Launch Complex 11 (LC-11) at

Cape Canaveral Space Force Station Cape Canaveral Space Force Station (CCSFS) is an installation of the United States Space Force's Space Launch Delta 45, located on Cape Canaveral in Brevard County, Florida. Headquartered at the nearby Patrick Space Force Base, the station ...

, Florida, is a launch complex used by Atlas missiles between 1958 and 1964. It is the southernmost of the launch pads known as

Missile Row Missile Row was a nickname given in the 1960s to the United States Space Force and NASA launch complexes at Cape Canaveral Space Force Station (CCSFS). Operated by the 45th Space Wing since 1949, it was the site of all pre-Apollo 8 manned launch ...

. When it was built, it, along with complexes 12, 13 and 14, featured a more robust design than many contemporary pads, due to the greater power of the Atlas compared to other rockets of the time. It was larger, and featured a concrete launch pedestal that was tall and a reinforced

blockhouse A blockhouse is a small fortification, usually consisting of one or more rooms with loopholes, allowing its defenders to fire in various directions. It is usually an isolated fort in the form of a single building, serving as a defensive stro ...

. The rockets were delivered to the launch pad by a ramp on the southwest side of the launch pedestal. Thirty-two

Atlas B The SM-65 Atlas was the first operational intercontinental ballistic missile (ICBM) developed by the United States and the first member of the Atlas rocket family. It was built for the U.S. Air Force by the Convair Division of General Dy ...

, D, E and F missiles were launched on suborbital test flights from LC-11. The first launch to use the complex was Atlas 3B, the first flight of a complete Atlas, which was launched on 19 July 1958. In addition to the suborbital tests, one

orbit In celestial mechanics, an orbit is the curved trajectory of an object such as the trajectory of a planet around a star, or of a natural satellite around a planet, or of an artificial satellite around an object or position in space such as a p ...

al launch was conducted from the complex. On 18 December 1958, Atlas 10B launched SCORE, the world's first

communications satellite A communications satellite is an artificial satellite that relays and amplifies radio telecommunication signals via a transponder; it creates a communication channel between a source transmitter and a receiver at different locations on Earth. C ...

, into

low Earth orbit A low Earth orbit (LEO) is an orbit around Earth with a period of 128 minutes or less (making at least 11.25 orbits per day) and an eccentricity less than 0.25. Most of the artificial objects in outer space are in LEO, with an altitude never mor ...

. The area of LC-11 is currently leased to

Blue Origin Blue Origin, LLC is an American private spaceflight, privately funded aerospace manufacturer and sub-orbital spaceflight services company headquartered in Kent, Washington. Founded in 2000 by Jeff Bezos, the founder and executive chairman of Am ...

Explosions

Two on-pad explosions occurred on LC-11. The first was Missile 48D in April 1960, which suffered combustion instability and exploded on the pad. Although no specific cause for the combustion instability could be determined, the separate duct for the booster turbine exhaust had been removed from the Atlas pads at CCAS earlier in the year since it was considered unnecessary and complicated ground testing of the missiles. The failure occurred slightly under a month after Missile 51D had exploded on LC-13 due to combustion instability, and after these back-to-back failures, it was decided to put the exhaust duct back on the pads. Although there was no evidence indicating that the lack of the exhaust ducts caused the failures, program officials decided to play it safe, and in any case wanted the pads to conform with Atlas D silo configurations. The second explosion on LC-11 was when Missile 11F blew up one second after liftoff in April 1962 due to a turbopump failure. In both causes, pad damage was relatively light and LC-11 restored to use in two months.

Later history

Following the end of Atlas testing at Cape Canaveral, LC-11 was the only one of the four Atlas pads to not be used for space launches, and hence was first of the four pads to be deactivated. Following deactivation, the mobile service tower and support equipment were dismantled, and the site was unmaintained for over 50 years.

Blue Origin use

has leased the site to redevelop it for their use. On March 29, 2017, it was reported that Blue Origin has chosen LC-11 to conduct test firings of the

BE-4 The Blue Engine 4 or BE-4 is an oxygen-rich liquefied-methane-fueled staged-combustion rocket engine under development by Blue Origin. The BE-4 is being developed with private and public funding. The engine has been designed to produce of thr ...

engine. LC-11 is located near

Spaceport Florida Launch Complex 36 Launch Complex 36 (LC-36)—formerly known as Space Launch Complex 36 (SLC-36) from 1997 to 2010—is a launch complex at Cape Canaveral Space Force Station in Brevard County, Florida. It was used for Atlas (rocket family), Atlas launches by NASA ...

, which will support launches of Blue Origin's

New Glenn New Glenn is a heavy-lift orbital launch vehicle in development by Blue Origin. Named after NASA astronaut John Glenn, design work on the vehicle began in 2012. Illustrations of the vehicle, and the high-level specifications, were initial ...

Launch Vehicle, currently scheduled for a launch no-earlier then 2020. Throughout 2017, aerial / satellite imagery from Planet Explorer showed that construction of a new facility was underway there. In 2019 aerial photos showed a complete test stand. The test stands have two bays allow Blue Origin to test two engines at once.

References

Encyclopedia Astronautica - LC11
{{Merritt Island Cape Canaveral Space Force Station