Welcome to DU!
The truly grassroots left-of-center political community where regular people, not algorithms, drive the discussions and set the standards.
Join the community:
Create a free account
Support DU (and get rid of ads!):
Become a Star Member
Latest Breaking News
Editorials & Other Articles
General Discussion
The DU Lounge
All Forums
Issue Forums
Culture Forums
Alliance Forums
Region Forums
Support Forums
Help & Search
Can SpaceX really land on Mars? Absolutely, says an engineer who would know
http://arstechnica.com/science/2016/04/spacex-has-already-demonstrated-its-key-mars-landing-tech-with-the-falcon-9/
Can SpaceX really land on Mars? Absolutely, says an engineer who would know
Company has quietly tested Mars landing techniques with its first stage returns.
ERIC BERGER - 4/29/2016, 6:59 AM
<snip>
That's because during that launch—and about 10 others since late 2013—SpaceX has quietly been conducting the first flight tests of a technology known as supersonic retro-propulsion—in Mars-like conditions. It did so by firing the Falcon 9's engines at an altitude of 70km down through 40km, which just happens to be where the Earth's thin upper atmosphere can act as a stand-in for the tenuous Martian atmosphere. Therefore, as the Falcon thundered toward Earth through the atmosphere at supersonic speeds and its engines fired in the opposite direction, the company might as well have been trying to land on Mars.
These test flights were classic SpaceX—flying a primary mission, such as delivering cargo to the International Space Station, but also piggybacking other technology demonstration missions on top of it.
<snip>
SpaceX began testing supersonic retro-propulsion as far back as September 2013, when the company first flew its upgraded Falcon 9 rocket, v1.1, which had about 60 percent more thrust than the original. But even as this vehicle made its maiden flight—a test flight really—SpaceX started collecting data on a controlled descent in the Martian-relevant conditions of the upper atmosphere. A year later, amid growing interest from NASA, a space agency WB-57 airplane and a Navy NP-3D Orion aircraft trailed the Falcon as it reentered the atmosphere to capture images and thermal data.
Among those eagerly watching the flight tests was Bobby Braun, an aerospace engineer at Georgia Institute of Technology, who has led a joint research effort with SpaceX and NASA to study supersonic retro-propulsion. "I have access to all of that data, and I’ll tell you that it's worked like a charm every time," he told Ars. "The stability was manageable, and while there are still some issues, there are no showstoppers."
<snip>
Can SpaceX really land on Mars? Absolutely, says an engineer who would know
Company has quietly tested Mars landing techniques with its first stage returns.
ERIC BERGER - 4/29/2016, 6:59 AM
<snip>
That's because during that launch—and about 10 others since late 2013—SpaceX has quietly been conducting the first flight tests of a technology known as supersonic retro-propulsion—in Mars-like conditions. It did so by firing the Falcon 9's engines at an altitude of 70km down through 40km, which just happens to be where the Earth's thin upper atmosphere can act as a stand-in for the tenuous Martian atmosphere. Therefore, as the Falcon thundered toward Earth through the atmosphere at supersonic speeds and its engines fired in the opposite direction, the company might as well have been trying to land on Mars.
These test flights were classic SpaceX—flying a primary mission, such as delivering cargo to the International Space Station, but also piggybacking other technology demonstration missions on top of it.
<snip>
SpaceX began testing supersonic retro-propulsion as far back as September 2013, when the company first flew its upgraded Falcon 9 rocket, v1.1, which had about 60 percent more thrust than the original. But even as this vehicle made its maiden flight—a test flight really—SpaceX started collecting data on a controlled descent in the Martian-relevant conditions of the upper atmosphere. A year later, amid growing interest from NASA, a space agency WB-57 airplane and a Navy NP-3D Orion aircraft trailed the Falcon as it reentered the atmosphere to capture images and thermal data.
Among those eagerly watching the flight tests was Bobby Braun, an aerospace engineer at Georgia Institute of Technology, who has led a joint research effort with SpaceX and NASA to study supersonic retro-propulsion. "I have access to all of that data, and I’ll tell you that it's worked like a charm every time," he told Ars. "The stability was manageable, and while there are still some issues, there are no showstoppers."
<snip>
3 replies
= new reply since forum marked as read
= new reply since forum marked as read
Response to bananas (Original post)
