# When does the space shuttle stop its gravity turn?

I am trying to model the launch of the space shuttle (up to 120km of altitude) from Cape Canaveral, Florida. In order to do so I would need to know when the gravity turn part of the flight starts and stops.

I know that the gravity turn starts 20 seconds after lift off with a pitch angle of 78 degrees. (source look at left column)

Before that I will assume vertical flight.

I could find a paper in which figure 5 suggests that the gravity turn for ARES 1 starts 20 seconds after lift off and ends 130 seconds after lift off. But I don't know if the same would be true for the space shuttle.

I could not find any data about when the gravity turn stops for the space shuttle neither could I find at what angle of attack (& pitch) the space shuttle continues. Does anybody have this data?

• This is too partial for even a partial answer, but in Space Shuttle Technical Conference Volume I, page 187 (202 of the pdf) there's a plot of angle of attack, but only for the first two minutes. ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19850008580.pdf Aug 17, 2019 at 13:31
• Seeing the small angles of attack I would say that the gravity turn already lasts for at least 2 minutes, or does it continue with such a small angle of attack after the gravity turn? Aug 17, 2019 at 13:49
• You might be interested to read this answer and especially its linked references: space.stackexchange.com/questions/23137/… Aug 17, 2019 at 13:55
• I have read it, but I don't really see how it explains the question. It shows the gimbal angles of the engines but I would need to know the angle of attack that results from the trust that no longer goes through the CoM. What is the important part in your post? Aug 17, 2019 at 14:13
• You mean the DOLILU software system? It is interesting, but above my capabilities, I would like to start with something that I can solve analytically (taking some rough assumptions and now I am trying to figure out which these assumptions are) Aug 17, 2019 at 14:56