Kennedy Space Center Launch Complex 39
Launch Complex 39 is a rocket launch site at the John F. Kennedy Space Center on Merritt Island in Florida, United States. The site and its collection of facilities were originally built as the Apollo program's "Moonport" and later modified for the Space Shuttle program.
Launch Complex 39 consists of three launch sub-complexes or "pads"—39A, 39B, and 39C—a Vehicle Assembly Building, a Crawlerway used by crawler-transporters to carry mobile launcher platforms between the VAB and the pads, Orbiter Processing Facility buildings, a Launch Control Center which contains the firing rooms, a news facility famous for the iconic countdown clock seen in television coverage and photos, and various logistical and operational support buildings.
SpaceX has leased Launch Complex 39A from NASA since 2014 and has modified the pad to support Falcon 9 and Falcon Heavy launches.
NASA began modifying Launch Complex 39B in 2007 to accommodate the now defunct Constellation program, and is currently prepared for the Artemis program, which was first launched in November 2022. A pad to be designated 39C, which would have been a copy of pads 39A and 39B, was originally planned for Apollo but never built. A smaller pad, also designated 39C, was constructed from January to June 2015, to accommodate small-lift launch vehicles.
NASA launches from pads 39A and 39B have been supervised from the NASA Launch Control Center, located from the launch pads. LC-39 is one of several launch sites that share the radar and tracking services of the Eastern Test Range.
History
Early history
Northern Merritt Island was first developed around 1890 when a few wealthy Harvard University graduates purchased and constructed a three-story mahogany clubhouse, very nearly on the site of Pad 39A. During the 1920s, Peter E. Studebaker Jr., son of the automobile magnate, built a small casino at De Soto Beach north of the Canaveral lighthouse.In 1948, the Navy transferred the former Banana River Naval Air Station, located south of Cape Canaveral, to the Air Force for use in testing captured German V-2 rockets. The site's location on the East Florida coast was ideal for this purpose, in that launches would be over the ocean, away from populated areas. This site became the Joint Long Range Proving Ground in 1949 and was renamed Patrick Air Force Base in 1950 and Patrick Space Force Base in 2020. The Air Force annexed part of Cape Canaveral, to the north, in 1951, forming the Air Force Missile Test Center, the future Cape Canaveral Space Force Station. Missile and rocketry testing and development would take place here through the 1950s. Later on, an "Orbital Launch Platform" for Starship with plans to accommodate two landing zones for Falcon 9 and Falcon Heavy rockets to conduct to "Return-to-launch-site" landings.
After the creation of NASA in 1958, the CCAFS launch pads were used for NASA's civilian uncrewed and crewed launches, including those of Project Mercury and Project Gemini.
Apollo and Skylab
In 1961, President Kennedy proposed to Congress the goal of landing a man on the Moon by the end of the decade. Congressional approval led to the launch of the Apollo program, which required a massive expansion of NASA operations, including an expansion of launch operations from the Cape to adjacent Merritt Island to the north and west. NASA began acquisition of land in 1962, taking title to by outright purchase and negotiating with the state of Florida for an additional. On July 1, 1962, the site was named the Launch Operations Center.Initial design
The need for a new launch complex was first considered in 1961. At the time, the highest-numbered launch pad at CCAFS was Launch Complex 37. A proposed Launch Complex 38 had been set aside for the future expansion of the Atlas-Centaur program, but ultimately never built. The new complex was thus designated Launch Complex 39.The method of reaching the Moon had not yet been decided. The two leading alternatives were direct ascent, which launched a single huge rocket; and Earth orbit rendezvous, where two or more launches of smaller rockets would place several parts of the lunar departure spacecraft which would be assembled in orbit. The former would require a huge Nova-class launcher and pads, while the latter would require several rockets to be launched in quick succession. Furthermore, the selection of the actual rockets was still ongoing; NASA was proposing the Nova design while their newly-acquired former Army group in Huntsville Alabama had proposed a series of slightly smaller designs known as Saturn.
This complicated the design of the launch complex, as it had to encompass two very different possibilities and rockets. Accordingly, early designs from 1961 show two sets of launch pads. The first was a series of three pads for Saturn along Playalinda Beach, with the southernmost near the current Eddy Creek Boat Launch, and the northernmost around Klondike Beach. Far to the south was a similar set of three pads for Nova, the southernmost just south of the Astronaut Beach House and the northern roughly at the location of the current Pad A.
The final selection of lunar orbit rendezvous and the Saturn V led to numerous changes. The Nova pads disappeared, and the three Saturn pads were moved southward. The southernmost was now at the current location of Pad A, while the northernmost was located between Patrol Road, the current boundary road for the LC39 site, and Playlandia Beach Road on the north. At the time, the original three were named from north to south: Pad A through Pad C. The pads were evenly spaced apart to avoid damage in the event of an explosion on a pad.
In March 1963, plans were formalized to build only two of the three pads; the northernmost, furthest from the VAB, would not be built but reserved for future expansion. As the original Pad A would no longer be built, the naming was changed to run south-to-north, so that the two pads that would be built would be A and B. If the original 39A at the north end were ever built, it would now be known as 39C.
Some consideration for C's construction was made: the Crawlerway initially splits off from A toward B running north-northwest, and then bends north toward B a short distance north at Cochran Cove. Continuing straight north-northeast would have led to C after a similar northward bend. The original construction of the Crawlerway included an interchange between B and a short part of the extension northward for C, which remains intact, and the traffic-light warning system for the Crawlerway has lights for Pad C.
The plans still set aside room for the remaining two pads, now known as D and E. Pad D would have been built due west of Pad C, some distance inland along Patrol Road. Access to D would have branched off westward from the crawlerway at the point where C's crawlerway turned north. Pad E would have continued the line of pads along the coast, north of C near Playalinda Beach, close to the original location of the southernmost pad in the original layout. No diagram of the access to E can be found. Had all of them been built, C, D and E would have formed a triangle.
Integration of space vehicle stack
Months before a launch, the three stages of the Saturn V launch vehicle and the components of the Apollo spacecraft were brought inside the Vehicle Assembly Building and assembled, in one of four bays, into a -tall space vehicle on one of three Mobile Launchers. Each Mobile Launcher consisted of a two-story, launcher platform with four hold-down arms and a Launch Umbilical Tower topped by a crane used to lift the spacecraft elements into position for assembly. The ML and unfueled vehicle together weighed.The umbilical tower contained two elevators and nine retractable swing arms that were extended to the space vehicle—to provide access to each of the three rocket stages and the spacecraft for people, wiring, and plumbing—while the vehicle was on the launch pad and were swung away from the vehicle at launch. Technicians, engineers, and astronauts used the uppermost Spacecraft Access Arm to access the crew cabin. At the end of the arm, the white room provided an environmentally controlled and protected area for astronauts and their equipment before entering the spacecraft.
Early diagrams of the proposed layout also included the Nuclear Assembly Building, NAB, northeast of the VAB. These would be used to prepare the nuclear rocket engines being developed under the NERVA program, before moving them to the VAB for assembly into a rocket stack. This program was cancelled and the NAB was not built.