Questions tagged [ascent]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
13
votes
1answer
4k views

Why did a shuttle astronaut have an open book during ascent?

In the top right of the video of a shuttle launch an astronaut has an open book resting on (attached to?) the left thigh. What was the purpose of this book? The astronaut then seems to take a pen or ...
8
votes
4answers
335 views

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) at about T+ 08:46 in this video of a Soyuz ascent causes greater ...
5
votes
1answer
608 views

Seeing the ground from the shuttle before launch?

With the side windows in space shuttle cockpit, as seen in this photograph, could the commander and pilot see the ground at all before launch or during the first 10-15 seconds of a shuttle ascent? ...
4
votes
1answer
281 views

How many Lunar Module Ascent Engines were produced? How many still exist?

I know of two LM Ascent Engines still in existence. I believe Grumman built 13 Lunar modules. I also think at least 5 engines were tested at White Sands. So that is 18 that were built at a minimum. ...
3
votes
1answer
180 views

Did the Saturn V have the status check “go at throttle up”?

I'm familiar with that shuttle status check, "go at throttle up." Did the Saturn V have the same, or similar status check vocalized during the ascent? Did the Saturn V have to throttle down during ...
3
votes
1answer
132 views

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?. The third stage cutoff gives a pretty good kick to the cosmonauts, cued video at about ...
3
votes
1answer
200 views

When during the flights did astronauts use the Valsalva device?

A spongy material is installed to the inside helmets called the Valsalva device (top right in this image) allow astronauts to do the Valsalva maneuver to relieve pressure on their eardrums when there ...
3
votes
1answer
121 views

Estimate of how fast will the Starship/Super Heavy be moving 5 and 10 seconds after liftoff?

I am wanting to make a comparison of the expected initial seconds of the ascent of the Starship/Super Heavy compared to the similar time of the Saturn V ascent. If this chart (from a NASA space math ...
3
votes
0answers
125 views

Stars visible during ascent?

Did any shuttle astronaut indicate at what altitude they were first able to see the stars during an ascent to orbit at sunrise? Yeagar seeing the stars in The Right Stuff. For illustration purposes ...
2
votes
0answers
101 views

Unusual position of shuttle astronauts' arms during ascent

During the ascent of STS-135 the astronauts seem to be keeping their elbows up away from their sides with their hands forward. It can be seen throughout the ascent, here are two clips when it happens....
0
votes
0answers
42 views

Ascent propulsion system [duplicate]

For lunar module and spacecraft ascent bipropellant hypergolic fuels comprising of N2O4 oxidizer and Hydrazine derivates/blends are used. How on Earth have we accepted such a dangerous, toxic, ...