FS-1996-04-29-LaRC
April 1996
The five-year program was a modest first step. Shepard's flight had been overshadowed by Russian Yuri Gagarin's orbital mission just three weeks earlier. President Kennedy and the Congress were concerned that America catch up with the Soviets. Seizing the moment created by Shepard's success, on May 25, 1961, the President made his stirring challenge to the nation -- that the United States commit itself to landing a man on the moon and returning him to Earth before the end of the decade. Apollo was to be a massive undertaking -- the nation's largest technological effort.
The first home of Project Mercury was Langley Research Center in Hampton, Va. More significantly, most of the leadership for Project Mercury and, later, Gemini and Apollo, were Langley engineers. Until then, the Langley lab was not known to many outside the aerospace community.
NASA Langley Research Center photo #59-8027
Langley researchers conduct an impact study test of the Mercury capsule in the Back River in Hampton, Va.
Langley Research Center, established in 1917 as the National Advisory Committee for Aeronautics (NACA) Langley Memorial Aeronautical Laboratory, was the first U.S. civilian aeronautical research facility devoted to the advancement of the science of flight. Almost every aspect of flight was studied at Langley and, during World War II, at the request of the military, the Pilotless Aircraft Research Division (PARD) was begun. Aiding the military's development of pilotless aircraft was how researchers at Langley first got interested in the problems of space exploration. Learning the techniques associated with building, instrumenting, launching and monitoring rockets and missiles later proved essential to the American space program and Project Mercury.
Langley Research Center, established in 1917 as the National Advisory Committee for Aeronautics (NACA) Langley Memorial Aeronautical Laboratory, was the first U.S. civilian aeronautical research facility devoted to the advancement of the science of flight. Almost every aspect of flight was studied at Langley and, during World War II, at the request of the military, the Pilotless Aircraft Research Division (PARD) was begun.
Aiding the military's development of pilotless aircraft was how researchers at Langley first got interested in the problems of space exploration. Learning the techniques associated with building, instrumenting, launching and monitoring rockets and missiles later proved essential to the American space program and Project Mercury.
As Project Mercury matured, the STG grew. By the summer of 1959, there were 400 people assigned to finish mission definition studies and begin the advanced engineering work. One small group was sent to Florida to ready NASA's manned launch site at the Atlantic Missile Range, while another group went to oversee the work of the prime spacecraft contractor McDonnell Aircraft Corp. in St. Louis. While more plans for space exploration were being mapped out, NASA made arrangements to expand its facilities. Gilruth wanted Langley to be the main center but their were other contenders. The two main sites under consideration were in Massachusetts and Texas. In the end, the Manned Spacecraft Center, now the Johnson Space Center, was built in Houston. As construction was completed, Gilruth and the Space Task Group moved to Texas.
NASA Langley scientists and researchers had been working on a variety of rocket designs -- launch, guidance, automatic control and telemetry systems were all under development before Project Mercury took shape in 1958. The Little Joe and Big Joe were two important programs.
Little Joe was a solid-fuel rocket, and one of the earliest U.S. launch vehicles based on the principle of the clustered rocket engine. Langley's Maxime Faget and Paul Purser, who conceived and designed the four-cluster, solid-propellant booster, nicknamed the project Little Joe. The first successful launch of Little Joe occurred at Wallops Island, Va. in October 1959 - soaring 40 miles out over the Atlantic Ocean. The rocket was 50 feet tall and weighed 28,000 pounds. Little Joe's engines produced a total of 250,000 pounds of thrust at takeoff. Little Joe was of great importance to Project Mercury, carrying instrumented payloads to various altitudes, and allowing engineers to check the operation of the Mercury capsule escape rocket and recovery systems.
Little Joe rockets were also used to send two Rhesus monkeys, Sam and Miss Sam, into space in December 1959 and January 1960. In the nose cone of one Little Joe capsule, Sam flew 55 miles into space before returning. Sam provided flight engineers with a better idea of how the Mercury astronauts would fare on their subsequent flights.
NASA Langley Research Center photo #59-336
A full-scale model of the Mercury capsule being tested in the NASA Langley 30- by 60-Foot Full-Scale Wind Tunnel.
The Big Joe program involved ballistic tests of a Mercury capsule on an Atlas missile. Big Joe was a one-ton, full-scale instrumented mock-up of the proposed Mercury spacecraft, designed to test the effectiveness of the ablative heat shield and the aerodynamic characteristics of the capsule design. Big Joe was successfully launched on Sept. 9, 1959. The Big Joe project, from design to launch, was achieved in less than a year -- the first step in providing a launch vehicle for Project Mercury. Big Joe's launch atop an Atlas D booster showed that a capsule could be launched (100 miles into the air), separate from the Atlas rocket and fall back to Earth in conditions that closely simulated orbital reentry. It also proved to be an excellent exercise for military recovery teams and confirmed that the blunt-body capsule had performed as Langley wind-tunnel tests and other laboratory studies had predicted.
Communication sites were plotted, surveyed and built worldwide by various companies. The result was a system that could maintain constant radio communications with the orbiting Mercury astronauts. NASA Langley supervised the site contractors and, within two years, saw an "around-the-world-for-the-first-time" communications system power up. This was the foundation of the present Mission Control Center where state-of-the-art workstations allow project managers to simultaneously track numerous spacecraft and satellites.
NASA Langley Research Center photo # 90-4371
The original seven Mercury astronauts were from left, front row: Virgil "Gus" Grissom, Scott Carpenter, Donald "Deke" Slayton and Gordon Cooper; back row: Alan Shepard, Walter Schirra and John Glenn
Seven astronauts were chosen from among more than 100 men tested at Wright Air Development Center in Dayton, Ohio and Lovelace Clinic in Albuquerque, New Mexico. At that time, no one really knew how to select and train astronauts. The search process was rigorous but quickly focused on military test pilots. Langley engineer Charles Donlan and test pilot Robert Champine played important roles in the screening and selection process.
The "Original Seven" were: Air Force Capts. L. Gordon Cooper Jr., Virgil I. "Gus" Grissom, and Donald K. "Deke" Slayton; Navy aviators Lt. M. Scott Carpenter, Lt. Comdr. Alan B. Shepard Jr., and Lt. Comdr. Walter M. Schirra Jr.; and Lt. Col. John H. Glenn Jr., United States Marine Corps. The seven astronauts were sent to NASA Lang-ley to begin their training for spaceflight. Langley engineers with knowledge in reentry physics, astronomy, and celestial mechanics and navigation educated the astronauts in graduate level space sciences courses. Then each astronaut was assigned to a specific technical field to receive further training. Cooper and Slayton kept a liaison with the Army Ballistic Missile Agency (later Marshall Space Flight Center) and launch vehicle suppliers; Carpenter specialized in communications and navigation equipment; Glenn focused on cockpit layout; Grissom handled in-flight control systems; Schirra's specialty was life-support systems and pressure suits; and Shepard concentrated on tracking range and recovery systems.
The STG staff put the astronauts through several spaceflight simulation systems and techniques to familiarize them with the Mercury capsule and evaluate their effectiveness with the capsule control systems. A closed-loop analog simulator became the basis for several "spaceflights." This simulator had a simple chair with sidearm controller and rudder pedals and was later refitted with a three-axis controller and a molded couch individually made for each astronaut.
NASA Langley Research Center photo #59-4426
Molded astronaut couches line the Langley model shop wall. The names of the test subjects, all Langley employees, are written on the backs.
The training at Langley also included a regimen of physical exercise and scuba-diving operations designed to simulate weightlessness and the types of sensory disorientation that they might experience during reentry from space. In Langley's large hydrodynamics tank and in the Back River behind the Langley East Area, the Mercury astronauts also learned how to get out of the space capsule as it floated in the water.
Project Mercury Director Thanks NASA Langley for Its Project Work Project Mercury ended in the summer of 1963 after four successful orbital flights. The STG completed its move to the Manned Spacecraft Center in Houston, Texas, and NASA and the nation geared up for the Gemini and Apollo programs.
Dr. Robert R. Gilruth, head of Project Mercury at Langley, wrote to NASA Langley director Floyd Thompson: "It is fitting that the Manned Spacecraft Center express its sincere appreciation to the Langley Research Center for the invaluable contributions that the Center has played in our initial manned space flight program. The Manned Spacecraft Center owes much to Langley, since . . . Langley really was its birthplace."
Specific contributions that NASA Langley made to Project Mercury included assistance in the Big Joe program; implementation of the Little Joe program; the planning and carrying out of the Mercury tracking and ground instrumentation system; numerous aerodynamic, structural materials and component evaluation and development tests; engineering, shop instrumentation and logistic support for much of the Space Task Group in-house testing; and finally, administrative support and office space from late 1958 to mid-1962 when the STG moved to Houston. Gilruth wrote, "As you can see, all elements of the Langley Center provided major assistance to Project Mercury, and we are deeply grateful for this help."
NASA Langley Research Center photo #59-5790
Two technicians assemble a Little Joe capsule. The capsules were manufactured "in-house" by Langley technicians.
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