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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 .
Mercury-Atlas 6 (MA-6) was the first crewed American orbital spaceflight, which took place on February 20, 1962. [4] Piloted by astronaut John Glenn and operated by NASA as part of Project Mercury, it was the fifth human spaceflight, preceded by Soviet orbital flights Vostok 1 and 2 and American sub-orbital flights Mercury-Redstone 3 and 4.
Separation of HTV Small Re-entry Capsule (HSRC) from Kounotori 7 was confirmed at 21:24 UTC. Estimated time of the reentry to Earth atmosphere (at 120 km altitude) of Kounotori 7 was 21:38 UTC, and the splashdown of residual debris at 21:48 - 22:12 UTC. [31]
He then kept control until the g-forces peaked at 11.6g during re-entry; he held the capsule until it had stabilized and then relinquished control to the automated system. The descent was faster than anticipated, but the parachutes deployed as planned, a drogue at 21,000 ft (6.4 km) and a main parachute at 10,000 ft (3.0 km). [25] [33]
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 ...
(ASCS) detects beginning of reentry and rolls capsule at 10 deg/s to stabilize capsule during reentry. T+00:09:38 Drogue Parachute Deploy Drogue parachute deployed at 22,000 ft (6,700 m) slowing descent to 365 ft/s (111 m/s) and stabilizing capsule. T+00:09:45 Snorkel Deploy Fresh air snorkel deploys at 20,000 ft (6,100 m).
The re-entry capsule and orbiter will then travel back to Earth’s orbit and separate, allowing the re-entry capsule to make its expected return later this month to the Siziwang Banner Landing ...
This provided a rotational moment during reentry, angling the capsule and providing some lift (a lift to drag ratio of about 0.368 [13]). The capsule was then steered by rotating the capsule using thrusters; when no steering was required, the capsule was spun slowly, and the lift effects cancelled out.