inherit
TEH EVUL CREEP
1008
0
Sept 27, 2021 23:28:25 GMT
3,757
BamBam the Destroyer
I hunt, therefore I am
2,774
August 2016
jockcranley
Mass Effect Trilogy, Dragon Age: Origins, Dragon Age Inquisition, Mass Effect Andromeda
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Post by BamBam the Destroyer on Mar 4, 2021 13:33:47 GMT
SpaceX Starship SN10 landed... and then blew up. RIP. Space Rocket programs are known for their.... growing pains. It does take a pair of cojones to be an astro/cosmonaut in light of these risks. If humans did nothing risky, we'd never accomplish anything. That said, seeing that SpaceX has all these rockets and haven't injured or killed anyone is telling about their approach to taking those risks.
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inherit
TEH EVUL CREEP
1008
0
Sept 27, 2021 23:28:25 GMT
3,757
BamBam the Destroyer
I hunt, therefore I am
2,774
August 2016
jockcranley
Mass Effect Trilogy, Dragon Age: Origins, Dragon Age Inquisition, Mass Effect Andromeda
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Post by BamBam the Destroyer on Mar 30, 2021 17:32:46 GMT
Mild thread necro.
SpaceX's starship SN11 blew up in the fog during landing this morning. I'm honestly really annoyed about not being able to see it. I mean, I've wanted them to stick a landing for forever, but if it's gonna go south, I at least wanted to see it so I could play troubleshooter. One of the mom-and-pop coverage groups got a flash in the fog and a bunch of the metal flying around, but not much else. I wouldn't be able to tell you if it landed vertical or horizontal, the fog was so thick. I will say unlike previous ones, the debris field looked like no joke. I don't know why. Cause I couldn't see anything. Cause of the fog.
Damn you fog. Now I have no material to guess why it crashed. It sounded like more engine issues. Why did they launch it in heavy fog?
Anywho, bring on SN15! (SN12, SN13, SN14 were all scrapped due to changes in construction methods). Maybe SN15 will be the one to stick the landing.
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inherit
802
0
Apr 25, 2024 13:10:28 GMT
5,243
B. Hieronymus Da
Unapologetic Western Chauvinist. Barefoot. Great Toenails
3,607
August 2016
bevesthda
Mass Effect Trilogy, Dragon Age: Origins, Dragon Age 2, Dragon Age Inquisition, KOTOR, Baldur's Gate, Neverwinter Nights
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Post by B. Hieronymus Da on Mar 31, 2021 21:03:36 GMT
My guess (I have no information) is that it wasn't due to any structural or mechanical failure this time. Before the landing they are transferring fuel and switching tanks. If valves are not properly closed and opened in the right order, the rocket will explode. They had some weird malfunctions during the flight. Cameras stopped working for one thing. So it could be something with the control system or power. Computer bug or accidentally cut line.
A disappointment.
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inherit
TEH EVUL CREEP
1008
0
Sept 27, 2021 23:28:25 GMT
3,757
BamBam the Destroyer
I hunt, therefore I am
2,774
August 2016
jockcranley
Mass Effect Trilogy, Dragon Age: Origins, Dragon Age Inquisition, Mass Effect Andromeda
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Post by BamBam the Destroyer on Apr 5, 2021 12:35:55 GMT
The community consensus seems to be a failed re-light on one of the Raptor engines, leading to a mid-air explosion (hence the large debris field).
The Raptor engines seem to be the most unreliable part of the system.
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inherit
802
0
Apr 25, 2024 13:10:28 GMT
5,243
B. Hieronymus Da
Unapologetic Western Chauvinist. Barefoot. Great Toenails
3,607
August 2016
bevesthda
Mass Effect Trilogy, Dragon Age: Origins, Dragon Age 2, Dragon Age Inquisition, KOTOR, Baldur's Gate, Neverwinter Nights
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Post by B. Hieronymus Da on Apr 6, 2021 22:26:52 GMT
The community consensus seems to be a failed re-light on one of the Raptor engines, leading to a mid-air explosion (hence the large debris field). The Raptor engines seem to be the most unreliable part of the system. I haven't bothered to look for new information, so I don't really know anything, and I should maybe not post on this, but... I wouldn't say that the engines themselves seem unreliable. We all saw that only one engine re-lighted immediately before the explosion. But that could also very well be due to electrical problems, which the flight had already shown symptoms of. And why would a failed engine restart lead to an explosion? A dysfunctional valve can, with the help of dynamic overpressure. (SpaceX has already had that problem twice, with the Dragon and the Falcon9.) I do believe they did encounter engine damage in some of the earlier static fire tests, and during SN11's climb you can see a fire somewhere on one engine, which could be related to the later explosion. But the problems of SN8 and SN9 were related to fuel flow. It's a bit complicated to ensure that there is fuel flow, and uninterrupted fuel flow, available to all the engines, after the rocket has been in a horizontal flying position (that's why SN10 re-started all three engines, for redundancy). They have special, extra fuel tanks for that, and there are a number of fuel transfers, venting and re-routing of fuel flow going on during descent.
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inherit
Mr. Rump
46
0
Apr 24, 2024 10:22:15 GMT
8,986
Lavochkin
6,786
August 2016
lavochkin
Mass Effect Trilogy, Dragon Age: Origins, Dragon Age 2, Jade Empire, Mass Effect Andromeda
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Post by Lavochkin on Apr 14, 2021 17:12:28 GMT
Story behind the first Helicopter rescue mission, which occurred in January of 1945 during WW2 in Burma/Myanmar.
It shows what a godsend the helicopter was for rescue/extraction from remote jungle environments.
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inherit
TEH EVUL CREEP
1008
0
Sept 27, 2021 23:28:25 GMT
3,757
BamBam the Destroyer
I hunt, therefore I am
2,774
August 2016
jockcranley
Mass Effect Trilogy, Dragon Age: Origins, Dragon Age Inquisition, Mass Effect Andromeda
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Post by BamBam the Destroyer on Apr 15, 2021 14:38:06 GMT
Blue Origin does another test of New Shepard with a test dummy. ArticleNew Shepard is suborbital, and targeted at tourism. I'm not opposed to this in any way. More flight that is not dependent on political largesse is a great thing. But I wonder what their price point will be. I can't see myself buying a ticket (unless it was dirty cheap, which it won't be). It'll be interesting to see how it turns out.
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inherit
802
0
Apr 25, 2024 13:10:28 GMT
5,243
B. Hieronymus Da
Unapologetic Western Chauvinist. Barefoot. Great Toenails
3,607
August 2016
bevesthda
Mass Effect Trilogy, Dragon Age: Origins, Dragon Age 2, Dragon Age Inquisition, KOTOR, Baldur's Gate, Neverwinter Nights
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Post by B. Hieronymus Da on Apr 19, 2021 13:22:11 GMT
And the Ingenuity Mars helicopter has now become the first vehicle to achieve flight on a different planet.
Just three meters straight up, hover and landing again, so shorter than the Wright brothers.
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inherit
TEH EVUL CREEP
1008
0
Sept 27, 2021 23:28:25 GMT
3,757
BamBam the Destroyer
I hunt, therefore I am
2,774
August 2016
jockcranley
Mass Effect Trilogy, Dragon Age: Origins, Dragon Age Inquisition, Mass Effect Andromeda
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Post by BamBam the Destroyer on Apr 19, 2021 18:35:12 GMT
And the Ingenuity Mars helicopter has now become the first vehicle to achieve flight on a different planet. Just three meters straight up, hover and landing again, so shorter than the Wright brothers. Mars barely has an atmosphere, so it's a miracle that they could get any lift at all. I'm interested to see what they do with Ingenuity in the future.
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inherit
802
0
Apr 25, 2024 13:10:28 GMT
5,243
B. Hieronymus Da
Unapologetic Western Chauvinist. Barefoot. Great Toenails
3,607
August 2016
bevesthda
Mass Effect Trilogy, Dragon Age: Origins, Dragon Age 2, Dragon Age Inquisition, KOTOR, Baldur's Gate, Neverwinter Nights
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Post by B. Hieronymus Da on Apr 20, 2021 11:26:07 GMT
And here's the video:
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inherit
802
0
Apr 25, 2024 13:10:28 GMT
5,243
B. Hieronymus Da
Unapologetic Western Chauvinist. Barefoot. Great Toenails
3,607
August 2016
bevesthda
Mass Effect Trilogy, Dragon Age: Origins, Dragon Age 2, Dragon Age Inquisition, KOTOR, Baldur's Gate, Neverwinter Nights
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Post by B. Hieronymus Da on Apr 20, 2021 11:38:03 GMT
And the Ingenuity Mars helicopter has now become the first vehicle to achieve flight on a different planet. Just three meters straight up, hover and landing again, so shorter than the Wright brothers. Mars barely has an atmosphere, so it's a miracle that they could get any lift at all. I'm interested to see what they do with Ingenuity in the future. Well, yes but it's in the engineering. You can figure out what it takes and build it. It's not as bad as flying in thin air on Earth. The gravity is lower. A typical Earth problem is that the combustion engine works poorly in thin air. With electric engines that's not an issue. It doesn't really take much more power to get the required lift. While you need a much bigger rotor to get the lift, that rotor also encounters a symmetrical reduction in drag.
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inherit
802
0
Apr 25, 2024 13:10:28 GMT
5,243
B. Hieronymus Da
Unapologetic Western Chauvinist. Barefoot. Great Toenails
3,607
August 2016
bevesthda
Mass Effect Trilogy, Dragon Age: Origins, Dragon Age 2, Dragon Age Inquisition, KOTOR, Baldur's Gate, Neverwinter Nights
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Post by B. Hieronymus Da on Apr 27, 2021 23:59:00 GMT
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inherit
802
0
Apr 25, 2024 13:10:28 GMT
5,243
B. Hieronymus Da
Unapologetic Western Chauvinist. Barefoot. Great Toenails
3,607
August 2016
bevesthda
Mass Effect Trilogy, Dragon Age: Origins, Dragon Age 2, Dragon Age Inquisition, KOTOR, Baldur's Gate, Neverwinter Nights
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Post by B. Hieronymus Da on Apr 28, 2021 23:03:18 GMT
A F-14D going full at it. The 'D' version had truly brutal performance, but according to pilots who flew both the F-14 and F-18, it needed a Gorilla to pilot it. (It had old fashioned controls, no fly-by-wire). The F-14 in the end had too high operational costs for the Navy to afford continuing it. The FA-18F replaced it.
But it's the last show.
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inherit
TEH EVUL CREEP
1008
0
Sept 27, 2021 23:28:25 GMT
3,757
BamBam the Destroyer
I hunt, therefore I am
2,774
August 2016
jockcranley
Mass Effect Trilogy, Dragon Age: Origins, Dragon Age Inquisition, Mass Effect Andromeda
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Post by BamBam the Destroyer on Apr 29, 2021 13:33:30 GMT
Mars barely has an atmosphere, so it's a miracle that they could get any lift at all. I'm interested to see what they do with Ingenuity in the future. Well, yes but it's in the engineering. You can figure out what it takes and build it. It's not as bad as flying in thin air on Earth. The gravity is lower. A typical Earth problem is that the combustion engine works poorly in thin air. With electric engines that's not an issue. It doesn't really take much more power to get the required lift. While you need a much bigger rotor to get the lift, that rotor also encounters a symmetrical reduction in drag. 2% of the atmosphere, but 40% of the gravity. The balance for traditional flight on Mars is unfavorable.
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inherit
802
0
Apr 25, 2024 13:10:28 GMT
5,243
B. Hieronymus Da
Unapologetic Western Chauvinist. Barefoot. Great Toenails
3,607
August 2016
bevesthda
Mass Effect Trilogy, Dragon Age: Origins, Dragon Age 2, Dragon Age Inquisition, KOTOR, Baldur's Gate, Neverwinter Nights
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Post by B. Hieronymus Da on Apr 30, 2021 0:45:39 GMT
Well, yes but it's in the engineering. You can figure out what it takes and build it. It's not as bad as flying in thin air on Earth. The gravity is lower. A typical Earth problem is that the combustion engine works poorly in thin air. With electric engines that's not an issue. It doesn't really take much more power to get the required lift. While you need a much bigger rotor to get the lift, that rotor also encounters a symmetrical reduction in drag. 2% of the atmosphere, but 40% of the gravity. The balance for traditional flight on Mars is unfavorable. Lol, you could say that again. Building an atmosphere model is dam complicated. I've done so for Earth once and have it in my calculator (there's a slight glitch I was going to debug sometime), but I'm not doing it for Mars, so I'm just doing some rough guesstimates here: Unfortunately, Mars is not as conveniently flat as Earth. Which means I have to pick an altitude. And that will be pretty unrepresentative for most places on Mars. Anyway, I have to go on something. The air pressure at somewhat low Mars altitudes seem to be about 0.7-0.8% of Earths. And the air density at this somewhat low Mars altitude then seem to be about 1.1 - 1.25% of Earths (because CO2 is heavier than Nitrogen and Mars is colder). So lets say 0.015 Kg/m3. That roughly corresponds to 31,500 m altitude on Earth. So yeah that's a dam challenge. But due to the lower gravity, the flight problem translates to being equivalent to 25,300 m altitude on Earth. The figures look reasonable to me, so hopefully I haven't done any too big mistakes. Hmm, maybe I should have started with checking what Mars altitude Perseverance has landed on... Oh well.
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Fire Phoenix
N2
Games: Mass Effect Trilogy, Dragon Age: Origins, Dragon Age 2, KOTOR, Baldur's Gate, Shattered Steel, Neverwinter Nights, Jade Empire
Posts: 84 Likes: 140
inherit
1335
0
140
Fire Phoenix
84
August 2016
oneofthemaninblack
Mass Effect Trilogy, Dragon Age: Origins, Dragon Age 2, KOTOR, Baldur's Gate, Shattered Steel, Neverwinter Nights, Jade Empire
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Post by Fire Phoenix on May 1, 2021 8:53:11 GMT
A F-14D going full at it. The 'D' version had truly brutal performance, but according to pilots who flew both the F-14 and F-18, it needed a Gorilla to pilot it. (It had old fashioned controls, no fly-by-wire). The F-14 in the end had too high operational costs for the Navy to afford continuing it. The FA-18F replaced it. But it's the last show. Yeah that was my favorite jet when i was growing up i've seen it fly many times on airshows mostly all around Europe to bad it had to go. But then this jet came along the Sukhoi 27 and it immediately stole my heart and became my new number one. I've also seen this jet fly many times on airshows a formidable opponent.
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inherit
11346
0
Apr 25, 2024 19:09:57 GMT
1,347
skekSil
1,147
November 2019
skeksil
Mass Effect Trilogy, Neverwinter Nights, Mass Effect Andromeda, Anthem, Mass Effect Legendary Edition
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Post by skekSil on May 1, 2021 16:07:36 GMT
Yeah that was my favorite jet when i was growing up i've seen it fly many times on airshows mostly all around Europe to bad it had to go. But then this jet came along the Sukhoi 27 and it immediately stole my heart and became my new number one. I've also seen this jet fly many times on airshows a formidable opponent. Vanilla Su-27s are almost at their end days themselves. Even Ukraine (UA Su-27 pictured above) will have to seek replacement soon enough.
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inherit
802
0
Apr 25, 2024 13:10:28 GMT
5,243
B. Hieronymus Da
Unapologetic Western Chauvinist. Barefoot. Great Toenails
3,607
August 2016
bevesthda
Mass Effect Trilogy, Dragon Age: Origins, Dragon Age 2, Dragon Age Inquisition, KOTOR, Baldur's Gate, Neverwinter Nights
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Post by B. Hieronymus Da on May 2, 2021 1:50:24 GMT
Yeah that was my favorite jet when i was growing up i've seen it fly many times on airshows mostly all around Europe to bad it had to go. But then this jet came along the Sukhoi 27 and it immediately stole my heart and became my new number one. I've also seen this jet fly many times on airshows a formidable opponent. Decent aerodynamics and build finish. The Su-27 was actually a pretty crap aircraft. The Russian Su-35S, which went into operational service 2018 - and looks the same - is probably a much, much better aircraft. But the empty weight is also two tonnes heavier.
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Fire Phoenix
N2
Games: Mass Effect Trilogy, Dragon Age: Origins, Dragon Age 2, KOTOR, Baldur's Gate, Shattered Steel, Neverwinter Nights, Jade Empire
Posts: 84 Likes: 140
inherit
1335
0
140
Fire Phoenix
84
August 2016
oneofthemaninblack
Mass Effect Trilogy, Dragon Age: Origins, Dragon Age 2, KOTOR, Baldur's Gate, Shattered Steel, Neverwinter Nights, Jade Empire
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Post by Fire Phoenix on May 2, 2021 9:21:23 GMT
Yeah that was my favorite jet when i was growing up i've seen it fly many times on airshows mostly all around Europe to bad it had to go. But then this jet came along the Sukhoi 27 and it immediately stole my heart and became my new number one. I've also seen this jet fly many times on airshows a formidable opponent. Decent aerodynamics and build finish. The Su-27 was actually a pretty crap aircraft. The Russian Su-35S, which went into operational service 2018 - and looks the same - is probably a much, much better aircraft. But the empty weight is also two tonnes heavier. Not true but whatever you want to believe it's fine by me. When i mentioned the Su-27 i meant all the others as well who look the same so that also include the Su-30 the Su-33 the Su-35 and the Su-37 and by my knowledge that's all of them. Then there is the Su-34 but that jet just looks ugly.
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inherit
802
0
Apr 25, 2024 13:10:28 GMT
5,243
B. Hieronymus Da
Unapologetic Western Chauvinist. Barefoot. Great Toenails
3,607
August 2016
bevesthda
Mass Effect Trilogy, Dragon Age: Origins, Dragon Age 2, Dragon Age Inquisition, KOTOR, Baldur's Gate, Neverwinter Nights
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Post by B. Hieronymus Da on May 4, 2021 22:24:58 GMT
Well, the Blue Angels have converted to Super Hornets. I suppose it has to do with that only the Marine Corps operate the Hornet anymore (and other countries ofc), plus maybe operational costs. The Hornets are a couple of decades older and only getting older.
As I've become older, I find it harder to enjoy these group show flights. I mainly tend to think about the risks.
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inherit
1869
0
1
Apr 14, 2024 20:03:08 GMT
7,337
regack
coffee coffee coffee coffee coffee coffee coffee coffee coffee coffee coffee coffee
2,970
Oct 27, 2016 19:49:57 GMT
October 2016
regack
Top
https://bsn.boards.net/posts/recent
https://i.imgur.com/oatOJzT.png
Regack
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Post by regack on May 5, 2021 22:47:07 GMT
SpaceX just landed their Starship, and it didn't explode
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inherit
802
0
Apr 25, 2024 13:10:28 GMT
5,243
B. Hieronymus Da
Unapologetic Western Chauvinist. Barefoot. Great Toenails
3,607
August 2016
bevesthda
Mass Effect Trilogy, Dragon Age: Origins, Dragon Age 2, Dragon Age Inquisition, KOTOR, Baldur's Gate, Neverwinter Nights
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Post by B. Hieronymus Da on May 6, 2021 1:30:25 GMT
But it did burn a bit after...
Good idea, that about restarting all three engines for redundancy, because only two started.
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inherit
11346
0
Apr 25, 2024 19:09:57 GMT
1,347
skekSil
1,147
November 2019
skeksil
Mass Effect Trilogy, Neverwinter Nights, Mass Effect Andromeda, Anthem, Mass Effect Legendary Edition
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Post by skekSil on May 7, 2021 20:36:43 GMT
A very good explanation of how artificial gravity in rotating space habitats work:
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inherit
802
0
Apr 25, 2024 13:10:28 GMT
5,243
B. Hieronymus Da
Unapologetic Western Chauvinist. Barefoot. Great Toenails
3,607
August 2016
bevesthda
Mass Effect Trilogy, Dragon Age: Origins, Dragon Age 2, Dragon Age Inquisition, KOTOR, Baldur's Gate, Neverwinter Nights
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Post by B. Hieronymus Da on May 16, 2021 22:51:24 GMT
Simulated gravity can be accomplished quite simply for even small space ships. During the long transfer to Mars, the Asteroids, whatever, you just decouple the habitat module from the service module, but keep them attached with a long cable. Then you just propel them into starting to swing around each other.
The axis of rotation has to be aimed at the Sun & Earth, to keep antennas, solar panels and radiation protection fixed in the right direction.
I'm sure there are some reasons as to why NASA are not more interested in this, but I don't know of any.
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inherit
TEH EVUL CREEP
1008
0
Sept 27, 2021 23:28:25 GMT
3,757
BamBam the Destroyer
I hunt, therefore I am
2,774
August 2016
jockcranley
Mass Effect Trilogy, Dragon Age: Origins, Dragon Age Inquisition, Mass Effect Andromeda
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Post by BamBam the Destroyer on May 19, 2021 22:37:16 GMT
But it did burn a bit after... Good idea, that about restarting all three engines for redundancy, because only two started. Supposedly, the rocket "picks" two of the engines based on position and performance. Starting all three might overdo the horizontal movement.
But, they landed SN15 and are (supposedly) looking into flying it again.
I say, fly that grain silo again. Why not.
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