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Space Shuttle: Difference between revisions
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→Control cross couplings
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Control surface effectiveness in general drops with increasing Mach number, however the speed at which this happens is different for elevons and rudder. | Control surface effectiveness in general drops with increasing Mach number, however the speed at which this happens is different for elevons and rudder. | ||
=== Entry and touchdown structural and aerodynamical limits === | |||
The following structural and aerodynamical limits need to be observed during entry and landing: | |||
* Dynamical pressure qbar < 819 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 actual operations the orbiter should be kept below 650 lb/sqf. | |||
* Peak temperature < 2900 F (not 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. Currently this limit is not checked since the modeling of the entry temperature is too rough. | |||
== Glossary of acronyms == | == Glossary of acronyms == | ||