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Redstone Test Stand
please note:
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Background
Liquid-propellant rocket development has always proceeded in three steps:- Engine testing
- Static rocket testing
- Test launches.
Early development, 1952â1955
(File:Detail of Instrumentation and Control Tanks c 1959 HAER AL-129-A sheet 6 of 7.png|thumb|left|200px| Drawings of buried railroad tanker vessels used as bunkers for instrumentation and control. Note periscopes in right tank)The first twelve missiles were built at Redstone Arsenal. Assembly of the first Redstone began in the fall of 1952. Engineers needed a propulsion test stand to improve the missile, but they were not allowed to spend research and development funds on constructing facilities even for a cause vital to national security. Rather than wait for funding to go through the two-year Congressional appropriation process, then wait further for construction, Fritz A. Vandersee designed an interim test stand for $25,000, the maximum amount allowed. The large concrete foundation cost nearly all of the money. On this base, welders built a small stand with metal salvaged from around the arsenal. Three railroad tank cars that had been used to transport chemicals at the arsenal during the war were cleaned, modified, and buried {{convert|300|ft|m}} away to serve as control and observation bunkers. To view the firings, the tanks also contain two periscopes believed to have been from two surplus Army tanks.(File:Redstone Test Stand bunker.jpg|thumb|right|Bunker entrance in 2017)When workers assembled the first Redstone missile at Redstone Arsenal in spring of 1953, the Redstone Interim Test Stand stood ready. A crane hoisted the missile (without the warhead) onto the stand and placed a frame atop the missile. Cables were attached to the frame to steady the missile. After extensive tests, workers fueled the missile and fired the engine for tests lasting no more than 15 seconds. After several successful test runs, the missile went to Cape Canaveral Air Force Station for the test flight. Launches provided valuable information on the guidance system, but most improvements on the propulsion system came from lessons learned at the Interim Test Stand, where engineers could evaluate the internal workings of the propulsion system while it was firmly anchored to the ground. A total of fourteen tests were performed with the first four missiles.(File:Redstone Test Stand and Missile Test 02 047018pu.jpg|thumb|right|150px| Redstone Test Stand during gmissile test #02)Before congressional appropriation and construction of permanent facilities was completed, the engineers used the information gained during static testing at the Interim Stand to steadily improve the Redstone system. The next eight missiles stood for twenty-two tests. The tower to the left of the missile (shown (:File:Redstone Test Stand.jpg|above right)) is the Cold Calibration Unit, built in 1954. It held only the Redstone's alcohol and liquid oxygen tanks, pumps, valves and flow meters in various configurations. The liquids flowed into another set of tanks and were used to test and calibrate the valves and flow meters to assure that accurate measurements were made during the static fire testing and to assure a proper alcohol to oxygen mixture ratio. Oxygen-rich propellant mixtures had caused most engine explosions in the early years of liquid rocket development.In the original version of the facility, flames were directed in a trench beneath the rocket in two opposite directions. In December 1955, workers installed a new more durable elbow-shaped flame deflector designed by Rocketdyne engineer Carl Kassner. Water injected through small holes in the elbow quickly turned to steam, keeping the flame away from the metal elbow.Army Ballistic Missile Agency, 1956â1958
The Army Ballistic Missile Agency (ABMA) was established on February 1, 1956 to turn the experimental Redstone rocket into an operational weapon and to develop a new Jupiter Intermediate Range Ballistic Missile (IRBM).The Redstone missile development continued with routine missile qualification tests and several improvements were made to the Interim Test Stand. A load cell was added to directly measure the thrust of the missile. A cutoff system was added to detect rough combustion in the engine and automatically stop tests. This system prevented engine damage while engineers solved the problem. The first Redstone built by Chrysler was tested at the Interim Stand. ChryslerVIDEO , built thirty-eight developmental Redstone missiles and all sixty-three tactical Redstones in Detroit. In addition, several of the Redstone missiles were modified to aid the Jupiter missile development program. These longer missiles were called Jupiter-C and test fired on the Interim Stand after it was enlarged and strengthened. A series of tests using propellants chilled to {{convert|â25|F|C}} established that the Redstone could be deployed in the Arctic.In 1957 the permanent Propulsion and Structural Test Facility was finally completed using the funds appropriated by Congress for the Redstone, but the ABMA decided to continue using the Interim Test Stand for the Redstone. After four years of development, the interim facilities had proven adequate for testing the Redstone and Jupiter-C, and the Army felt that a move to the new facilities would be disruptive to its busy schedule.(File:Juno I awaiting launch with Explorer I.jpg|thumb|right|200px| Juno I awaiting launch with Explorer I)Dr. von Braun had proposed to Project Orbiter using a Redstone as the main booster for launching artificial satellites on June 25, 1954. The day Sputnik 1 launched, October 4, 1957, von Braun had been showing incoming Defense Secretary Neil McElroy around the Redstone Arsenal. They received the news about Sputnik as they relaxed that afternoon. Von Braun turned to McElroy. "We could have been in orbit a year ago," he said. "We knew they [the Soviets] were going to do it! Vanguard will never make it. We have the hardware on the shelf⦠We can put up a satellite in 60 days." McElroy was not confirmed until the next week and did not have the power to back their proposal. On November 8, McElroy directed the Army to modify two Jupiter-C missiles and to place a satellite in orbit by March 1958.The first stage was soon test fired.Eighty-four days later, on January 31, 1958, the ABMA launched the first US satellite, Explorer I, into orbit. Following this successful launch, five more of these modified Jupiter-C missiles (subsequently re-designated Juno I) were launched in attempts to place additional Explorer satellites in orbit. During this satellite program, the Department of the Army gathered a great deal of knowledge about space. Explorer I gathered and transmitted data on atmospheric densities and the earth's oblateness. It is primarily remembered, though, as the discoverer of the Van Allen cosmic radiation belt.Because of its proven reliability and accuracy, the Department of Defense decided to use the Redstone missile in tests to study the effects of nuclear detonations in the upper atmosphere, Operation Hardtack I. After being static-fired at the Interim Stand in January 1958, two missiles were shipped to the Pacific Test Range. In July and August, the missiles became the first missiles ever to detonate atomic warheads.In 1958, Redstone development ended and Chrysler began mass production for deployment. Only a few of these missiles were tested at the Interim Test Stand because the propulsion system had become so reliable.Mercury-Redstone, 1959â1960
(File:Mercury Capsule at Redstone Test Stand.jpg|thumb|right|200px| Installation of a Mercury capsule on the Mercury-Redstone Test Booster (TB) for Full (110-116 sec) runs, May 1960)As the space race continued, the civilian space agency, NASA started on October 1, 1958 but the Army kept von Braun and the ABMA for another year and a half. NASA's Project Mercury chose the "Old Reliable" Redstone, with its unmatched launch record, as America's first manned launch vehicle. Nevertheless, the Army had to make improvements for manned missions. The crew at the Interim Test Stand ran over 200 static firings to improve the Redstone propulsion system. In addition, all eight Mercury-Redstone launch vehicles endured a full duration acceptance test at the interim stand. On July 1, 1960, 4,670 people transferred from the ABMA to NASA forming the Marshall Space Flight Center (MSFC).The first test flight, Mercury-Redstone 1, occurred on November 21, 1960. After rising a few inches off the launch pad, electrical cables disconnecting in the wrong order caused the engine to shut down. The launch vehicle sustained minor damage and was returned to MSFC. Static fire testing on the Redstone Test Stand in February 1961 verified that repairs were successful. The second test launch, Mercury-Redstone 1A, was successful on December 19, 1960. On January 31, 1961, a chimpanzee named Ham flew into space on Mercury-Redstone 2. Another test flight, Mercury-Redstone BD, added to evaluate changes, confirmed the system was ready.Alan B. Shepard, Jr. became the first American in space on May 5, 1961. Mercury-Redstone 3 was a suborbital flight to an altitude of 115 miles and a range of 302 miles. This flight demonstrated that man was capable of controlling a space vehicle during periods of weightlessness and high accelerations. The last Mercury-Redstone flight, Mercury-Redstone 4,also a manned suborbital flight, carried Virgil I. Grissom to a peak altitude of 118 miles and safely landed him 303 miles downrange. The Redstone Test Stand contributed to the success of the first two Americans to fly in space.Epilogue
(File:Redstone Test Stand sign.jpg|thumb|right)The Redstone Test Stand phased out of use in October, 1961. After becoming rundown and littered, the site was restored for the US Bicentennial. A Redstone missile, which US Army Missile Command (MICOM) loaned to NASA, was installed on February 27, 1976.It was listed on the National Register of Historic Places as being nationally significant on May 13, 1976.Alabama Section, American Society of Civil Engineers declared it an Alabama Historic Civil Engineering Landmark in 1979.It was declared a National Historic Landmark on October 3, 1985.The Interim Test Stand is in good condition.See also
- List of National Historic Landmarks in Alabama
- List of German rocket scientists in the United States
- Sputnik crisis
Notes
{{Reflist|refs={{NRISref|2007a}}WEB,weblink
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(Missile) Test Stand|contribution-url=weblink|page = 7}}{{Citation|last = Bonenberger|year = 1996|title = Written Historical & Descriptive Data|url =weblink|access-date = July 1, 2011|format = TIFF|contribution= MSFC, Redstone Rocket (Missile) Test Stand|contribution-url=weblink|page = 8}}{{Citation|last = Bonenberger|year = 1996|title = Written Historical & Descriptive Data|url =weblink|access-date = July 1, 2011|format = TIFF|contribution= MSFC, Redstone Rocket (Missile) Test Stand|contribution-url=weblink|pages = 35â36}}{{Citation|last = Bonenberger|year = 1996|title = Written Historical & Descriptive Data|url =weblink|access-date = July 1, 2011|format = TIFF|contribution= MSFC, Redstone Rocket (Missile) Test Stand|contribution-url=weblink|page = 38}}{{Citation|last = Bonenberger|year = 1996|title = Written Historical & Descriptive Data|url =weblink|access-date = July 1, 2011|format = TIFF|contribution= MSFC, Redstone Rocket (Missile) Test Stand|contribution-url=weblink|page = 44}}{{Citation|last = Bonenberger|year = 1996|title = Written Historical & Descriptive Data|url =weblink|access-date = July 1, 2011|format = TIFF|contribution= MSFC, Redstone Rocket (Missile) Test Stand|contribution-url=weblink|pages = 43â47}}{{Citation|last = Bonenberger|year = 1996|title = Written Historical & Descriptive Data|url =weblink|access-date = July 1, 2011|format = TIFF|contribution= MSFC, Redstone Rocket (Missile) Test Stand|contribution-url=weblink|pages = 47â48}}{{Citation|last = Bonenberger|year = 1996|title = Written Historical & Descriptive Data|url =weblink|access-date = July 1, 2011|format = TIFF|contribution= MSFC, Redstone Rocket (Missile) Test Stand|contribution-url=weblink|pages = 53â62}}{{Citation|first = Michael E.|last = Pugh|year = 1995|section= Redstone Rocket Test Stand 1995, East Elevation|section-url =weblink|access-date = July 1, 2011|format = TIFF|title= MSFC, Redstone Rocket (Missile) Test Stand|url=weblink|id=HAER AL-129-A|at = 3 of 7 sheets|hdl = loc.pnp/hhh.al1184}}{{Citation|first = Michael E.|last = Pugh|year = 1995|section= Instrumentation and Control Tanks c. 1959|section-url =weblink|access-date = July 1, 2011|format = TIFF|title= MSFC, Redstone Rocket (Missile) Test Stand|url=https://www.loc.gov/pictures/item/al1184/ |id=HAER AL-129-A|at = 6 of 7 sheets|hdl = loc.pnp/hhh.al1184}}{{Citation|first = Amy E.|last = Vona|year = 1995|section= Test Stand and Rocket Evolution|section-url =weblink|access-date = July 1, 2011|format = TIFF|title= MSFC, Redstone Rocket (Missile) Test Stand|url=https://www.loc.gov/pictures/item/al1184/ |id=HAER AL-129-A|at = 7 of 7 sheets|hdl = loc.pnp/hhh.al1184}}{{Citation|first = Erin L.|last = Walsh|year = 1995|section= Redstone Rocket Test Stand 1995, East Elevation|section-url =weblink|access-date = July 1, 2011|format = TIFF|title= MSFC, Redstone Rocket (Missile) Test Stand|url=https://www.loc.gov/pictures/item/al1184/ |id=HAER AL-129-A|at = 3 of 7 sheets|hdl = loc.pnp/hhh.al1184}}WEB,weblinkweblink" title="web.archive.org/web/20120527164049weblink">weblink dead, May 27, 2012, History of the Redstone Missile System, Bullard, 1965, 14, WEB,weblinkweblink" title="web.archive.org/web/20120527164049weblink">weblink dead, May 27, 2012, History of the Redstone Missile System, Bullard, 1965, 23â32, WEB,weblinkweblink" title="web.archive.org/web/20120527164049weblink">weblink dead, May 27, 2012, History of the Redstone Missile System, Bullard, 1965, 35, WEB,weblinkweblink" title="web.archive.org/web/20120527164049weblink">weblink dead, May 27, 2012, History of the Redstone Missile System, Bullard, 1965, 41, WEB,weblinkweblink" title="web.archive.org/web/20120527164049weblink">weblink dead, May 27, 2012, History of the Redstone Missile System, Bullard, 1965, 53, WEB,weblinkweblink" title="web.archive.org/web/20120527164049weblink">weblink dead, May 27, 2012, History of the Redstone Missile System, Bullard, 1965, 140, WEB,weblinkweblink" 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References
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External links
- Aviation: From Sand Dunes to Sonic Booms, a National Park Service Discover Our Shared Heritage Travel Itinerary
- Marshall Space Flight Center
- weblink" title="web.archive.org/web/20080728083321weblink">Redstone Arsenal
- U.S. Space & Rocket Center
- 'Rocket Engine Test Stands' in Man in Space
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