Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [flight-profile]

The tag has no usage guidance.

3
votes
0answers
118 views

Why is the delay between main engine cutoff and second stage ignition so long? [duplicate]

I was reading over the recent Antares launch profile and was surprised to see that the main engine cutoff is at T+230s, but the second stage does not ignite until almost 100 seconds later. Why is ...
5
votes
2answers
974 views

Are 'classical' gravity turns still used and recognizable as such?

If I understand correctly, the term 'gravity turn' refers to a specific way to turn from the initial near-vertical launch direction to a final tangential orbit direction in an efficient manner. It's ...
33
votes
4answers
9k views

Why is there a hole in solid rocket engines?

I would like to find out why there is a straight hole down the middle in all solid rocket engine motors. I thought it only makes sense in hybrid engines where pure oxygen needs to be blown down the ...
9
votes
1answer
957 views

How is rocket engine cutoff controlled?

In a typical, modern satellite launch, what triggers the cutoff of the orbital insertion stage's rocket engines? I can think of three basic possibilities: Compute how much fuel you need for the ...
7
votes
3answers
201 views

Can a launch-provider determine from the flight-profile whether the payload will be in the wrong orbit?

The British Broadcasting Corporation writes to say The European Space Agency (Esa) says the latest two satellites for Europe's version of the American GPS satellite navigation system have not gone ...