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Scott Manley

@DJSnM • 680,323 subscribers

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

Shorts

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

164,344 views

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.

1,099,098 views

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

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

102,685 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.

188,170 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.

441,727 views

Whoever setup the sound this time deserves an award

Whoever setup the sound this time deserves an award

111,342 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.

1,858,933 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?

766,720 views

Booster appeared to self stabilize aerodynamically

Booster appeared to self stabilize aerodynamically

36,007 views

The NTSB released the security camera video showing the engine separating from the UPS MD-11 moments before it crashed. The docket also includes the inspection of the engines and in particular, engine two which showed a few performance blips prior to the crash but with recovery to commanded speeds. So, I don't believe there's evidence that debris were ingested into engine 2, instead the performance problems were related to the flames from the wing entering engine 2. Some of the footage appears to support this.

The NTSB released the security camera video showing the engine separating from the UPS MD-11 moments before it crashed. The docket also includes the inspection of the engines and in particular, engine two which showed a few performance blips prior to the crash but with recovery to commanded speeds. So, I don't believe there's evidence that debris were ingested into engine 2, instead the performance problems were related to the flames from the wing entering engine 2. Some of the footage appears to support this.

42,534 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

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:

296,104 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

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.

211,563 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.

806,971 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

249,813 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

I see lots of people questioning how slow a fully loaded New Glenn would lift off in the current configuration, well thanks to the power of math, and video editing, here's what New Glenn carrying a 45 ton payload might look like. Assuming no improvements to engine thrust.

I see lots of people questioning how slow a fully loaded New Glenn would lift off in the current configuration, well thanks to the power of math, and video editing, here's what New Glenn carrying a 45 ton payload might look like. Assuming no improvements to engine thrust.

153,206 views

People are saying that this SRB nozzle failure in 2019 shows that there has been no progress. I disagree, yesterday's failure was more than just the nozzle and was far worse, so they've actually gone backwards in terms of test success.

People are saying that this SRB nozzle failure in 2019 shows that there has been no progress. I disagree, yesterday's failure was more than just the nozzle and was far worse, so they've actually gone backwards in terms of test success.

241,159 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

8,736,169 views • 12 days ago

Magnificent!
0:27
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Magnificent!

Scott Manley

3,433,097 views • 12 days ago

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

Scott Manley

1,082,706 views • 6 days 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

965,922 views • 14 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

176,144 views • 11 days ago

Keeping the camera angle fixed as I loop a Citabria
0:23
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Keeping the camera angle fixed as I loop a Citabria

Scott Manley

55,528 views • 4 days 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

5,144,554 views • 1 year ago

Still they went for a landing burn regardless, but raptor 3's didn't cooperate.
0:21
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Still they went for a landing burn regardless, but raptor 3's didn't cooperate.

Scott Manley

66,960 views • 12 days 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

588,835 views • 3 months 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

Hand flying, most of the panel covered up, but staying on course.
0:33
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Hand flying, most of the panel covered up, but staying on course.

Scott Manley

47,583 views • 10 days ago

I had the best morning today, multiple instrument approaches, rough air, in and out of the clouds for 2 hours. I came away feeling I’d actually learned something today
0:41
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I had the best morning today, multiple instrument approaches, rough air, in and out of the clouds for 2 hours. I came away feeling I’d actually learned something today

Scott Manley

35,479 views • 8 days ago

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

Scott Manley

2,340,187 views • 1 year 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

421,055 views • 3 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

551,170 views • 5 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

1,749,668 views • 1 year 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

290,632 views • 4 months 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
DJSnM's profile picture

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 • 4 months 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

1,518,318 views • 2 years 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

1,082,770 views • 2 years ago