To anyone who doesn't understand .... a lot of that in the comments below. I will quote myself. "Do you actually understand what a sonic boom is and how it is generated? For example did you realize that a sonic boom followed the route of the Concorde while it was supersonic, anyone in the path of the Concorde would hear a sonic boom as it flew overhead all the way across the Atlantic ocean. You have to be making a noise to create a sonic boom. And you have to be supersonic for that duration. The Falcon booster is supersonic during it's re-entry burn AND making a noise in the upper atmosphere. That sonic boom arrives after the booster has started the landing burn. The simple igniter system does not create that noise. Watch a few static fire tests and let me know if that igniter makes that noise. Please remember that the sonic boom travels at the speed of sound, and will always arrive after the creation of it. Cheers" Mr Mullett.
Unassisted fall from above the atmosphere, not dropped out of a plane. After the initial entry burn at the top of the atmosphere a first stage is slowed to roughly 1650 m/ps. The drag on entry burns off a considerable amount of that speed but it only drops below 343 m/ps (sub sonic) when the final landing burn starts. Until that point it's still traveling at over 500m/ps. These are easily verifiable numbers. Just because you don't believe it possible doesn't make it so.
The best view. It looks very cinematic, surreal and beautiful. Not to be morbid or anything, but it also made me think that that's what it would look like to watch icbm's (nuclear missiles) slowly enter a country's atmosphere before exploding.
Flatard there are now over a thousand films on YT from a thousand different viewpoints uploaded from a thousand different people,go back to your CGI world and enjoy your cyber sex
These reusable rockets are very awesome cool powerful. They are only putting more cameras in sky and all of them are pointing back down here on earth. Hopefully they will be used truly for all mankind to benefit and not used as tool for espionage practical domination of the humans whom made them in the first place.
There is not one single sonic boom when the aircraft breaks the sound barrier. Every aircraft traveling faster than Mach 1 generates a continuous shock wave that will lay down a carpet of sonic booms. That carpet can be fifty miles wide. On the ground, we only hear the double-sonic boom once as the shock wave passes over us.
The Audio is actually desync. The Speed of sound is about 340m/s at sea level, light speed is 299 792 458 m/s. And there is no way that any one is with in 340 m of the rocket so it would be impossible for the sound to match what you see. You can even see it in the videos some of the camera men recoil when the boom actually hit them, others actually acknowledged the rocket landed before they even did visually
Yes it's out-of-sync with reality but in sync with the video being presented. I think it's more immersive (although unrealistic) to see the explosion and hear the audio at the same time. Just like the movies! :)
But the explosive sound is not from the engines igniting but the boosters flying down faster than the speed of sound, creating a sonic boom. What's cool to me is that each booster actually produces three sonic booms because of the surfaces of the engine, leg mounts, and grid fins each create their own.
The sound is in sync with the rocket but not the crowd. This adds so much more as now I know where the sonic booms were, the visuals made much more sense.
What manchId is saying is that the sonic booms actually occur much BEFORE the engines ignite (when you start hearing the engine crackle is the ignition and burn), so the synchronization is still late by ~8 seconds (for the clip at 1:05). In other words, while the sync in this video is trying to present the boosters' frame of reference, it's actually presenting a frame of reference ~8sec * 343m/sec = ~2.74 kilometers away (or 1.71 miles), probably about halfway between the camera and the boosters in that specific clip. Check out this video for an accurate synchronization: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE--lYVPBAyiE8.htmlm50s
I was in Brevard county in a Day earlier,Wished,I had knew,this was the next day,I woulded stayed overnight and see those rocket took off and I didn't expect this,I missed it DAMM.
bernhardtsen74 no, the audio is clearly de-synced. If iwas synced the sound would arrive much later. Do I really have to explain this? Audio has been de-synced to match the images seen. Dumb.
Graeme Cooke The sound does come much later in these videos, varying depending on the distance from the landing site. The sound has nothing to do with the final engine burn. It's pure coincidence that they are synchronized. The sound is coming from sonic booms.
Ummm, clearly you don't understand what the discussion is here. The sound is desynced from what was recorded at the camera. If you do this you will end up confusing little kids and dumb adults as to what really happens at a launch.
Please fix the audio!! People who don't know what's going on get so confused. And then it's even harder to explain to them the mechanics of the sonic boom, and why the boosters are already on the ground before you hear them.
Lol. Go watch other videos of the same landings with proper audio and then you will understand what I'm talking about. You are correct that light travels faster than sound. So even you should be able to figure out that you shouldn't hear the sound at the same time you see the engines light up. And I'm the one that needs to go back to school... Education is important my friend. I suggest you know what you're talking about before you belittle other people, who are actually correct.
It is such a pity, but very common, that some people cannot simply STFU and look and listen to what is happening without yelling, cheering or generally making their own noise.
I have seen and heard from other posts that the bang you hear is a sonic booms. They are not , they are the igniters on the rocket lighting the fuel and the combining of the fuel. So much wind pressure on the bottom of the rockets that a simple little spark or arc just wouldn't work. They did several burns before they had the final free fall and were traveling under the speed of sound anyways so impossible to make that sonic boom. Belive what you will but that is the truth and no less incredible and awesome at that!!
Nice except for the audio. Cool and all just not realistic and confusing the fuck out of people below. You aren't clever or creative for doing it. You're just stopping people from learning.
The amount of fuel that has to be kept onboard to land like this makes it so that it is not capable of going very far into space, or even to achieve orbit velocity. The cost of renewing an used rocket is just almost the same as building a new one. Musk fans seem to refuse to believe Blue Origin had reusable rockets, and abandoned the idea, because the cost exceeds the benefit.
It's not a sonic boom y'all. It's the rocket descent booster igniting using a small explosive charge to light the fuel. The boosters are not falling fast enough to create a sonic boom.
Unless these were traveling at over 700 mph as they descended to the pad then there would be no sonic boom. These were charges set off to ignite the rockets. If Elon said it was a sonic boom then he was wrong. He needs to learn more about his product.
The boosters don't go sub-sonic (slower than the speed of sound) until the beginning of that landing burn. Yes, those are sonic booms. The initial burn at the top of the atmosphere is to slow the boosters from several times the speed of sound, but they are still super-sonic until nearly touchdown.
No, you're wrong. There are plenty of other videos out there shot by onlookers from a couple miles away. I recommend you watch those and listen to what happens. You hear the igniters pop and then you hear the booster roar. Musk may have said "sonic boom" but he was probably surprised like all of us were and misspoke. Again, these boosters were not falling faster than the speed of sound during descent. Thus, you cannot produce a sonic boom. I really don't need to explain this any further as you are presumably on a computer and can google this.
Revelation 13:13 (RSV) says about the 2nd beast, "It works great signs, even making fire come down from heaven to earth in the sight of men." This SpaceX booster landing is just the latest amazing way in which our modern technology even makes fire come down from heaven to earth in the sight of men. I'd say the first way would probably be when airplanes were first used to drop bombs from high in the heavens. Then the atom bombs dropped on Hiroshima and Nagasaki were indeed great and amazing examples of fire from heaven. Then the first H-bomb was tested in 1952. H-bombs fit the "fire from heaven" idea in a new way: an H-bomb uses hydrogen fusion, the same type of fire that lights up the sun and the other stars in the heavens. So by creating and testing an H-bomb, men had metaphorically created a miniature star. Or they had metaphorically brought the fire of the stars down to earth, where it had never existed before. Hooray for our modern technology, the 2nd beast of Revelation 13, the one that works all the great signs!
i mean, the rockets landing are logical. even the bombs you are saying. your interpretation is way out of context from what the revelation is talking about. try not to cherry pick a single verse and understand the whole book instead.
It should be standard practice to just show this clip when anyone is talking about elon musk's political blah blah blah - who TF cares. Put this video on with the audio up, and say 'what where u saying again?'
In car engine term this is called a BackFire, and I think you are right sonic boom happens when an object travels faster than the speed of sound but this 2 rockets are decelerating not accelerating,
Code Breaker exactly ! during landing approach a plan, or a rocket, must deccelerate not accelerate so it's impossible to reach the sonic speed at this moment and consequently it's impossible to hear the sonic boom.
You are incorrect. But I really don't want to take the time to argue with you about it. The rocket boosters actually create three sonic booms each. By the time you hear them, yes, the boosters are traveling much slower than the speed of sound. But those sonic booms were created while the object was still thousands of feet from landing.
Pilot Dan77 in this case we should hear the sonic boom before seeing the rocket-boosters approach for landing.........and don't forget that we're talking here about landing (decceleration) not launching (acceleration).
