Launch Complex 39B

Launch Complex 39B Launch Complex 39B is a multi-user launch pad at Kennedy Space Center on Merritt Island, Florida, managed by the National Aeronautics and Space Administration and used for crewed and uncrewed missions since the late 1960s. The pad supported the Apollo program, Space Shuttle program, and returned to heavy-lift operations for the Artemis program, serving as a focal point for launch infrastructure upgrades involving commercial partners such as Boeing, Northrop Grumman, and SpaceX. Located in proximity to Launch Complex 39A, Pad 39B has undergone successive conversions to accommodate vehicles from the Saturn V to the Space Launch System.

History

Constructed during the Space Race era to support the Apollo program, the site adjacent to Cape Canaveral Space Force Station was excavated and assembled under contracts with Bechtel, Grumman, and other aerospace contractors. During the 1970s, the pad was reconfigured for the Space Shuttle infrastructure, incorporating hardware that connected to the Vehicle Assembly Building and the Crawler-transporter. The pad hosted Space Shuttle Columbia-era preparations and later remained idle through parts of the 2000s until revitalization efforts linked to the Constellation program planning and subsequent decisions tied to the Space Policy Directive and budget actions by the United States Congress.

Design and Facilities

The complex features a flame trench, mobile service tower, and a fixed pad crest that interface with the Vehicle Assembly Building, the Crawlerway, and ground support equipment supplied by NASA centers and contractors. Key structures include the launch platform, propellant storage and distribution systems compatible with liquid hydrogen and liquid oxygen propellants used on vehicles like the Saturn V and the Space Launch System, plus umbilical towers adapted for different vehicle designs by entities such as United Launch Alliance and Aerojet Rocketdyne. The pad’s telemetry, command, and data handling systems link to Mission Control Center operations at Johnson Space Center and range safety coordination with the Eastern Range.

Launch Operations and Notable Missions

Early operations supported the crewed Apollo 10 and subsequent lunar missions including Apollo 11-era hardware flow through the complex logistics network involving the KSC Launch Complex, contractor integration at Marshall Space Flight Center, and astronaut processing at Neil Armstrong-era facilities. During the Space Shuttle program, the pad adapted flow procedures from STS-1 preparations and launch countdown sequencing coordinated with the Kennedy Space Center Launch Control Center. In the 21st century the pad was chosen for launches of heavy-lift test flights such as Artemis 1, employing the Space Launch System core stage and upper stage combinations supplied by Lockheed Martin and partners, with range safety and flight tracking provided by NASA Glenn Research Center-linked assets.

Modifications and Upgrades

Major modifications occurred when converting the pad from Saturn V to Space Shuttle operations, including installation of the fixed service structure and payload changeout room by contractors like Turner Construction Company. Later modernization for the Artemis program required demolition and reconstruction of the mobile service tower and enhancements of propellant plumbing, cryogenic conditioning, and lightning protection systems, with engineering contributions from Jacobs Engineering Group and Raytheon. Upgrades also addressed environmental compliance with National Environmental Policy Act-driven assessments and coordination with United States Fish and Wildlife Service regarding the nearby Canaveral National Seashore.

Future Plans and Use

Planned future use emphasizes multi-user access for NASA and commercial providers including Boeing’s proposed human-rated systems, deep-space cargo launches by United Launch Alliance variants, and potential small-satellite rideshares coordinated with SpaceX and Blue Origin. The site features in long-term architecture studies for lunar and Mars campaign logistics coordinated with Johnson Space Center and strategic initiatives from the White House space policy offices. Continued investments are subject to budgeting by the United States Congress and program decisions by NASA headquarters, with environmental reviews and regional infrastructure coordination with the Brevard County and Florida state agencies.

Category:Kennedy Space Center Category:Spaceports in the United States