LDSD: We Brake for Mars (Part 2)
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- เผยแพร่เมื่อ 6 ก.พ. 2025
- In part 2, JPL engineer Mike Meacham explains how an inflatable decelerator will help larger spacecraft land on Mars. The device will be tested at the Pacific Missile Range Facility in Hawaii in June, 2014.
LDSD: We Brake for Mars (Part 1) • LDSD: We Brake for Mar...
You guys are just absolutely bonkers. Awesome.
This is so inspiring I am working on a degree in physics currently to hopefully do research like this in the future. Watched the live stream of the LDSD test yesterday!! Great work!!
I work at the place this is going to take off from and I can say the launch vehicle is amazing can hardly wait until lift off!
That looks amazing, best of luck in the tests! :-)
Thats fuking awesome, cant wait to see the coming tests
Incredible! Best of luck, you all! Keep innovating.
Awesome, be sure to add a Kerbal Space Program mod when you guys figure out the particulars of SIAD
Wow, that's some awesome fun there.
Na parte 2, o engenheiro do JPL Mike Meacham explica como um desacelerador inflável vai ajudar a maior nave espacial da terra a pousar em Marte. O dispositivo será testado no Centro Pacific Missile Range, no Havaí, em junho de 2014.
Not sure it is legal to have this much fun doing science :)
I just watched "Star Trek: Into Darkness" and I have to say, charming and loud as it was, compared to what JPL is up to, that film was a slap-happy musical. No offense!
Besides, JPL engineer Mike Meacham is one brainy badass. If that rocket sled conked out, I'm pretty sure "Iron Mike" would do a shot of Red Bull and push the rocket sled 250 mph, all by himself.
That . . . is the power of REAL science!
you guys are awesome.
Awesome. Sign me up for the first permanent colony.
Jebediah Kerman can help you testing it :p
I will happily raise my taxes for a higher NASA budget any day.
Same here!
JPL where every problem is solved with a rocket.
I'm so sure the original names were Low-density Supersonic Decelerator and Aerodynamic Supersonic Inflatable Decelerator. NASA does make the best trips mankind ever did.
SIAD reminds me of an air brake.
I saw the rocket sled track but no Myth Busters, bummer.
Since the parachute ripped you better have a back up chute
Is Mach 4 going to produce the same amount of shock heating on the inflatable heat shield as it would see entering the Martian atmosphere?
No. He mentioned that it would enter Mars' atmosphere at over Mach 16, so Mach 4 is way below that.
They will be able to test the parachute under realistic conditions though, once it decelerated back to Mach 2.
RufftaMan
Well, the key thing to keep in mind is that Mars' atmosphere is thinner than Earth's. So high speeds like Mach 16 in a thin atmosphere would be the same as lower speeds in a thicker atmosphere. I was just wondering if Mach 4 was the equivalent speed in out atmosphere.
y0uareatube Yeah, that is true, but they are conducting the tests at very, very high altitudes. He said that they are pulling it up to 120'000 feet, which is about 36'000 meters. At that altitude the air-pressure is probably about half of that on Mars' surface.
The pressure in the upper Mars atmosphere is even less, so what you think may be true, or it will be close to it.
I'm neither a physicist nor an engineer, so don't take my word for it. =)
I thought the title said LSD at first lol
Ldsd.. we have mormon astronauts now
Why a rocket sled? Rocket fuel isn't cheap and the exhaust is nasty. A linear motor would seem a much better solution. Yes?
NASA, new propulsion: Electro-static plasma propulsion.
When you are talking about "speed of sound" or "supersonic" are you speaking about the speed of sound on Mars or the Earth? And.. at what altitude? The speed of sound at 20 km altitude on Earth is not the same as it is at sea level, så what unit are you speaking about here really?
I think the technical term is "really fucking fast".
I think they talk about the speed of sound on the earth at sea level (at 0ºC i think) that is 340 m/s, wich is the standard value for it.
If it is the speed of sound at sea level on Earth (the standard usually is set around 15°C) that he's talking about, that doesn't have any particular relevance for Mars or deploying a parachute in its atmosphere. Why on earth (pun intended) is he using units that doesn't make any sense when he can use units that does?
I think it's just to make it easier to understand how fast the thing is going. And also this way he doesn't need to say it in m/s and mph.
But it's _not_ easy to understand since it's confusing and essentially non sensical. It may be perceived as something understandable but it's not. So Niosys's interpretation "really fucking fast" is probably more accurate and more easily understood.
Please don';t play rock music while people are talking. The subject is interesting enough without treating it as some kind of publicity stunt.