Urwumpe
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Since a few people have been upset... lets discuss the rest in a few thread:
The data for the first flights can be found at the end of this NASA book:
http://history.nasa.gov/SP-4109.pdf
It also shows the extreme sideslip anomaly during the first bank command of STS-1.
The dedicated display system (DDS) is best explained in the Shuttle Crew Operations Manual. You have to find an older version, not the most recent revision, since the most recent revision describes the MEDS upgrade, which behaves similar to the original mechanic cockpit, but is based on modern LCD displays.
Here you can see the old cockpit as reference for the post:
The indicator in question about the sideslip anomaly is the lower mechanic needle of the ADI ball, the "artificial horizon" in aircraft. It is positioned by the GNC software in the four general purpose computers, the software also defines the range of yaw errors, that the needle represents. It is used as a sideslip indicator during re-entry, since the Shuttle software defines the current ground track of the Shuttle during re-entry as reference for 0° yaw.
As summary, you can say that the display for yaw error is always -2.5° to +2.5° during the re-entry major modes and displays sideslip.
http://www.spaceshuttleguide.com/sy...B)_ADI_Error_Switch_vs._Full_Range_Deflection_
The indicator needle is moved mechanically in the old shuttle cockpit and can move slower than the Space Shuttle orbiter changes its attitude. The GPCs get more accurate data 25 times per second, than this display may show. Also, the important attitude data is recorded during flight on tape at high rate for analysis. This had been the base for the post-flight analysis.
Still it is not the only indicator. If you look at the right edge of the picture, there is the center CRT display, CRT 3, displaying one of the re-entry OPS. This not only shows the reference trajectory (the three lines) and the current attitude (RPY, left side), but also the AOA (alpha) and sideslip (beta) errors. If I remember correctly, this display gets updated only 2 times per second, a limitation of the computer speed at that time.
The data for the first flights can be found at the end of this NASA book:
http://history.nasa.gov/SP-4109.pdf
It also shows the extreme sideslip anomaly during the first bank command of STS-1.
The dedicated display system (DDS) is best explained in the Shuttle Crew Operations Manual. You have to find an older version, not the most recent revision, since the most recent revision describes the MEDS upgrade, which behaves similar to the original mechanic cockpit, but is based on modern LCD displays.
Here you can see the old cockpit as reference for the post:
The indicator in question about the sideslip anomaly is the lower mechanic needle of the ADI ball, the "artificial horizon" in aircraft. It is positioned by the GNC software in the four general purpose computers, the software also defines the range of yaw errors, that the needle represents. It is used as a sideslip indicator during re-entry, since the Shuttle software defines the current ground track of the Shuttle during re-entry as reference for 0° yaw.
As summary, you can say that the display for yaw error is always -2.5° to +2.5° during the re-entry major modes and displays sideslip.
http://www.spaceshuttleguide.com/sy...B)_ADI_Error_Switch_vs._Full_Range_Deflection_
The indicator needle is moved mechanically in the old shuttle cockpit and can move slower than the Space Shuttle orbiter changes its attitude. The GPCs get more accurate data 25 times per second, than this display may show. Also, the important attitude data is recorded during flight on tape at high rate for analysis. This had been the base for the post-flight analysis.
Still it is not the only indicator. If you look at the right edge of the picture, there is the center CRT display, CRT 3, displaying one of the re-entry OPS. This not only shows the reference trajectory (the three lines) and the current attitude (RPY, left side), but also the AOA (alpha) and sideslip (beta) errors. If I remember correctly, this display gets updated only 2 times per second, a limitation of the computer speed at that time.
