File:Blunt body reentry shapes.png

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English: These four shadowgraph images represent early re-entry vehicle concepts. A shadowgraph is a process that makes visible the disturbances that occur in a fluid flow at high velocity, in which light passing through a flowing fluid is refracted by the density gradients in the fluid resulting in bright and dark areas on a screen placed behind the fluid. H. Julian Allen pioneered and developed the Blunt Body Theory which made possible the heat shield designs that were embodied in the Mercury, Gemini and Apollo space capsules, enabling astronauts to survive the firey re-entry into Earth's atmosphere. A blunt body produces a shockwave in front of the vehicle--visible in the photo--that actually shields the vehicle from excessive heating. As a result, blunt body vehicles can stay cooler than pointy, low drag vehicles.
Català: Diverses formes de cons de reentrada.
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: Shadowgraph Images of Re-entry Vehicles - GPN-2000-001938.jpg
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Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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Date/TimeThumbnailDimensionsUserComment
current17:57, 6 October 2011Thumbnail for version as of 17:57, 6 October 20112,472 × 2,090 (3.35 MB)Soerfm (talk | contribs)Cropped high res
13:20, 3 October 2011Thumbnail for version as of 13:20, 3 October 20113,011 × 2,328 (4.15 MB)Soerfm (talk | contribs)Higher resolution
13:33, 27 July 2007Thumbnail for version as of 13:33, 27 July 2007375 × 350 (88 KB)Solerb (talk | contribs){{Information |Description=Diverses formes de cons de reentrada |Source=NASA |Date= |Author= |Permission= |other_versions= }}

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