Horizons mission - Soyuz: launch to orbit
Why Space Exploration Stack Exchange recommends it
Space Stack Exchange users link it as a timestamped reference for Soyuz ascent events, such as stage cutoffs, the cabin's zero-g indicator and the crew's reactions, when asking or answering questions about launch dynamics and onboard gear.
Recommended by 0 people across 0 different months, 2017 to 2023.
What it is
An ESA video of the full Soyuz MS-09 launch from liftoff to orbit, shown from inside the crew capsule and with the first external camera shots from the spacecraft. It carries a timestamped list of events (stage separations, fairing jettison, engine cutoff) with commentary from ESA astronaut Matthias Maurer and host Richard Hollingham.
What people said
Cites user12102 · 2017-04 · Space Exploration Stack Exchange · on “Puzzler: What acceleration are these astronauts experiencing?”
From only the video footage within the capsule, please estimate the rocket's acceleration (gee's). [LINK] Show all work and assumptions. There is a different but related video below, also with swinging objects, in case the original BBC link fails at some point in the future.
Cites Hans · 2019-04 · Space Exploration Stack Exchange · on “What was Apollo 13's "Little Jolt" after MECO?”
This ist still happening on modern rocket launches, just due to the way rockets work. You can observe it during every Soyuz launch. Here is one with the cutoff of the second stage [this video] and the third stage [this video] after which you can see the 0g indicator floating around the cabin since the vessel is not accelerating any more. (The first stage = booster separation is less obvious).
Cites Bob516 · 2019-10 · Space Exploration Stack Exchange · on “Why is Soyuz's third stage's engine cutoff the most intense?”
Based on the motion and reaction of the cosmonauts, the 3rd stage engine cutoff ( cued video [this video] ) at about T+ 08:46 in this video of a Soyuz ascent causes greater negative G-forces than the 1st stage [this video] cutoff at about T+ 01:58 the 2nd stage [this video] cutoff at about T+ 04:48 . During 3rd stage cutoff the cosmonauts' arms are thrown forward much more than the previous cutoffs: in the first their arms barely move, in the second just a little. Does the 3rd stage cutoff really produce greater recoil and negative G-forces than the previous stages? Why would that be?
Cites Bob516 · 2019-10 · Space Exploration Stack Exchange · on “What are the G-forces of Soyuz 3rd stage engine cutoff”
Follow up to my previous question Third stage engine cutoff of Soyuz looks most intense, why is that? [LINK] . The third stage cutoff gives a pretty good kick to the cosmonauts, cued video [this video] at about T+ 08:46 during a Soyuz ascent. Is there any information about what G-forces the cosmonauts experience during this engine cutoff? Is there a way of determining how that compares to a 10 mph, 25 mph, or 40 mph head-on automobile collision?
Cites Steve Pemberton · 2023-09 · Space Exploration Stack Exchange · on “Why would astronauts need a wristwatch and a separate timer?”
As mentioned in another answer [LINK] to your question, astronauts may need to time multiple events. Also using multiple clocks helps to detect if one clock is wrong. In fact Buzz Aldrin famously wears three watches, he says one reason is because with only two you don't know which one is right, whereas when wearing three watches they essentially "vote" on the correct time. “See you need an odd number (of watches) in case there is a discrepancy so you can sort out which one is what,” ( buzzaldrin.com [LINK] ) And similar to airline pilots who sometimes wear two watches for different time zones, astronauts often wear two watches for the same reason. For example one watch set for UTC, the other
Cites Steve Pemberton · 2023-09 · Space Exploration Stack Exchange · on “What is this device/object that the SpaceX astronauts are holding?”
It sure looks just like it and CDN is a brand that NASA has used in the past. In fact here is a CDN timer on a Soyuz [this video] . NASA has used other brands also, here is a shot from STS-132 [LINK] showing two timers, the brand on the right is Time Check, the brand on the left is different but unfortunately illegible because of a sticker placed over it. Here's John Glenn's Time Check from STS-95 [LINK]