Flying the Shuttle - Entry: Difference between revisions

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Flying the Shuttle - Entry (view source)

Revision as of 18:27, 21 March 2016

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→‎De-orbit and entry planning in FG 3.6
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The next thing is to activate the guidance computer. The details of what is supported depend on the version of the Shuttle:
The next thing is to activate the guidance computer. The details of what is supported depend on the version of the Shuttle:
=== De-orbit and entry planning in FG 3.6 ===
If you adjusted your starting position / deorbit burn such that the groundtrack intersects with a landing site, you can select the site and activate the computer - guidance information will then be displayed in the lower right part of the HUD. At the same time, you can monitor the predicted trajectory on the map. If the computed ballistic impact point is close to the landing site, the entry is flyable (note that due to the cross range capability of the Shuttle, there's a significant margin for deviation, so the ballistic end point does not need to be perfectly aimed).
This is how a guidance solution for an entry to Vandenberg looks like:
[[File:Shuttle-landing01.jpg|600px|Groundtrack map and entry guidance computer for the Space Shuttle]]
Since the Shuttle is pitched up most of the time, you don't see much except the HUD during the entry phase. Make sure a suitable entry DAP is engaged when reaching entry interface - as the Shuttle is not aerodynamically stable in the yaw axis during entry, this needs to be agressively managed by the yaw jets.
Important HUD readings to monitor are pitch and roll angle, nose temperature, vertical speed, Mach number and acceleration and pf course the guidance information in the lower left. The guidance information includes range to target, current deceleration, deceleration needed to reach the landing site, azimuthal deviation to target and deviation from ideal AoA.


=== De-orbit and entry planning in the Shuttle devel version ===
=== De-orbit and entry planning in the Shuttle devel version ===
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