1,360
edits
Space Shuttle: Difference between revisions
Jump to navigation
Jump to search
→Entry and touchdown structural and aerodynamical limits
| Line 364: | Line 364: | ||
The following structural and aerodynamical limits need to be observed during entry and landing: | The following structural and aerodynamical limits need to be observed during entry and landing: | ||
* Dynamical pressure qbar < | * Dynamical pressure qbar < 375 lb/sqf (modeled) | ||
This is a structural limit for the orbiter and the airfoils, beyond this the actuators can no longer move the airfoils, leading to a loss of control. In | This is a structural limit for the orbiter and the airfoils, beyond this the actuators can no longer move the airfoils, leading to a loss of control. In nominal operations the orbiter should be kept below 250 lb/sqf. | ||
* Peak temperature < 2900 F ( | * Peak temperature < 2900 F (modeled) | ||
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 | 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. | ||
* gear extension speed < 312 KEAS (modeled) | * gear extension speed < 312 KEAS (modeled) | ||