Space Shuttle Orbiter

Space Shuttle orbiters are a type of spaceplane component for partially and fully reusable orbital spacecraft systems that have been apart of the discontinued U.S. Space Shuttle program, and still active, Soviet Buran orbiter program, and the Chinese orbiter program. There have been nineteen total first generation space shuttle orbiters since 1979.
== U.S. Space Shuttle program ==
President Johnson approved of the space shuttle program in 1970 in addition to several additions to the U.S. space effort on the Moon, in orbit, and space probes to other celestial bodies in the Solar System.
=== NASA/JPL orbiters ===
==== Constitution-class (first generation shuttle orbiters): OV-100 series ====
Constitution-class shuttle orbiters were introduced in 1979 and were thought to have a ten-year use, they were retired in 2000. 
# Constitution
# Challenger
# Columbia
# Discovery
# Atlantis
# Endeavour
# Resolution
=== U.S. Air Force orbiters ===
U.S. Air Force orbiters differed from NASA/JPL orbiters in that the Air Force orbiters have iconography from their organization as well as white fuel tanks and filament wound case solid rocket boosters. The USAF follows the civilian program closely and replaces their shuttles within one year of the civilian programs.
==== Constitution-class (first generation shuttle orbiters): OV-150 variants ====
OV-150 variants introduced in 1981 and retired in 2001.
# America
# Independence
# Liberty
==== X-35 (second generation shuttle orbiters): OV-200 series ====
X-35 shuttle orbiters were introduced in 1999 as a replacement for the retiring Constitution-class shuttle orbiters, they were retired in 2020.
==== X-35: OV-250 variants ====
OV-250 variants were introduced in 2000 and retired in 2020.
OV-250s were the first participants of SORIN (pronounced Soarin') or squad orbital insertion, a concept first proposed in the early 2000s by the USAF, USSC and the USMC to deploy a squad of seven Marines via remote-controlled spaceflight to any location on Earth within two hours notice. 
https://en.wikipedia.org/wiki/SUSTAIN_(military) 
==== X-37C (third generation shuttle orbiters): OV-300 series ====
X-37C shuttle orbiters were introduced in 2010 as a supplement to the X-35 shuttle orbiters, they are still active with NASA/JPL.
==== X-37C: OV-350 variants ====
OV-350 variants were introduced in 2011 and are still in active service with the USAF.
==== OV-400 series (fourth generation shuttle orbiter) ====
OV-400 shuttle orbiters were outfitted to IE-type explorers, they were introduced in 2020.
== German Space Shuttle program ==
# Sternenreiter (Star Rider)
# Himmelstrumer (Skyrocket)
# Sonnenfanger (Sun Catcher)
# Nachthimmel (Night Sky)
# Feuerflugel (Fire Wings)
== Russian Space Shuttle program ==
# Buran "snowstorm/blizzard"
# Ptichka "little bird"
# Burya "tempest"
# Vodovorot "maelstrom"
# Zima "winter"
== Chinese Space Shuttle program ==
Astronaut program starts in the 1970s with Soyuz-based spacecraft. 1980s/1990s are full of Chinese space accomplishments they achieved in the OTL 2000s/2010s.
# Chun Tian "spring"
# Xia Tian "summer"
# Qui Tian "autumn"
# Dong Tian "winter"
Category:Spacecraft
Category:United States
Category:China
Category:Russians
Category:United States government