Shuttle Carrier Aircraft
Boeing 747s adapted to carry Space Shuttle orbiters
The Shuttle Carrier Aircraft (SCA) are two extensively modified Boeing 747 airliners that NASA used to transport Space Shuttle orbiters. One (N905NA) is a 747-100 model, while the other (N911NA) is a short-range 747-100SR. Both are now retired.
The SCAs were used to ferry Space Shuttles from landing sites back to the Shuttle Landing Facility at the Kennedy Space Center. The orbiters were placed on top of the SCAs by Mate-Demate Devices, large gantry-like structures that hoisted the orbiters off the ground for post-flight servicing then mated them with the SCAs for ferry flights.
In approach and landing test flights conducted in 1977, the test shuttle Enterprise was released from an SCA during flight and glided to a landing under its own control.
Design and development
The Shuttle Carrier Aircraft (SCA) was proposed early in the Space Shuttle's development as a solution to the logistical challenges of transporting the orbiters after each mission across the continental United States from their landing site in Edwards Air Force Base in California to the launch site in Kennedy Space Center in Florida. The Lockheed C-5 Galaxy was considered for the shuttle-carrier role by NASA but rejected in favor of the 747. This was due to the 747's low-wing design in comparison to the C-5's high-wing design, and also because the U.S. Air Force would have retained ownership of the C-5, while NASA could own the 747s outright. Lockheed had also proposed a heavily modified twin body C-5, to counter the Conroy Virtus concept.
The first aircraft, a Boeing 747-123 registered N905NA, was originally manufactured for American Airlines.
The public source identifies “Shuttle Carrier Aircraft” as boeing 747s adapted to carry Space Shuttle orbiters. This brief keeps that definition visible, then builds a research path around Shuttle, Carrier and Aircraft.
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The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Aug 12, 2026. The linked authority identifier is Q218990. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1977.
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This entry incorporates text from “Shuttle Carrier Aircraft” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.