5 ms·

Yep. 8g's apparently.

dmurray 8y ago
The part when they are falling is only at an acceleration of 1g (that's what falling is). If they experienced 8g acceleration, it was before the ballistic part of the descent.
- larkeith 8y ago
  8g was probably from the parachutes deploying, although you do experience very slightly more than 1g acceleration while in freefall, as you encounter increasing air resistance (and significantly more in reentry).
  - ceejayoz 8y ago
    I suspect the high G period is mostly when the escape rocket fires. edit: Never mind. Chris Hadfield says it's hitting the atmosphere. https://twitter.com/Cmdr_Hadfield/status/1050385343625740289 https://twitter.com/Cmdr_Hadfield/status/1050385343625740289
    - rpeden 8y ago
      Although that didn't happen this time - the escape rocket had already been jettisoned before the failure occurred.
    - JshWright 8y ago
      The high g period was then they ran into the thicker part of the atmosphere at faster than terminal velocity (so the deceleration caused by the air is what led to the g forces).
- frgewut 8y ago
  Atmospheric reentry is more than 1g https://www.quora.com/What-is-the-acceleration-of-the-space-shuttle-during-its-re-entry-to-the-atmosphere https://www.quora.com/What-is-the-acceleration-of-the-space-...
- stetrain 8y ago
  The reentry forces could definitely exceed 1g and usually do from orbital velocity. You're moving sideways however fast the rocket left you going, and you have fallen at 1g acceleration for some amount of time before hitting thicker parts of the atmosphere. Your velocity is now way higher than terminal velocity for that altitude and you experience acceleration (deceleration).
- rMVxV3YwoF 8y ago
  Whey you are falling in a vacuum, it's not 1g, but 0g. That's what they experience on orbit. When you are falling with atmosphere resistance, it can be anything. Consider yourself jumping into water. You feel weightless when you are falling, but what do you feel when you hit the water? That's what happens when you hit atmosphere at 8km/sec.
  - stetrain 8y ago
    The difference is between acceleration and g-force. Falling towards earth in a vacuum (or orbiting earth in a vacuum) you are experiencing 1g of acceleration but zero-g of g-force because you and your spaceship are accelerating together and you aren't meeting any mechanical resistance to the acceleration. Once you start hitting atmo the velocity you've built up from your 1g of freefall meeting the resistance of the atmosphere creates g-forces.

The part when they are falling is only at an acceleration of 1g (that's what falling is). If they experienced 8g acceleration, it was before the ballistic part of the descent.

larkeith 8y ago
8g was probably from the parachutes deploying, although you do experience very slightly more than 1g acceleration while in freefall, as you encounter increasing air resistance (and significantly more in reentry).
- ceejayoz 8y ago
  I suspect the high G period is mostly when the escape rocket fires. edit: Never mind. Chris Hadfield says it's hitting the atmosphere. https://twitter.com/Cmdr_Hadfield/status/1050385343625740289 https://twitter.com/Cmdr_Hadfield/status/1050385343625740289
  - rpeden 8y ago
    Although that didn't happen this time - the escape rocket had already been jettisoned before the failure occurred.
  - JshWright 8y ago
    The high g period was then they ran into the thicker part of the atmosphere at faster than terminal velocity (so the deceleration caused by the air is what led to the g forces).
frgewut 8y ago
Atmospheric reentry is more than 1g https://www.quora.com/What-is-the-acceleration-of-the-space-shuttle-during-its-re-entry-to-the-atmosphere https://www.quora.com/What-is-the-acceleration-of-the-space-...
stetrain 8y ago
The reentry forces could definitely exceed 1g and usually do from orbital velocity. You're moving sideways however fast the rocket left you going, and you have fallen at 1g acceleration for some amount of time before hitting thicker parts of the atmosphere. Your velocity is now way higher than terminal velocity for that altitude and you experience acceleration (deceleration).
rMVxV3YwoF 8y ago
Whey you are falling in a vacuum, it's not 1g, but 0g. That's what they experience on orbit. When you are falling with atmosphere resistance, it can be anything. Consider yourself jumping into water. You feel weightless when you are falling, but what do you feel when you hit the water? That's what happens when you hit atmosphere at 8km/sec.
- stetrain 8y ago
  The difference is between acceleration and g-force. Falling towards earth in a vacuum (or orbiting earth in a vacuum) you are experiencing 1g of acceleration but zero-g of g-force because you and your spaceship are accelerating together and you aren't meeting any mechanical resistance to the acceleration. Once you start hitting atmo the velocity you've built up from your 1g of freefall meeting the resistance of the atmosphere creates g-forces.