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Space Shuttle Enterprise
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- the content below is remote from Wikipedia
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{{short description|Space Shuttle test vehicle, used for glide tests}}{{DISPLAYTITLE:Space Shuttle Enterprise}}{{Use American English|date=January 2014}}{{Use mdy dates|date=November 2022}}- the content below is remote from Wikipedia
- it has been imported raw for GetWiki
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Differences between Enterprise and future shuttles
The design of Enterprise was not the same as that planned for {{OV|Columbia|full=no}}, the first flight model; the aft fuselage was constructed differently, and it did not have the interfaces to mount OMS pods. A large number of subsystemsâranging from main engines to radar equipmentâwere not installed on Enterprise, but the capacity to add them in the future was retained, as NASA originally intended to refit the orbiter for spaceflight at the conclusion of its testing. Instead of a thermal protection system, its surface was primarily covered with simulated tiles made from polyurethane foam. Fiberglass was used for the leading edge panels in place of the reinforced carbonâcarbon ones of spaceflight-worthy orbiters. Only a few sample thermal tiles and some Nomex blankets were real.WEB,weblink Space Shuttle, "Enterprise" OV-101, SI.edu, Smithsonian Institution, January 9, 2013, February 3, 2014,weblink" title="web.archive.org/web/20140203141927weblink">weblink dead, Enterprise used fuel cells to generate its electrical power, but these were not sufficient to power the orbiter for spaceflight.WEB,weblink Space Shuttle Enterprise (OV-101) Fact Sheet, Spaceline.org, Cliff, Lethbridge, 1998,weblink" title="web.archive.org/web/20110107024654weblink">weblink January 7, 2011, Enterprise also lacked reaction control system thrusters and hydraulic mechanisms for the landing gear; the landing gear doors were simply opened through the use of explosive bolts and the gear dropped down solely by gravity. As it was only used for atmospheric testing, Enterprise featured a large nose probe mounted on its nose cap, common on test aircraft because the location provides the most accurate readings for the test instruments, being mounted out in front of the disturbed airflow.Enterprise was equipped with Lockheed-manufactured zero-zero ejection seats like those its sister {{OV|Columbia|full=no}} carried on its first four missions.Construction milestones{| class"wikitable"
Service
File:The Shuttle Enterprise - GPN-2000-001363.jpg|thumb|Star Trek creator Gene Roddenberry (third from right, in dark brown), the Star Trek cast (with the exception of William ShatnerWilliam ShatnerConstruction began on Enterprise on June 4, 1974. Designated OV-101, it was originally planned to be named Constitution and unveiled on Constitution Day, September 17, 1976. Fans of (Star Trek: The Original Series|Star Trek) asked US President Gerald Ford, through a letter-writing campaign, to name the orbiter after the television show's fictional starship, USS Enterprise. White House advisors cited "hundreds of thousands of letters" from Trekkies, "one of the most dedicated constituencies in the country", as a reason for giving the shuttle the name. Although Ford did not publicly mention the campaign, the president said that he was "partial to the name" Enterprise, and directed NASA officials to change the name.WEB,weblink Enterprise (OV-101), NASA.gov, Kay, Grinter, October 3, 2000, November 28, 2007, dead,weblink" title="web.archive.org/web/20150326061638weblink">weblink March 26, 2015, NEWS,weblink Star Trek Fans Win on Space Shuttle, The Lewiston Daily Sun, Frances, Lewine, 20, September 6, 1976, March 5, 2011, January 1, 2022,weblink live, NEWS,weblink Declassified Memos Reveal Debate Over Naming the Shuttle "Enterprise", io9, Mark, Strauss, July 10, 2014, August 21, 2015, August 24, 2015,weblink" title="web.archive.org/web/20150824172529weblink">weblink live, In mid-1976 the orbiter was used for ground vibration tests, allowing engineers to compare data from an actual flight vehicle with theoretical models.On September 17, 1976, Enterprise was rolled out of Rockwell's plant at Palmdale, California. In recognition of its fictional namesake, Star Trek creator Gene Roddenberry and most of the principal cast of the original series of Star Trek were on hand at the dedication ceremony.BOOK, From Sawdust to Stardust: The Biography of DeForest Kelley, Star Trek's Dr. McCoy, Pocket Books, Terry Lee, Rioux, 2005, 221, 978-0743457620,Approach and landing tests (ALT)
File:HaiseandFullertonEnterprise.jpg|thumb|Fred Haise and Gordon FullertonGordon FullertonOn January 31, 1977, Enterprise was taken by road to Dryden Flight Research Center at Edwards Air Force Base to begin operational testing.WEB,weblink Space Shuttle Basics, NASA.gov, Kim, Dismukes, February 15, 2005, November 28, 2007, November 27, 2007,weblink" title="web.archive.org/web/20071127050452weblink">weblink dead, While at NASA Dryden Enterprise was used by NASA for a variety of ground and flight tests intended to validate aspects of the shuttle program.WEB,weblink Space Shuttle Approach and Landing Tests (ALT), NASA.gov, November 28, 2007, March 15, 2008,weblink" title="web.archive.org/web/20080315180758weblink">weblink dead, The initial nine-month testing period was referred to by the acronym ALT, for "Approach and Landing Test".WEB,weblink Shuttle Enterprise Free Flight, NASA.gov, 2000, November 28, 2007, dead,weblink" title="web.archive.org/web/20130307094536weblink">weblink March 7, 2013, These tests included a maiden "flight" on February 18, 1977, atop a Boeing 747 Shuttle Carrier Aircraft (SCA) to measure structural loads and ground handling and braking characteristics of the mated system. Ground tests of all orbiter subsystems were carried out to verify functionality prior to atmospheric flight.The mated Enterprise/SCA combination was then subjected to five test flights with Enterprise uncrewed and unactivated. The purpose of these test flights was to measure the flight characteristics of the mated combination. These tests were followed with three test flights with Enterprise crewed to test the shuttle flight control systems.On August 12, 1977, Enterprise flew on its own for the first time.WEB,weblink 1977 Year in Review: Space Shuttle Enterprise, UPI.com, United Press International, Bob, Futz, 1977, January 9, 2013, January 5, 2013,weblink" title="web.archive.org/web/20130105184202weblink">weblink live, Enterprise underwent four more free flights where the craft separated from the SCA and was landed under astronaut control. These tests verified the flight characteristics of the orbiter design and were carried out under several aerodynamic and weight configurations. The first three flights were flown with a tailcone placed at the end of Enterprise{{'s}} aft fuselage, which reduced drag and turbulence when mated to the SCA. The final two flights saw the tailcone removed and mockup main engines installed. On the fifth and final glider flight, pilot-induced oscillation problems were revealed, which had to be addressed before the first orbital launch occurred.File:Enterprise lifted.jpg|thumb|upright|A crane hoists Enterprise into the Dynamic Structural Test Facility to undergo dynamic testing in launch configuration.]]Mated Vertical Ground Vibration Test (MGVT)
Following the conclusion of the ALT test flight program, on March 13, 1978, Enterprise was flown once again, but this time halfway across the country to NASA's Marshall Space Flight Center (MSFC) in Alabama for the Mated Vertical Ground Vibration Testing (MGVT). The orbiter was lifted up on a sling very similar to the one used at Kennedy Space Center and placed inside the Dynamic Test Stand building, and mated to the Vertical Mate Ground Vibration Test tank (VMGVT-ET), which in turn was attached to a set of inert Solid Rocket Boosters (SRB) to form a complete shuttle launch stack, and marked the first time in the program's history that all Space Shuttle elements, an Orbiter, an External Tank (ET), and two SRBs, were mated together. During the course of the program, Enterprise and the rest of the launch stack would be exposed to a punishing series of vibration tests simulating as closely as possible those expected during various phases of launch, some tests with and others without the SRBs in place.BOOK, NASA Space Shuttle: 1981 onwards (all models): An Insight into the Design, Construction and Operation of the NASA Space Shuttle, Zenith Press, Owners' Workshop Manual, David, Baker, 2011, 978-0-7603-4076-9,Planned preparations for spaceflight
At the conclusion of this testing, Enterprise was due to be taken back to Palmdale for retrofitting as a fully spaceflight capable vehicle. Under this arrangement, Enterprise would be launched on its maiden spaceflight in July 1981 to launch a communications satellite and retrieve the Long Duration Exposure Facility, then planned for a 1980 release on the first operational orbiter, Columbia. Afterward, Enterprise would conduct two Spacelab missions.WEB,weblinkweblink" title="web.archive.org/web/20120326192250weblink">weblink March 26, 2012, What Shuttle Should Have Been: The October 1977 Flight Manifest, Wired.com, David S F, Portree, March 24, 2012, November 7, 2012, However, in the period between the rollout of Enterprise and the rollout of Columbia, a number of significant design changes had taken place, particularly with regard to the weight of the fuselage and wings. This meant that retrofitting the prototype would have been a much more expensive process than previously realized, involving the dismantling of the orbiter and the return of various structural sections to subcontractors across the country. As a consequence, NASA made the decision to convert an incomplete Structural Test Article, numbered STA-099, which had been built to undergo a variety of stress tests, into a fully flight-worthy orbiter, which became {{OV|Challenger|full=no}}.{| class="wikitable"|+ Planned orbital missionsPreparation for STS-1
(File:Enterprise KSC 1979.jpg|thumb|upright|Enterprise visited pad 39-A in launch configuration 20 months before the first Shuttle launch.WEB,weblink Shuttle Orbiter Enterprise on Launch Complex 39, NASA.gov, June 1, 1979, January 21, 2008, dead,weblink" title="web.archive.org/web/20071124130246weblink">weblink November 24, 2007, )Following the MGVT program and with the decision to not use Enterprise for orbital missions, it was ferried to Kennedy Space Center on April 10, 1979. By June 1979, it was again mated with an external tank and solid rocket boosters (known as a boilerplate configuration) and tested in a launch configuration at KSC Launch Complex 39A for a series of fit checks of the facilities there.After this period, Enterprise was returned to NASA's Dryden Flight Research Facility in September 1981.WEB,weblink Enterprise (OV-101), NASA.gov, October 3, 2000, November 7, 2012, dead,weblink" title="web.archive.org/web/20120515233902weblink">weblink May 15, 2012, In 1983 and 1984, Enterprise underwent an international tour visiting France, West Germany, Italy, the United Kingdom, and Canada. Enterprise also visited California, Alabama, and Louisiana (while visiting the 1984 Louisiana World Exposition). It was then used to fit-check the never-used shuttle launch pad at Vandenberg AFB, California from November 1984 to May 1985. On November 18, 1985, Enterprise was ferried to Washington, D.C., where it became property of the Smithsonian Institution and was stored in the National Air and Space Museum's hangar at Dulles International Airport.Post-Challenger
After the Challenger disaster, NASA considered using Enterprise as a replacement. Refitting the shuttle with all of the necessary equipment for it to be used in space was considered, but NASA decided to use spares constructed at the same time as {{OV|Discovery|full=no}} and {{OV|Atlantis|full=no}} to build {{OV|Endeavour|full=no}}.Post-Columbia
(File:Enterprise wing panel.jpg|thumb|Damage to the leading edge of the wing from the post-Columbia impact tests)In 2003 after the breakup of {{OV|Columbia|full=no}} during re-entry, the Columbia Accident Investigation Board conducted tests at Southwest Research Institute, which used an air cannon to shoot foam blocks of similar size, mass and speed to that which struck Columbia at a test structure which mechanically replicated the orbiter wing leading edge. They removed a section of fiberglass leading edge from Enterprise{{'s}} wing to perform analysis of the material and attached it to the test structure, then shot a foam block at it.NEWS,weblink Critical foam impact test planned for Thursday, Spaceflight Now, William, Harwood, June 4, 2003, July 12, 2007, September 29, 2007,weblink" title="web.archive.org/web/20070929083549weblink">weblink live, While the leading edge was not broken as a result of the test, which took place on May 29, 2003, the impact was enough to permanently deform a seal and leave a thin gap {{cvt|22|in|cm}} long.PRESS RELEASE,weblink Shuttle Leading Edge Foam Impact Test Update, Columbia Accident Investigation Board, May 29, 2003,weblink" title="web.archive.org/web/20030622092018weblink">weblink June 22, 2003, dead, NEWS,weblink Test supports theory foam doomed shuttle, USA Today, Traci, Watson, May 29, 2003, February 17, 2018, January 26, 2021,weblink live, NEWS,weblink NASA's Foam Test Offered A Vivid Lesson in Kinetics, The New York Times, John, Schwartz, June 5, 2003, February 17, 2018, February 18, 2018,weblink" title="web.archive.org/web/20180218090726weblink">weblink live, Since the strength of the reinforced carbonâcarbon (RCC) on Columbia is "substantially weaker and less flexible" than the test section from Enterprise, this result suggested that the RCC would have been shattered. A section of RCC leading edge from Discovery was tested on June 6, to determine the effects of the foam on a similarly aged leading edge, resulting in a {{cvt|3|in|cm|adj=on|spell=in}} crack on panel 6 and cracking on a T-shaped seal between panels 6 and 7.PRESS RELEASE,weblink Foam Impact Test Breaks Reinforced Carbon-Carbon Panel, Columbia Accident Investigation Board, Spaceref.com, June 6, 2003, February 17, 2018, CAIB PA 32-03, February 18, 2023,weblink live, JOURNAL,weblink On the Leading Edge, Technology Today, James D., Walker, Donald J., Grosch, 24, 3, 2â9, Fall 2003, 1528-431X, dead,weblink February 18, 2018, On July 7, using a leading edge from Atlantis and focused on panel 8 with refined parameters stemming from the Columbia accident investigation, a second test created a ragged hole approximately {{cvt|16|by|16|in|cm}} in the RCC structure.NEWS,weblink Foam impact test blows hole in shuttle wing panel, Spaceflight Now, William, Harwood, July 7, 2003, February 17, 2018, December 13, 2017,weblink dead, The tests clearly demonstrated that a foam impact of the type Columbia sustained could seriously breach the protective RCC panels on the wing leading edge.The board determined that the probable cause of the accident was that the foam impact caused a breach of a reinforced carbon-carbon panel along the leading edge of Columbia{{'s}} left wing, allowing hot gases generated during re-entry to enter the wing and cause structural collapse. This caused Columbia to tumble out of control, breaking up with the loss of the entire crew.NEWS,weblink Test Shows Foam Was Likely Cause of Shuttle's Loss, The New York Times, Wald, Matthew L., Schwartz, John, July 8, 2003, February 16, 2018, February 17, 2018,weblink" title="web.archive.org/web/20180217202840weblink">weblink live,Museum exhibit
{{multiple image| align = right| direction = vertical| width = 250| image1 = Space shuttle enterprise.jpg| alt1 = Enterprise on display in a black hangar filled with other space artifacts including the tops of Mercury and Gemini capsules, rockets and satellites, a Manned Maneuvering Unit, and other space artifacts. An American flag hangs on the wall of the hangar in the back. The Shuttle is resting on its landing gear with the payload bay doors closed, and museum visitors are kept away by stanchions. 13 visitors are visible in this picture, one group is wearing matching yellow shirts. There is ample room for more visitors.Washington, D.C.
From 1985 to 2003, Enterprise was stored at the Smithsonian's hangar at Washington Dulles International Airport before it was restored and moved to the Smithsonian's newly built National Air and Space Museum Steven F. Udvar-Hazy Center at Washington Dulles, where it was the centerpiece of the space collection.WEB,weblink Shuttle Enterprise at Center of Museum's Space Hangar, NASA.gov, Jim, Wilson, October 29, 2004, November 28, 2007, March 6, 2019,weblink live, On April 12, 2011, NASA announced that {{OV|Discovery|full=no}}, the most traveled orbiter in the fleet, would replace Enterprise in the Smithsonian's collection once the Shuttle fleet was retired, with ownership of Enterprise transferred to the Intrepid Sea, Air & Space Museum in New York City. On April 17, 2012, Discovery was transported by Shuttle Carrier Aircraft to Dulles from Kennedy Space Center, where it made several passes over the Washington D.C. metro area.NEWS,weblink Discovery Departs Kennedy Space Center, NASA.gov, Anna, Heiney, April 17, 2012, April 17, 2012, April 19, 2012,weblink" title="web.archive.org/web/20120419055006weblink">weblink live, NEWS,weblink Space shuttle Discovery makes final flight over Washington D.C., The Washington Post, Brian, Vastag, April 18, 2012, April 19, 2012, April 19, 2012,weblink" title="web.archive.org/web/20120419055930weblink">weblink live, After Discovery had been removed from the Shuttle Carrier Aircraft, both orbiters were displayed nose-to-nose outside the Steven F. Udvar-Hazy Center before Enterprise was made ready for its flight to New York.WEB,weblink When Enterprise Met Discovery, Camusci, Tiffany, August 31, 2018, National Air and Space Museum, Smithsonian Institution, January 9, 2020, July 21, 2019,weblink live,New York
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Gallery
File:Enterprise 1977 Approach and Landing Test mission patch.png|Enterprise ALT program logoFile:Space Shuttle Enterprise 747 separation.ogv|Space Shuttle Enterprise 747 separationFile:S79-31980.jpg|Enterprise makes its first appearance mated with an external tank and SRBs en route to Pad 39A at the Kennedy Space CenterFile:Space Shuttle Enterprise in launch configuration.jpg|Enterprise at SLC-6 at Vandenberg AFBFile:Space Shuttle Enterprise Move to Intrepid (201206060005HQ) DVIDS724620.jpg|Enterprise enroute to its new home aboard USS IntrepidFile:Space Shuttle Enterprise Move to Intrepid (201206060012HQ) DVIDS723125.jpg|Enterprise underway on the Hudson RiverFile:Shuttle Enterprise Flight to New York (201204270023HQ).jpg|Enterprise over New York. The Intrepid Sea, Air & Space Museum, Enterprise{{'s}} present home, can be seen belowFile:Space Shuttle Enterprise 2018.jpg|Enterprise at the Intrepid Sea, Air & Space Museum in 2018See also
- Buran (spacecraft)
- List of human spaceflights
- List of Space Shuttle crews
- List of Space Shuttle missions
- National Register of Historic Places listings in Manhattan from 14th to 59th Streets
- Space Shuttle Pathfinder
- Timeline of Space Shuttle missions
References
{{Reflist}}Attribution
{{Include-NASA}}External links
{{Commons category|Space Shuttle Enterprise}}- Enterprise (OV-101) {{Webarchive |url=https://web.archive.org/web/20160303192118weblink |date=March 3, 2016 }} at NASA.gov
- Enterprise (OV-101) Approach and Landing Test (1977)
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- "Space Shuttle Enterprise" does not exist on GetWiki (yet)
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