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Scott Manley

@DJSnM • 684,096 subscribers

Internet Rocket Scientist, Gamer, Astronomer, Dad, Scotsman, Pilot. Makes videos about space and science https://t.co/mLfUsogKq5

Shorts

I slowed down and resynched the engine diagram during the booster engine restart, that's a pretty hard failure that damaged neighbours.

I slowed down and resynched the engine diagram during the booster engine restart, that's a pretty hard failure that damaged neighbours.

1,100,325 views

Sad to hear Wally has gone west. I remember watching NS-16 and when the capsule was decelerating at Max g loading she was whooping and cheering while everyone else was silent.

Sad to hear Wally has gone west. I remember watching NS-16 and when the capsule was decelerating at Max g loading she was whooping and cheering while everyone else was silent.

145,708 views

2 months later the creator of Nuclear Design Bureau is still waiting for the US government to confirm that his video game that uses Minecraft level physics simulations is not a threat to national security.

2 months later the creator of Nuclear Design Bureau is still waiting for the US government to confirm that his video game that uses Minecraft level physics simulations is not a threat to national security.

442,341 views

We've never seen anything like this recording of a landing on another world.

We've never seen anything like this recording of a landing on another world.

1,907,144 views

This is the first time I’ve seen a plane with this feature

This is the first time I’ve seen a plane with this feature

171,617 views

The show today was a bit lower energy than what we had last week:

The show today was a bit lower energy than what we had last week:

23,058 views

I still don't have a good explanation for why the booster flipped the wrong direction beyond the notion that it's an unstable situation and small perturbations can quickly grow in ways not planned.

I still don't have a good explanation for why the booster flipped the wrong direction beyond the notion that it's an unstable situation and small perturbations can quickly grow in ways not planned.

188,456 views

So... is this some pyrotechnic to nail the legs to the deck?

So... is this some pyrotechnic to nail the legs to the deck?

766,805 views

And here's a comparison to the 2kt Post test.

And here's a comparison to the 2kt Post test.

107,650 views

Flashback to 3 years ago when I predicted this catch mechanism in Kerbal Space Program

Flashback to 3 years ago when I predicted this catch mechanism in Kerbal Space Program

1,192,826 views

A lot of the news stories talking about the uncommanded A320 dive talk about losing 100 feet over 10 seconds. That really doesn't sell the suddenness of this pitch down. It essentially performed a zero g dive for a second then pulled out at about 1.4g.

A lot of the news stories talking about the uncommanded A320 dive talk about losing 100 feet over 10 seconds. That really doesn't sell the suddenness of this pitch down. It essentially performed a zero g dive for a second then pulled out at about 1.4g.

450,174 views

Whoever setup the sound this time deserves an award

Whoever setup the sound this time deserves an award

111,927 views

The WB-57 involved in todays incident shot this footage a couple of months ago:

The WB-57 involved in todays incident shot this footage a couple of months ago:

296,123 views

I was wondering whether the tablets that were used on Starliner would be iPads like everyone else, or Android.... They're windows tablets.

I was wondering whether the tablets that were used on Starliner would be iPads like everyone else, or Android.... They're windows tablets.

806,992 views

One last observation - during hot staging the booster velocity drops rapidly for a moment, this is faster than can be explained by gravity. If this is accurate the booster had negative g loading for a moment, possibly lifting propellent off bottom of tanks. It's very short, but still a bigger deceleration than I expected

One last observation - during hot staging the booster velocity drops rapidly for a moment, this is faster than can be explained by gravity. If this is accurate the booster had negative g loading for a moment, possibly lifting propellent off bottom of tanks. It's very short, but still a bigger deceleration than I expected

981,609 views

Just look at the massive radiators that aren't on there, because the whole thing is running on solar power anyway.

Just look at the massive radiators that aren't on there, because the whole thing is running on solar power anyway.

212,582 views

When I visited NASA Ames back in July I got a look at this supercomputer simulation showing why SLS has acquired a pair of strakes next to the SRBs. These work as vortex generators that inhibit the large oscillations in the airflow between the core and boosters

When I visited NASA Ames back in July I got a look at this supercomputer simulation showing why SLS has acquired a pair of strakes next to the SRBs. These work as vortex generators that inhibit the large oscillations in the airflow between the core and boosters

249,954 views

There are all these dumb conspiracies about Jewish Space Lasers. So I did the math on the orbital mechanics of this imaginary constellation.

There are all these dumb conspiracies about Jewish Space Lasers. So I did the math on the orbital mechanics of this imaginary constellation.

154,067 views

That does not look good

That does not look good

325,178 views

Comparing the two different times we saw the skirt camera and it's very obvious the flames are more apparent later on. I didn't want to jump to conclusions because entrained fuel burning is normal on many rockets, but this clearly got worse showing that the failure progressed.

Comparing the two different times we saw the skirt camera and it's very obvious the flames are more apparent later on. I didn't want to jump to conclusions because entrained fuel burning is normal on many rockets, but this clearly got worse showing that the failure progressed.

309,808 views

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Precision landing and Viking funeral all in one! Also, I think I still notice some orange colour on there
0:44
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Precision landing and Viking funeral all in one! Also, I think I still notice some orange colour on there

Scott Manley

8,750,642 views • 1 month ago

Skyroot 3rd stage separation almost went like Falcon 1 flight 3 - I think their thrust decay was slower than expected.
0:22
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Skyroot 3rd stage separation almost went like Falcon 1 flight 3 - I think their thrust decay was slower than expected.

Scott Manley

57,401 views • 8 hours ago

Magnificent!
0:27
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Magnificent!

Scott Manley

3,440,623 views • 1 month ago

Sound synchronized from NSF - NASASpaceflight.com footage
0:34
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Sound synchronized from NSF - NASASpaceflight.com footage

Scott Manley

1,096,372 views • 1 month ago

No audio, but the text transcription from the MD-11 crash synced to the reconstruction using the data recorder.
0:31
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No audio, but the text transcription from the MD-11 crash synced to the reconstruction using the data recorder.

Scott Manley

968,939 views • 1 month ago

Watch as air traffic clears the debris zones
0:26
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Watch as air traffic clears the debris zones

Scott Manley

5,144,681 views • 1 year ago

Here's the reconstruction of the view from AA472 based upon the last few minutes of data. It had been switched from RWY1 to RWY33 to help with traffic flow, the Helicopter was instructed to avoid the airliner and reported traffic in sight. It's very likely they were looking at the wrong plane. Crew of jet would not be able to see helicopter and the proximity warning systems were less reliable with the older transponder design on the helicopter.
2:11
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Here's the reconstruction of the view from AA472 based upon the last few minutes of data. It had been switched from RWY1 to RWY33 to help with traffic flow, the Helicopter was instructed to avoid the airliner and reported traffic in sight. It's very likely they were looking at the wrong plane. Crew of jet would not be able to see helicopter and the proximity warning systems were less reliable with the older transponder design on the helicopter.

Scott Manley

2,225,578 views • 1 year ago

So I made the objects so hot they glow, which seems suboptimal, but this is all the starlink satellites currently in orbit using Universe Sandbox Universe Sandbox
0:35
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So I made the objects so hot they glow, which seems suboptimal, but this is all the starlink satellites currently in orbit using Universe Sandbox Universe Sandbox

Scott Manley

589,007 views • 5 months ago

A great day for engineering:
1:02
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A great day for engineering:

Scott Manley

2,341,217 views • 1 year ago

The show today was a bit lower energy than what we had last week:
0:29
DJSnM's profile picture

The show today was a bit lower energy than what we had last week:

Scott Manley

23,058 views • 5 days ago

I realized we were missing an important element with this video SpaceX Elite Dangerous
0:44
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I realized we were missing an important element with this video SpaceX Elite Dangerous

Scott Manley

178,484 views • 1 month ago

So, based on the SpaceX FCC filing, here's a SSO halo and multiple 30 degree LEO shells:
0:55
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So, based on the SpaceX FCC filing, here's a SSO halo and multiple 30 degree LEO shells:

Scott Manley

421,735 views • 5 months ago

Recreated the flight of N257BW which crashed as it returned to KSVH minutes after takeoff, it looks like it had performance issues and then ran out of energy on final approach to landing. Sad to hear this was Greg Biffle and his family.
2:02
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Recreated the flight of N257BW which crashed as it returned to KSVH minutes after takeoff, it looks like it had performance issues and then ran out of energy on final approach to landing. Sad to hear this was Greg Biffle and his family.

Scott Manley

551,343 views • 7 months ago

Oh boy, it just gets worse and worse
0:29
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Oh boy, it just gets worse and worse

Scott Manley

1,749,730 views • 2 years ago

After flying F-14's for the aerial stunts in Top Gun, Scott Altman became an Astronaut, here's him landing the shuttle. I think he planted that nose wheel like he was landing on a carrier.
1:43
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After flying F-14's for the aerial stunts in Top Gun, Scott Altman became an Astronaut, here's him landing the shuttle. I think he planted that nose wheel like he was landing on a carrier.

Scott Manley

1,518,460 views • 2 years ago

40 Years ago Barbara Morgan watched as Challenger lifted off with a crew she'd got to know well. She was the backup for the teacher in space program. We all know what happened to the shuttle, and it's understandable that many people would see this and never want to fly on it. Barbara returned to teaching but would be offered another opportunity to become an astronaut in 1998, she was still working as an elementary school teacher at that time. She trained again and was expected to fly on STS-118, assigned to Columbia, while preparing for this flight she would be on a jet that was supposed to meet Columbia after it returned from space. Again she had a front row seat to a shuttle disaster. She was undeterred and would ultimately fly to the ISS on Endeavour in 2007, leading lessons from space. We all hear about fearless test pilots, but less about fearless elementary school teachers.
1:05
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40 Years ago Barbara Morgan watched as Challenger lifted off with a crew she'd got to know well. She was the backup for the teacher in space program. We all know what happened to the shuttle, and it's understandable that many people would see this and never want to fly on it. Barbara returned to teaching but would be offered another opportunity to become an astronaut in 1998, she was still working as an elementary school teacher at that time. She trained again and was expected to fly on STS-118, assigned to Columbia, while preparing for this flight she would be on a jet that was supposed to meet Columbia after it returned from space. Again she had a front row seat to a shuttle disaster. She was undeterred and would ultimately fly to the ISS on Endeavour in 2007, leading lessons from space. We all hear about fearless test pilots, but less about fearless elementary school teachers.

Scott Manley

290,728 views • 5 months ago

Getting close to my instrument checkride, and a few people have wished me ‘good luck’. And the truth is, I wouldn’t take the test if I needed good luck to pass. But, bad luck, that can ruin the best laid plans, so I’m still happy for the wishes and blessings.
0:28
DJSnM's profile picture

Getting close to my instrument checkride, and a few people have wished me ‘good luck’. And the truth is, I wouldn’t take the test if I needed good luck to pass. But, bad luck, that can ruin the best laid plans, so I’m still happy for the wishes and blessings.

Scott Manley

54,331 views • 28 days ago

Cool engineering thing about IMAX - the film is so large that a traditional film transport system would put too much stress on the sprocket holes on the edge of the film. The film needs to get pulled forward a frame and then held still, the acceleration forces increase as the square of the frame size, so the full 15 hole/frame IMAX film is 9 times the acceleration of 5 hole/frame 70mm. This extra stress increases the chance that film gets damaged to the point that the developers of the format came up with a 'Rolling loop' transport mechanism that bends the film into a loop of exactly the right length, this moves down the film like a wave, and each wave advances the film by one frame. This changes the stresses and lets the large format film work without failing. I remember seeing this in the 90's and only just remembered when someone showed me a video from Ryan Coogler talking about film formats.
0:30
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Cool engineering thing about IMAX - the film is so large that a traditional film transport system would put too much stress on the sprocket holes on the edge of the film. The film needs to get pulled forward a frame and then held still, the acceleration forces increase as the square of the frame size, so the full 15 hole/frame IMAX film is 9 times the acceleration of 5 hole/frame 70mm. This extra stress increases the chance that film gets damaged to the point that the developers of the format came up with a 'Rolling loop' transport mechanism that bends the film into a loop of exactly the right length, this moves down the film like a wave, and each wave advances the film by one frame. This changes the stresses and lets the large format film work without failing. I remember seeing this in the 90's and only just remembered when someone showed me a video from Ryan Coogler talking about film formats.

Scott Manley

274,676 views • 5 months ago

Oh dear.... Neil deGrasse Tyson teaching that wings work through the fallacy of equal transit theory. As if the atoms in one piece of air somehow know what the atoms in in the air on the other side of a wing are doing. We have enough problems with new pilots getting this strange unphysical idea without someone who'd supposed to have a degree in this promoting this as a fact.
0:25
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Oh dear.... Neil deGrasse Tyson teaching that wings work through the fallacy of equal transit theory. As if the atoms in one piece of air somehow know what the atoms in in the air on the other side of a wing are doing. We have enough problems with new pilots getting this strange unphysical idea without someone who'd supposed to have a degree in this promoting this as a fact.

Scott Manley

1,082,794 views • 2 years ago

I resynced the telemetry bar with the video of MECO & Hot Stage. Now it's more obvious the order of engine shut down, relight and failure on the boost back. I suspect that booster failure is something like a fluid hammer effect given the stop and restart puts lots of stress on plumbing.
1:29
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I resynced the telemetry bar with the video of MECO & Hot Stage. Now it's more obvious the order of engine shut down, relight and failure on the boost back. I suspect that booster failure is something like a fluid hammer effect given the stop and restart puts lots of stress on plumbing.

Scott Manley

1,187,924 views • 2 years ago