know, plus, since I'm Italian, there's the proudness factor that adds up

@HMSJankoekepan

5 жыл бұрын

@@riccardobossi5907 Haha you should be. I should've said it takes off like a Ferrari :D

"In a few hours!" Time-zones sure are weird :P

@scottmanley

5 жыл бұрын

Wasn't able to post the video right away....

@miniman3112

5 жыл бұрын

@@scottmanley Haha no worries. Looks like it might be hours after all if that clock stays red...

2:16 That safety tape.

Scott, at 3:50 in your background is a blue-hulled, square-rigged sailing vessel, would you happen to know the name of it?

I was watching the launch live on KZread

Omg so they diverged the software on a Cluster launch... was that a cluster fork?

countdown is on HOLD right now D:

Honestly, Ariane 5 is one of the best looking rockets.

Whats that a kind of bridge and nice blue square rigger behind Mr. Manley?

Right by the Fruitvale Bridge.

@Streber2000

5 жыл бұрын

Thank you! I was wondering which bridge this is. Nice sailing boat as well 😀

About these stroll videos I always imagine Scott has a belt with his talking points strapped around his belly.

What a CHONKY BOI

can someone answer this question - he said when both flight computers shut down the flight had to be terminated. what actually does that mean? was it purposely blown up like that? is there an abort sequence that they can press when they realize the rocket wont work properly that just self destructs the rocket? im assuming they do this so it wouldnt veer off course and instead blow up in the air causing less damage? if so, how do they blow it up?

Scott what fuel do Satellites use to adjust and spin? Do they just use air to spin and adjust or more complex things like ion thrusters? Also i remember they did a test back in the 80's for electrical charge in space and the cable charged and broke off did they ever figure out how to use that energy in space? One more question is a Thorium Reactor something they are considering?

@DC2022

5 жыл бұрын

Usually it's a combo hypergolic fuel (mainly MMH)/nitrogen tetroxyde (N2O4)

@masskilla469

5 жыл бұрын

Thank You!! They did a test back in the 80's for electrical charge in space and the cable charged and broke off did they ever figure out how to use that energy in space?

Never used to be able to watch your videos because of the heavy accent, now I like it as much as the content haha.

Same problem appears e.g. with linux dependencies, when glibc turned out to be exploitable in 2015, nearly everything in Ubuntu used it. Or systemd on debian, grown so complex over time, has it now become a security concern.

My name is actually Hermes! I thought you would never mention this esa endeavour!

Question regarding geostationary satellites- how much extra delta v can it take to do that inclination change at apogee if you didn't launch from the equator? Especially if you combine it with the perigee-raising burns, I feel like if you add the vectors it can't be too significant an increase.

@nathanaelvetters2684

5 жыл бұрын

Think about KSP- you could zero the inclination then circularize, which would be maybe 100m/s extra, or you make a maneuver node and burn mostly prograde and a bit normal for only a little longer.

NGC better make sure their payload adapter for the JW telescope works. Wouldn't want another Zuma incident :)

@oldfrend

5 жыл бұрын

personally i give the webb a 50% chance of a flawless orbital insertion/commissioning phase. it's already so complex and so behind schedule i think it reasonable someone will cut a corner or just plain miss something that will cause a failure somewhere. maybe not fatal failure, but failure somewhere.

Hermes haaa... un doux rêve irréalisable ^^

I think there's a SCRUBB(?) or Delay of some sort, the T- is Red and stuck at 7:00.

@guilhem3739

5 жыл бұрын

Did you update your ios to ios 12? I have myself that kind of problem since I made the update ...

@1224chrisng

5 жыл бұрын

@@guilhem3739 what? why would Arianespace be using iOS on their livecast

Let's suppose you're writing a really important letter to a colleague...

If the 100th launch fails it'll be the biggest lolcow of the century.

5:36 - Why didn't they have the software designed to simply saturate (hold the number at its maximum value) in the event of an overflow, instead of rolling over? Seems to me that, with control software for a rocket, the effects of having one of the parameters saturate could not possibly be worse than the effects of having one suddenly roll over to zero or to a large negative number...

@scottmanley

5 жыл бұрын

That’s not how Ada works

@vikkimcdonough6153

5 жыл бұрын

How so?

@scottmanley

5 жыл бұрын

ADA throws exceptions when you look at it funny.

Overflow damage actually helps in rl too lol who knew

Can you make a video explaining minimum inclination. I dont get why it would happen.

Nice overview. Does anyone know if the Ariane6 is expected to be mantated/ratable? So far I have seen no public statements about it at all either way. As it is largely based on Ariane 5, it may not be to hard to do. But as it is build to reduce cost, and ESA has no real plans to fly poeple (other then the IEX program and an investment in dreamchaser by DLR), it may have been forgone to save money.

That feel when you just copy and paste code you don't really understand on a multi-million (billion?) dollar project.

I'm watching late 2021 trying to find out about the Ariane 5 before it takes JWST up in just a few weeks.

KZread just suggested this video as soon as the Vega from ArianeSpace failed on july 2019....

1:29 was that scott signing up to be a steely eyed missile man?

7:47 - Carp, _revert to VAB!_