How does SpaceX’s Dragon get back to Earth from Orbit? How exactly it re-enters and lands!

Avaldati 2 aug 2020
How do you actually get back from orbit? Do you just pump the brakes and fall right out of space? Well, there’s a lot of fun physics involved in deorbiting and today we’ll do a summary of how you deorbit, go over the hardware that allows the Crew Dragon Capsule to reenter and safely splash down, we’ll go over the sequence of events and even the exact conditions that need to be met in order to allow for a safe reentry.
00:00 - Intro
03:10 - Re-Entry Criteria
05:30 - Crew Dragon Re-Entry Timeline
12:35 - Hardware Overview
25:10 - Orbital Mechanics Rundown
29:30 - Summary
Article Version (Written by Alex Crouch)
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  • Timestamps: 00:00 - Intro 03:10 - Re-Entry Criteria 05:30 - Crew Dragon Re-Entry Timeline 12:35 - Hardware Overview 25:10 - Orbital Mechanics Rundown 29:30 - Summary

    • @Peter Davis à

    • There was timestamps in the discription, means you copied it

    • Why deorbit burn is crucial? Before landing to the earth

    • @Joosep Kaha 😂 good one

    • Really useful bro🥰 nd u got pinned🤩

  • What engine does the cargo dragon use to deorbit?

  • Question: do the astronauts feel the heat during re-entry?

  • So they can land in florida

  • I just watched dragon undock crs 21

  • 30:00 I didn't know Queen Elizabeth did orbital mechanics for NASA

  • thank you for sharing your information

  • The slippery sack relatively expand because cold macropharmacologically like to a needy volcano. uneven, lying kohlrabi

  • This channel has started my love of space honestly I only just started watching your channel And already I have learnt loads of things keep up the good work

  • The unruly coat expectedly slow because step-father spindly owe than a berserk bee. loud, nondescript growth

  • The large playroom initially peep because grandmother ganguly punch failing a helpless accountant. teeny-tiny, observant leopard

  • "So they're either on or they're off." Yeah, but... so are things that _do_ throttle, having some middle ground between off and _fully_ on.

  • How much is 300 x less? 1 x less is zero.

  • The harsh september gratifyingly owe because kitten dimensionally signal via a careless monday. nifty, super community

  • The tranquil chair externally jump because delivery conjecturally care modulo a capable town. used, gray greasy great gray

  • will the new spacex starship be able to "fly" through the re-entry and not need a heat shield?

  • Instead of hitting the nail on the head you are like blah blah blah just to extend such a short explanation.

  • How th did i watch through a 30 minute video on space de-orbiting! Im definitely out of this world!

  • The best grade muhly roll because angle rhetorically sin past a rigid cap. coherent, tidy staircase

  • How long does it take to come to earth?

  • The alcoholic odometer analogously marry because august remarkably smile like a adventurous value. picayune, pointless brother-in-law

  • I’m watching after bob and doug made it back, in fact I’m watching after sn8 flight

  • @erydayasyronaut or @everydayastronaut Good schtuf! I woke to search for your 2nd try at SN8 first flight... then you apparently told us to watch this video. I'm am so down with re-entry info! God Speed SN8 !! (PS.. when is your 2nd try SN8 scheduled? ) I know..."...when is time!"...?

  • Like you said it takes 15 minutes to de-orbit the capsule. That's why they jettisoned the trunk first because now it lowers the total mass of the vehicle that the thrusters have to deorbit. If they did not jettison the trunk it would require more fuel and more time to do the deorbit burn. If it takes too much time they might have to do another phasing burn

  • Space Doesn’t Exist You ALL R BEING LIED TO

  • wow next year they will be back

  • The calculations today are similar to what was done in the 50’s. The advantage today is that computers are better at repetitively run calculations at high speed. So calculations can be more accurately updated in real-time.

  • OMG great video

  • It's always bothered me that with all the thousands and thousands of names Musk could have called the craft, he choose "Dragon!" Funny how these craft are named, say "Apollo, Saturn, Osiris" they seem to belong to the same group, so-called elites!

    • Josey Wales You guys see conspiracies in everything, don't you? I can't imagine what it must be like to be scared and suspicious of all around you. Sad.

  • Please take me

  • Timestamps: 00:00 - Intro 03:10 - Re-Entry Criteria 05:30 - Crew Dragon Re-Entry Timeline 12:35 - Hardware Overview 25:10 - Orbital Mechanics Rundown 29:30 - Summary

  • Hi, um dont you think world scientists are looking at your videos and borrowing ideas to make long rage missles.

  • Will the Crew Dragon astronauts have a harder time aclimating to Earth's gravity since theirs is a six-month mission?

  • Point retrograde, fire engines, open parachutes at 3000 and there you go xD

  • You don't need a rocket to get into space 👺🙈👤

  • Very good explanation. I subscribed. Happy T-day, by the way!

  • This presentation was pure "space- tech" candy to me. Good stuff.

  • First time here Tim and I need to say that I loved your video. You have a new subscriber. Great Job!

  • TLDR: Pick the landing spot, check the weather, check it again, then burn retrograde.

  • Probably a stupid question, but... lol. Around 21:30, what is the tall mound of earth to the right side of the screen? Stone Mountain in GA?

  • 感恩节: 感谢自己认知总是真实 感谢父母养育了自己 感知世界总是在向好的本质 感谢天地赐予的食物 感谢社会让自己充满了兴趣激情 感谢自己猫狗鼠鸟鱼……让我更具有生命的意义 感谢互联网让我总是认知的真实可以有实现的可能。Everything happens instantly without a sense of time and space.

  • 3:57 Tim, 25 dBz refers to the intensity of the reflection in the Doppler radar. It's a logarithmic scale that represents the volume of precipitation per volume of air.

  • 3:57 Tim, 25 dBz refers to the intensity of the reflection in the Doppler radar. It's a logarithmic scale that represents the volume of precipitation per volume of air.

  • On another subject... What if an astronaut up on a space station for 6 months...get ill? What if they get appendicitis or a heart attack or something like that????? Any answers????

    • Joolz JAL Astronauts are screened for health issues to minimise those but that's a good question.

  • Ive always wondered how this works, nice presentation!!

  • Timestamps: 00:00 - Intro 03:10 - Re-Entry Criteria 05:30 - Crew Dragon Re-Entry Timeline 12:35 - Hardware Overview 25:10 - Orbital Mechanics Rundown 29:30 - Summary

  • I totally upload fun and crazy videos check them out

  • You got it up before the reentry. With only 5 hours to spare

  • Wow. I watched the entire 30 min.

  • Informative this is....thanks....

  • A moment of silence for the Trunk left to burn up

  • Probably the same way they have been doing it for the past 60 years.

  • Too complicated explanation :(

    • @Everyday Astronaut don't mean anythihg in a wrong way. yur video content is Super but fir a not-so-geek person perhaps you cud try using simole anatomy!! I do appreciate your stuff & its very interesting 👍

    • Unfortunately orbital dynamics, reentry heating and physics is very complicated but I tried my best to explain it. Let me know where you got stuck and what was difficult so I can help make future videos more useful! 👍

  • I have looked at a lot of videos about colonizing the moon & Mars. And I haven't found any with my same ideas. I think we should set up a moon colony on earth. We should have inflatable domes, which we cover with 3D printers with simulated moon mortar. The domes should be connected to each other by inflatable tunnels covered with simulated moon mortar. There should be living quarters, hydroponic green houses, gardens with garden soil for recreational gardening, a 5 acre pasture with one inch of garden soil and one inch of grass turf, a park with artificial turf and with small sections of real grass turf, and maybe even a very small zoo. All the domes will have plastic floors so no water is lost. Condensation forming on the ceilings will be drained into the water supply. All the domes will be blown up with compressed air from earth and will have a refresh system, which will refresh the air and maintain the air pressure. Humidity, Temperature will be maintained by humidifiers, heaters, fans and coolers. Light will be provided by multi-color LEDs, mostly white. Power will be supplied at first by solar power, and later by nuclear or fusion power. All water will be re-cycled, almost zero loss of water. There will be a bull, a cow, two sheep, and two goats, two chickens, two turkeys, two fish, and two rabbits. There will also be pets, two dogs, two cats, two bunnies, etc. (and maybe a small zoo) All of this will be set up by astronauts and robots before the colonist arrive. The first colonist will be 5 fathers and 5 mothers, and 90 babies. The parents will be good parents, gardeners, farmers, zoo keepers, teachers, etc.. During the first two years an exact duplicate facility will be built on the moon. When the babies are two years old, they will move to the moon and live on the moon. Or if it is proven that they will be too young to travel to the moon than the facility on earth will be added to, to accommodate 10 more parents and 90 more babies. The two year olds would move into the new addition. Every two years the facility will be either added to, or 100 people will move to the moon. This plan will allow the kids to grow up in the isolation of the colony, and will make it easier for them to live in the isolation of the colony on the moon. And will allow them to grow up on the moon and be better able to adjust to the lower gravity on the moon, although some artificial gravity maybe eventually provided. This artificial gravity will especially be good for the parents. The kids will have everything in the facility to keep them occupied and entertained. Also they could have some books, movies, games, etc., especially adapted for them, being careful not to give them anything that would make them feel isolated. After 20 years there could be 2000 people living on the moon, most of whom grew up on the moon. This program could be speeded up so in 20 years there could be 4000, 6000, or 8000 people living on the moon. This program could be simultaneously done to colonize Mars so we could have 2000 people on the Moon and Mars at the same time. For the moon we could send supplies every month, but for Mars we could only send supplies every 26 months. So I suggest we send 10, 20, or 30 rockets to Mars every 26 months all at the same time. We could have several refueling stations along the way to mars and orbiting mars so rockets could refuel along the way to mars and right before landing on mars so the empty rocket would have enough fuel to take off again, refuel in space and return to Earth. Eventually the colonist could grow trees, bamboo, and other plants for raw materials that could be used for making things. Eventually the moon and Mars could export minerals or small expensive items that were assembled on the moon or Mars, like jewelry, iphones, iwatches, etc. Or grown on the moon like caviar, marijuana, etc. What do you think ? :-)

  • Poor narration, like a 4 yo retelling a story.

    • I look forward to your videos where you can talk and script whatever you like! 👍

  • Nice tshirt, where do we get it ?

  • You’re show would be cool if it wasn’t about you. Why does the majority of the video have to be a video of you? Super disappointed

    • Because there’s not a ton of good B-roll despite us adding as many graphics as we can. If you think this is bad, don’t watch an old video 😳

  • Q? with the amount of satellites and space junk debris floating around, how do they pick the re-entry trajectory to avoid collisions?

  • I like the fact the this capsule uses 4 parachutes. That redundancy adds more safety. Have you noticed that the Russian capsule uses only one parachute? Does anyone have accurate info as to why?

  • Wow first watching this show this guy is good explains it for in an easy-to-understand way I'll be back for more

  • So the nose cone is closed after the vehicle is committed to entering the atmosphere. Now just suppose there was a problem with closing the nose cone, then what?

  • The music is so distracting...great video, but I had a hard time paying attention because of the music.

  • Amazing you have made me have so many questions, that I now need to be answered before I will be able to sleep with them running through my head... How many thrusters and types of thrusters does it have? How many pounds of thrust does each type of thruster have? What type of fule dose each thruster use? How much fuel per sec does each use? What type of ignition of fuel is used in a vacuum? How much of the igniter is used for each ignition? How much igniter is carried on the capsual? How much fuel does the capsule hold for docking and landing?

  • Thank you Plasma. Plasma makes of over 99 percent of all matter. True, as I see it.

  • I love this channel and can’t get enough, I have questions, what is this craft made of, I’m well aware of metal kindling temperatures - steel 1600 degrees - aluminum 660 degrees - Magnesium 650 degrees How is this craft resisting 1900 degrees for over 6 minutes without melting into molten metal? Also how does this craft plot a route back to Earth as is clearly spinning at approximately 1000 miles per hour? Please excuse my ignorance on the subject, I don’t know much about it, but fascinates me. Keep up the great work. Cheers!

  • nice tele

  • I live in Pensacola and we're pretty excited that they'll be splashing down on our side of the state and in our "backyard" ❤

  • OK... so why can't they use the super dracos to assist the atmosphere slowdown, adding a bit of controllability to that phase?

  • Lifting bodies are a thing! ;) Look at the opening for "The Six Million Dollar Man' for a look at one! ;)

  • truly astonishing and comprehensive description, well done, and thanks to your patreon supporters too!

  • Um, isn't this Will Wheaton, the kid that was on Star Trek the Next Generation?

  • Great breakdown,, but it’s so obvious that SpaceX could safely land on land. Why not?

  • Could re-entry plasma gas be redirected and used as reverse trusters?

  • I still can't get how those engineers of the 1950s managed to calculate all these with a computer that's as powerful as a calculator!! I mean were they even human??

  • Wish you would quit using meters and kilometers and use mph and feet so I could get a sense of distances and speed.

    • We always put the imperial conversion up on screen so you still can get that. Our audience is only 37% from the US, so we’re actually the minority.

  • TLDR; Space-X replaced Draco engine valves with burst disks for safety after Dragon capsule explosion. No valve means no throttling. No throttling means no draco assisted “soft landing”.

  • 29:31 - 29:38

  • 19:00 so thats why my farts are warm. nice

  • For all the technology advances this seems primitive compared to some of the star wars ships and other intergalactic movies.

  • can you send me the link for the dragon 1 model not dragon 2 dragon one model im talking about the cargo one

  • Awesome explanation. Thanks

  • I love your videos, as your passion for space flight is revealed throughout. Excellent research and educational presentation.

  • The de-orbit thrusters are the 4 thrusters in the nose that are under the nosecone. That’s why the nosecone stays open throughout the de-orbit burn.

  • So, why the re-entry has to be at speed? Why not stop at point you want to reenter and simply drop down?

    • @Mystery Scoop In a vacuum, with no air resistance, it would take more fuel to come to a stop than it would in the atmosphere. Going from 17,500 mph to zero would require a lot of fuel, fuel that would have to be flown up on launch. That means that the launch weight would be much higher, so they would need more fuel and engines just to launch.

    • @Mystery Scoop Decelerating from 28,000 Km/h to 0 Km/h needs a lot of fuel, that fuel has a lot of weight, that weight has to be added to the rocket at the time of launch. So, you would have much heavier rocket at launch, and you would also need much more powerful rockets, and much more fuel (because you need additional fuel for stopping in orbit, plus additional fuel for launching additional weight of that fuel, plus additional fuel because of additional consumption of bigger rockets needed to lift all that weight.

    • @ArKritz84 i thought perhaps in vacuum you’ll need much less fuel compare to lift off... just saying!

    • You'd need as much fuel to slow down as to speed up (ok, kinda). And Dragon does not have the privilege of having a Falcon 9 rocket attached to it anymore.

    • The fuel requirements would be outrageous.

  • Another great one Tim. Thanks!

  • h

  • Love your work Tim! My favorite channel btw

  • awesome

  • use high rpm flyweel to keep the 2nd stage in the right orientation

  • 형 영상 너무 많이 봤더니 점점 잘생겨보인다

  • I appreciate that parachutes work, but also know that thrusters work great for Falcon boosters....

  • Trunk jettison before de-orbit burn ensures the truck doesn't come down ON anyone waiting for the capsule, not just keeping it from being in the same reentry profile as the capsule.

  • You got same guitar as me. SX haha

  • Like I had mentioned in another vid I’ve been sponging your content. Came up with a question you may direct me to and I’ll rewatch the draco video and why it’s not propulsively landing on Earth or Mars. Would the chutes work as well on Mars? Would the Draco capsule even go to Mars? Seems like propulsive landing and dialing them in would be critical to other planetary landing.

  • Its weird and a bit sad that the capsule have no Windows...

    • Well, it does, so that helps.

  • I like how you globe changes depending on what you are talking about When you talked about the mars rovers it was mars And now its earth :)

  • If dragon did land on…well…land, could it fire the about motors to use as retro rockets? (Edit: like the chutes did deploy. So similar to the Soyuz)

  • Great informative Vid, but that Music kinda want's you to get the Glock out !!!!!

  • Here is a somewhat non related ? How did they work out the orbital velocity for OsirisRex satellite to orbit Bennu (asteroid) I get that it’s hard math but what would they need to know to get it right before they even attempt to do it ?

  • The level of safety that SpaceX and the Orion capsule are being held to is eye opening. Makes me wonder what else NASA was kinda deciding not to check or change on the shuttle just to keep the budget.