Editing Atmospheric entry (section)

=== NASA HIAD ===
Following the success of the initial IRVE experiments, NASA developed the concept into the more ambitious Hypersonic Inflatable Aerodynamic Decelerator (HIAD). The current design is shaped like a shallow cone, with the structure built up as a stack of circular inflated tubes of gradually increasing major diameter. The forward (convex) face of the cone is covered with a flexible thermal protection system robust enough to withstand the stresses of atmospheric entry (or reentry).<ref name = HughesOverview>{{cite web
 |url          = https://solarsystem.nasa.gov/docs/9.2%20Hughes%20Hypersonic%20Inflatable%20Aerodynamic%20Decelerator%20(HIAD)%20Technology%20Development%20Overview.pdf
 |title        = Hypersonic Inflatable Aerodynamic Decelerator (HIAD) Technology Development Overview
 |last         = Hughes
 |first        = Stephen J.
 |website      = www.nasa.gov
 |publisher    = NASA
 |access-date  = 28 March 2017
 |archive-url  = https://web.archive.org/web/20170126043753/http://solarsystem.nasa.gov/docs/9.2%20Hughes%20Hypersonic%20Inflatable%20Aerodynamic%20Decelerator%20(HIAD)%20Technology%20Development%20Overview.pdf
 |archive-date = 26 January 2017
 |url-status   = dead
}}</ref><ref name = Cheatwood2016>{{cite web
 |url          = https://www.nasa.gov/sites/default/files/atoms/files/gcd_industryday_hiad.pdf
 |title        = Hypersonic Inflatable Aerodynamic Decelerator (HIAD) Technology
 |last         = Cheatwood
 |first        = Neil
 |date         = 29 June 2016
 |website      = www.nasa.gov
 |publisher    = NASA
 |access-date  = 28 March 2017
 |archive-date = February 24, 2017
 |archive-url  = https://web.archive.org/web/20170224080715/https://www.nasa.gov/sites/default/files/atoms/files/gcd_industryday_hiad.pdf
 |url-status   = live
}}</ref>

In 2012, a HIAD was tested as Inflatable Reentry Vehicle Experiment 3 (IRVE-3) using a sub-orbital sounding rocket, and worked.<ref>{{Cite web|url=http://www.ulalaunch.com/uploads/docs/Published_Papers/Supporting_Technologies/LV_Recovery_and_Reuse_AIAASpace_2015.pdf|title=''Launch Vehicle Recovery and Reuse ''|access-date=January 10, 2018|archive-date=July 6, 2016|archive-url=https://web.archive.org/web/20160706013800/http://www.ulalaunch.com/uploads/docs/Published_Papers/Supporting_Technologies/LV_Recovery_and_Reuse_AIAASpace_2015.pdf|url-status=live}}</ref>{{rp|8}}

See also [[Low-Density Supersonic Decelerator]], a NASA project with tests in 2014 and 2015 of a 6 m diameter SIAD-R.