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The concept has also been used to extend the reentry time for vehicles returning to Earth from the Moon, which would otherwise have to shed a large amount of velocity in a short time and thereby suffer very high heating rates. The Apollo Command Module also used what is essentially a skip re-entry, as did the Soviet Zond and Chinese Chang'e 5-T1.
Early reentry-vehicle concepts visualized in shadowgraphs of high speed wind tunnel tests. The concept of the ablative heat shield was described as early as 1920 by Robert Goddard: "In the case of meteors, which enter the atmosphere with speeds as high as 30 miles (48 km) per second, the interior of the meteors remains cold, and the erosion is due, to a large extent, to chipping or cracking of ...
A reentry capsule is the portion of a space capsule which returns to Earth following a spaceflight. The shape is determined partly by aerodynamics ; a capsule is aerodynamically stable falling blunt end first, which allows only the blunt end to require a heat shield for atmospheric entry .
The Space Shuttle (and prior program) flight controllers worked relatively brief periods: The several minutes of ascent, the few days the vehicle was in orbit, and reentry. The duration of operations for Space Shuttle flight controllers was short and time-critical. A failure on the Shuttle could leave flight controllers little time for talking ...
The satellite designs also required that the Space Shuttle have a 4.6 by 18 m (15 by 60 ft) payload bay. NASA evaluated the F-1 and J-2 engines from the Saturn rockets, and determined that they were insufficient for the requirements of the Space Shuttle; in July 1971, it issued a contract to Rocketdyne to begin development on the RS-25 engine.
Space Shuttle Columbia, thought to be spaceworthy despite damage incurred during this liftoff, was destroyed by it upon re-entry.. Spaceworthiness, [1] [2] or aerospaceworthiness, [3] is a property, or ability of a spacecraft to perform to its design objectives and navigate successfully through both the space environment and the atmosphere as a part of a journey to or from space.
The R-bar pitch maneuver (RPM), popularly called the rendezvous pitch maneuver or backflip, [1] was a maneuver performed by the Space Shuttle as it rendezvoused with the International Space Station (ISS) prior to docking. The Shuttle performed a backflip that exposed its heat-shield to the crew of the ISS that made photographs of it. Based on ...
The space program of the Philippines is currently maintained by the Philippine Space Agency (PhilSA) together with various agencies under the Department of Science and Technology (DOST). The space program includes space research and development, and is funded through the National SPACE Development Program (NSDP) by the DOST and received an ...