Successful or not, news of the test is a pretty big deal given that it was just a few months ago that reports emerged about China’s other proposed super-powered rail gun, which is intended to send astronauts on a Boeing 737-size ship into space (NASA had begun building its own astronaut-shooting railgun in the 1990s, but had to abandon it due to lack of dinero.)
I thought EM-powered launching of fragile things like people was thrown out decades ago. How do you fire something up at high Gs without having high Gs? Projectiles and even some cargo may not care, but people might.
In theory you can launch humans magnetically if you have a really long acceleration track, though I don’t think “gun” is really a very good description of such a facility since it’s more like a maglev (or hyperloop style vacuum tube train) that gradually rises miles into the air with one end open. Technically possible, but given the costs and difficulty with getting a tall enough structure I’d be fairly skeptical that China actually intends to seriously build one.
Wouldn’t have to go straight up, could go along the ground then have a long sweep that turns up
That was actually the best idea because a long enough length and curve means you can use less acceleration each second. One problem is that to keep it low, like say 3Gs, both the length and curve are huge. Like hundreds of miles. Second is the exit - how high would you have to built it to not open the vacuum tube (it has to be a vacuum to work, i.e. the issues that Hyperloop ran into) and be slamming the projectile with a deceleration effect into the thin air that’s left? The numbers have been crunched before, mass drivers on Earth can’t deliver breakable things.
Also, that curve would be additional Gs and a lot of technical problems to maintain its path.
Thats what I was thinking of, you still have to deal with building a hugely tall structure though, because the exit must be above the thickest part of the atmosphere
Most or all of it. To be at orbital velocity the projectile would be moving at 30 km/s. Even a small amount of gases would be a like a brick wall.
Hugely tall and extremely rigid, because if it wobbles while the projectile is moving through it, it will tear itself apart.
Now someone much smarter than I can do the math, but over a long enough distance with a shallow enough incline on a ramp I dont see why it couldnt be done.
The math might mean the scale of the ramp makes the idea completely unrealistic to build. But I dont see why it wouldnt work.
The shallower your incline is, the more air you have to fight through post-launch to get to orbit, during which you’re losing velocity. And to get into low-earth orbit you have to reach 28000 kph (17000 mph) because it’s not so much about going up as it is about going really fast.
So you need to leave the end of the gun going fast enough to lose speed to air resistance and still reach and maintain orbit. I haven’t attempted the math, but it seems like your vehicle would burst into flame going that speed in the atmosphere.
You still haven’t accounted for how an orbital insertion would work. You have to reach orbital speeds in the correct direction which requires a directional burn not possible from the ground.
Ok, so how does the orbital insertion burn work then? Are they rail gunning rocket engines and fuel up there too?
Re-read the comment. “Physics has entered the chat” Its neither a yes or a no that its possible.
Im sure you could accellerate a person gradually enough over a long enough distance in a sufficient vehicle to launch them into space. Wether its practical or if we have the tech yet isnt “physics”…
Re-read the comment. “in space” is not the same as “in a usable orbit”
Inertial dampeners
Yea that’s just bullshit
The war on god continues
Man, what a cancer site. Anybody got an archive link?
Wow. Meet Your Macher
China’s navy has apparently tested out a hypersonic rail gun — basically a device that uses a series of electromagnets to accelerate a projectile to incredible speeds — but during a demonstration of its power, things didn’t go quite as planned.
As the South China Morning Post reports, the rail gun test lobbed a precision-guided projectile — or smart bomb — nine miles into the stratosphere. But because it apparently didn’t go up as high as it was supposed to, the test was ultimately declared unsuccessful.
This conclusion came after an analysis led by Naval Engineering University professor Lu Junyong, whose team found with the help of AI that even though the winged smart bomb exceeded Mach 5 speeds, it didn’t perform as well as it could have.
This occurred, as Lu’s team found, because the projectile was spinning too fast during its ascent, resulting in an “undesirable tilt.” Gun for Everybody
Successful or not, news of the test is a pretty big deal given that it was just a few months ago that reports emerged about China’s other proposed super-powered rail gun, which is intended to send astronauts on a Boeing 737-size ship into space (NASA had begun building its own astronaut-shooting railgun in the 1990s, but had to abandon it due to lack of dinero.)
As with many space technologies, there’s the propensity for some messy overlap with military tech. As such, news about the smart bomb rail gun test, which for the record did not make it all the way to space, could well freak out officials stateside.
Chinese officials, meanwhile, are paying lip service to the hypersonic rail gun technology’s potential to revolutionize civilian travel by creating even faster railways and consumer space launches, too.
Despite the big promises of politicos, there are still lots of technical kinks that’ll need to be ironed out before a giant rail gun is ready to shoot humans — or weapons — into space, not least of which the spinning and tilt issues demonstrated by the Naval Engineering University researchers in this test.
More on Chinese military tech: China Working on Super-Fast Submarines Powered by Lasers
NASA wanted to shoot astronauts into space? Like going from 0 to 800+ mph in an instant type of shoot?
Mulch + uBlock Origin makes it clean enough.
We’re THIS FUCKING CLOSE 🤏 to mecha anime shit and I am ALL for it.
If it wasn’t for all that annoying physics. Harrumph
I guess Snake didn’t succeed in his mission.
I like the glitter. Nice touch.
Oh hey mass drivers. Now they just need another one on the moon and they can shoot cargo up there instead of using a rocket
Or they can land really flattened things in new craters.
Imagine how far they could shoot a dumb bomb
Of course the Chinese built a railgun. Bet they also called it Biribiri.
Meet your Macher
Who’s mocking me and why would I wanna meet 'em?
