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Posted: |
Aug 4, 2020 - 11:53 AM
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By: |
Grecchus
(Member)
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Doug Hurley and Bob Behnken will be talking about their Crew Dragon experience aboard Endeavour in just under a couple of hours, for anyone interested:
https://www.youtube.com/watch?v=R_mO5uu853I
Personally, I'd be interested in what the inertial feelings of going up and coming down were like, especially how crushing 4-5 g feels after having experienced micro gravity/weightlessness.
Another aspect would be the sense of sitting inside the spacecraft using a touch-screen display with very little peripheral vision through the four windows on each side/front of the capsule. I noticed during the flight they chose to have the windows at more or less shoulder height periodically covered, and I have wondered if they did that partially to avoid sideways distraction from having to look directly at the screen when concentrating on handling the ship in real time, because what they were doing so very much resembled outright a game simulation. Like, what is the difference between doing it for real as opposed to doing essentially the same thing on the ground in the sim? The guys spent such an intensive period of mission time focused on the 2D flat panels directly in front of them. This is a significant difference to, say, landing an aircraft with the requirement to see not only the instrument displays, but also the outside world for split second cues.
Edit: Thank you, gentlemen. A most interesting and enlightening talk-through.
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Posted: |
Aug 4, 2020 - 6:22 PM
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By: |
Solium
(Member)
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'It sounds like an animal': NASA astronauts describe the Crew Dragon re-entry experience
The Demo-2 mission went very smoothly, but coming back to Earth is always a bumpy ride.
SpaceX's Crew Dragon spacecraft practically came alive during its dramatic dive through Earth's atmosphere on Sunday (Aug. 2), its NASA crew reported.
NASA astronauts Bob Behnken and Doug Hurley said they felt shimmies, tremors and rolls as the capsule, named Endeavour, returned to Earth Sunday to wrap up the nearly picture-perfect Demo-2, SpaceX's first-ever crewed mission.
"The atmosphere makes noise; you can start to hear that rumble outside the vehicle," Behnken said during a news conference today (Aug. 4). "It sounds like an animal, going through the atmosphere, with all the puffs and the atmospheric noise. It continues to gain magnitude as you descend through the atmosphere."
Tempting as it might have been to look out the window as Endeavour neared its splashdown off the coast of Pensacola, Florida, the astronauts elected not to do so. The only available views in the spacecraft are near the astronauts' feet, and the spaceflyers said they felt it was best to monitor their displays rather than crane their heads.
"It didn't seem like the smartest thing to do, as the vehicle was starting maneuvering. At that point, we were trying to make sure we were good and strapped in," Behnken said.
The sounds and sensations were normal, expected and not unfamiliar to Behnken and Hurley. Coming into the two-month-long Demo-2, the duo already had four spaceflights between them, all of which employed NASA's now-retired space shuttle.
SpaceX also gave the astronauts audio recordings and other information about Crew Dragon's first trip to the space station, on the uncrewed Demo-1 mission in 2019, to learn about conditions in the spacecraft, Behnken and Hurley said today.
But Demo-2's return to Earth was still a wild ride. Separation of the crew service "trunk" prior to re-entry felt like being "hit in the back of a chair with a baseball bat, a crack," Behnken said. Parachute deployment produced "a significant jolt," he added, and the crew felt the splash of the ocean before water flowed over the windows.
"You can see from just an overall view of the capsule that re-entry is a pretty demanding environment, with the scorches on the vehicle, and the windows were not spared any of that," Hurley said.
Source:
https://www.space.com/nasa-astronauts-demo-2-crew-dragon-experience.html
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