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FlightGear Newsletter June 2015: Difference between revisions
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[[File: Shuttle OMS full.jpg|600px|Orbital Maneuvering System in action]] | [[File: Shuttle OMS full.jpg|600px|Orbital Maneuvering System in action]] | ||
Systems modeling is also proceeding well. The highlight is a complete simulation of the orbiter's heat balance, including incident radiation from Sun and Earth, internal sources and heat sinks and heat transfer between different parts of the Shuttle. This allows now fairly complex maneuvers. For instance, by bringing the Shuttle into a tail-towards-sun attitude, the radiative heating of the cabin is minimized. This allows the freon coolant to remain a long time in the radiator as it only needs to deal with waste heat from avionics and not from solar heating, leading to a low temperature inside the freon loop. This can later be utilized as a heat sink during atmospheric entry when the radiator can not be deployed - with the freon soaked cold to about 240 K, almost 15 minutes worth of heat can be dealt with without using any other heat sink equipment: | |||
[[File:Shuttle coldsoak.jpg|600px|Cold-soaking the Shuttle's freon loops in preparation for de-orbit.]] | |||
=== New Furs for the Piper J-3 Cub === | === New Furs for the Piper J-3 Cub === | ||