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Space Shuttle: Difference between revisions
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→Entry and touchdown structural and aerodynamical limits
(More modest hat note) |
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This is the approximate limit beyond which the thermal protection system fails, with subsequent structural failure of the overheated airframe and loss of the orbiter. Currently this limit is not checked since the modeling of the entry temperature is too rough. | This is the approximate limit beyond which the thermal protection system fails, with subsequent structural failure of the overheated airframe and loss of the orbiter. Currently this limit is not checked since the modeling of the entry temperature is too rough. | ||
* gear extension speed < 312 KEAS (modeled) | |||
Structural limit of the gear against aerodynamical forces. | |||
* vertical speed upon touchdown < 9 ft/sec (modeled) | |||
This is the structural limit of the main gear struts, and their destruction is fully modeled in 'realistic' mode. | |||
* airspeed upon drag chute deployment < 230 kt (modeled) | |||
The drag chute has a safety pin which disconnects the chute if the airspeed is higher than the stability limit. This is fully modeled. | |||
* roll speed of tires < 230 kt (not modeled) | |||
This is the certified maximal speed at which the tires don't blow. | |||
* derotation speed < 2 deg/s (modeled) | |||
This is the structural limit for the nose gear strut, and nose gear breakage is fully modeled. | |||
* AoA < 15 deg on touchdown (modeled) | |||
Beyond this angle, the body flap and tail structure of the orbiter touch the ground before the main gear does. | |||
[[File:Shuttle-approach06.jpg|600px|thumbnail|none|Touchdown and drag chute deployed]] | [[File:Shuttle-approach06.jpg|600px|thumbnail|none|Touchdown and drag chute deployed]] | ||