Двигательная установка. RS-68A. [Редактировать]

Данный двигатель был разработа компанией Rocketdyne. Технологически RS-68A заимствует многие компоненты у двигательной установки Спейс Шатла  RS-25. Однако, в ходе заимстования многие детали были упрощены, что привело к снижению трудоемкости с 50 до 14 млн. долл. за один двигатель. Изделие требует на 80 процентов меньше деталей чем RS-25 и на 92 процента меньше трудоемкости при сборке. Основные различичя между установками лежат в области турбонасосного агрегата. В то время как ТНА RS-25 требует сборки 170 и 200 комплектующих для насосов окислителя и топлива соответственно, новый двигатель требует только 40 и 25. RS-68 использует при работе простой газо генераторный цикл. При этом, двигатели также отличаются тем, что RS-68A является одноразовым изделием.

Технические характеристики

#ХарактеристикаЗначение
1Длина, метра5.2
2Тяга (земля), кНьютон3137
3Тяга (вакум), кНьютон3560
4Удельный импульс (вакум), с414
5Удельный импульс (уровень моря), с362
6Время работы, секунд328
7Масса, кг6747.64
8Диаметр, метра2.43
9Давление (в камере сгорания), бар196
10Степень расширения сопла21.5
11Соотношение (компонентов топлива)5.97
12Возможность изменения тяги, процентов57.5-108

Экономические характеристики

#ХарактеристикаДата измеренияЗначение
1Стоимость , млн. долл.14

Найдено 124 документов по запросу «RS-68A». [Перейти к поиску]


Дата загрузки: 2017-05-20
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0.29/5
... with entire guide Added upgraded RS-68A first-stage engine information (para... in Figure 1-3, consists of the RS-68A engine, LH2 tank, centerbody, LO2... is powered by the Rocketdyne RS-68A engine (Figure 1-4), a stateof-the-art... impulse of 411.9 sec. The RS-68A can throttle down to 55... the Space Shuttle Main Figure 1-4. RS-68A Engine Engine (SSME) and uses... burn primarily by vectoring the RS-68A hydrogen turbopump exhaust gases. Roll... Program (FSP) leverages the enhanced RS-68A first stage engine’s additional performance... in Section 5.2 (2) Descending Node Injection (3) RS-68A Engine Performance Reflected (4) Performance based... avionics channel consists of two RS-422 differential line receivers, one... with two, three, or more RS-68A engines per CBC. The second... Common Booster Core (CBC) with RS-68A 1 1 1 1 1 1 1 Helium Bottles (CBC On Board... 511/Equipment Shelf & RTU 509/RS-68 engine) 4-m Interstage 5-m Interstage 1 1 NA...



Дата загрузки: 2017-04-23
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0.05/5
...-stage, liquid-fueled vehicle. A single RS-27 engine fed with liquid... an upper-stage vehicle. The RS-68 engine, a product of Pratt..., this report profiles only the RS-68, because it is used... RS-68A engine. This engine is an upgrade of the RS-68 engine. RS-68A... of 70,000 feet. • 67 • RS-68A Xombie X-51A Federal Aviation Administration... Begins Certification Testing of the RS-68A Rocket Engine,” Pratt & Whitney press... Pump, courtesy XCOR (January 6, 2011). RS-68A, courtesy Pratt & Whitney (November 8, 2010...



Дата загрузки: 2017-05-20
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0.24/5
... Multi-Intelligence Vehicle First Flight RS-68 Liquid Air Insulation Improvement... team. For outstanding improvements to RS-68/68A, reducing liquid air insulation... outstanding dedication and integrity as RS-68 rocket engine mission lead... leadership and execution of the RS-68 Engine Control Unit recycle... Navigation for GPS-Denied Environments RS-25 Common Controller Project Northrop... algorithms. In recognition of the RS-25 Engine Control teams efforts... for the completion of RS-68 and RS-68A hardware producibility improvements Baldev...    DISTINGUISHED ENGINEERING PROJECT ACHIEVEMENT AWARDS RS-68 Ten-Pin ROFI Design...’s outstanding dedication and perseverance completing RS-68 MCC Igniter redesign and..., analyses and corrective actions of RS-68 crossover and main combustion..., corrective actions and resolutions of RS-68 main combustion chamber and... Team, Jet Propulsion Laboratory 2002 RS-68 Engine Development & Certification, Boing... Air System First Unmanned Catapult RS-68A First Flight Team Northrop Grumman... the inaugural flight of the RS-68A engine.  32  February 23, 2013... of the successful transition of RS-68 turbomachinery assembly from Canoga...



Дата загрузки: 2017-03-10
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0.09/5
Pratt & Whitney Rocketdyne Continues Tests on Department of Defense, NASA Engines Pratt & Whitney Rocketdyne - September 22, 2011 Pratt & Whitney Rocketdyne Continues Tests on Department of Defense, NASA Engines PR Newswire CANOGA PARK, Calif., Sept. 22, 2011 CANOGA PARK, Calif., Sept. 22, 2011 /PRNewswire/ -- In an impressive display of power and technology, Pratt & Whitney Rocketdyne successfully completed a series of hot-fire tests on the certified RS-68A engine, the world's most powerful hydrogen-fueled engine. The tests demonstrated the capability of the engine to operate for 4,800 seconds of cumulative run time – four times the design life of the engine and more than 10 times what's needed to boost a United Launch Alliance heavy-lift rocket into space. The tests took place at John C. Stennis Space Center in Mississippi. Pratt & Whitney Rocketdyne is a United Technologies Corp. (NYSE: UTX) company. "We are proud to celebrate this success with our United Launch Alliance customer on a test series that went above and beyond in demonstrating the robustness and reliability of the RS-68A engine," said Dan Adamski, RS-68 program manager, Pratt & Whitney Rocketdyne. "The RS-68A performed beautifully and as expected, and test results indicate no issues with the engine hardware, further demonstrating its readiness as a heavy-lift engine. The tests also provided invaluable data that improves our ability to predict the performance of the engine on launch day." The RS-68A is a liquid-hydrogen/liquid-oxygen booster engine designed to provide increased thrust and improved fuel efficiency for the Delta IV family of launch vehicles. It evolved from the RS-68 engine, which was developed and certified for commercial use entirely on private company funds. Each RS-68A will provide 702,000 pounds of lift-off thrust, or 39,000 more pounds of thrust than the RS-68 engine, with increased combustion efficiency as well. In addition to the successful margin demonstration testing of the RS-68A engine, Pratt & Whitney Rocketdyne, together with NASA, has begun testing on the upper-stage J-2X engine. To date, five hot-fire tests have been conducted on the J-2X, which could be used to boost humans beyond lowEarth orbit. Pratt & Whitney Rocketdyne, a part of Pratt & Whitney, is a preferred provider of high-value propulsion, power, energy and innovative system solutions used in a wide variety of government and commercial applications, including the main engines for the space shuttle, Atlas and Delta launch vehicles, missile defense systems and advanced hypersonic engines. Pratt & Whitney Rocketdyne is headquartered in Canoga Park, Calif., and has facilities in Huntsville, Ala.; Kennedy Space Center, Fla.; West Palm Beach, Fla.; Stennis Space Center, Miss; and Carlstadt, N.J. For more information about Pratt & Whitney Rocketdyne, go to www.prattwhitneyrocketdyne.com. Pratt & Whitney is a world leader in the design, manufacture and service of aircraft engines, space propulsion systems and industrial gas turbines. United Technologies, based in Hartford, Conn., is a diversified company providing high technology products and services to the global aerospace and commercial building industries. SOURCE Pratt & Whitney Rocketdyne



Дата загрузки: 2017-02-22
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0.06/5
...-stage, liquid-fueled vehicle. A single RS-27 engine fed with liquid... an upper-stage vehicle. The RS-68 engine, a product of Pratt..., this report profiles only the RS-68, because it is used... RS-68A engine. This engine is an upgrade of the RS-68 engine. RS-68A... of 70,000 feet. • 67 • RS-68A Xombie X-51A Federal Aviation Administration... Begins Certification Testing of the RS-68A Rocket Engine,” Pratt & Whitney press... Pump, courtesy XCOR (January 6, 2011). RS-68A, courtesy Pratt & Whitney (November 8, 2010...



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0.09/5
... core (CBC) consists of the RS-68A engine, the engine section and... is provided by the throttleable RS-68A engine system, designed and manufactured... Soto,CACA De Soto, • – RS-68 RS-68A Engine FabricationatatAerojet Rocketdyne De Soto... De Soto, CA Aerojet Rocketdyne • RS-68 at Aerojet Rocketdyne De... CA Brigham City,Fabrication UT • RS-68 Engine Fabrication at Rocketdyne De Soto, CA • RS-68 Engine Fabrication at Aerojet..., UT Brigham City,Fabrication UT • RS-68 Engine at Aerojet Rocketdyne... Engine Fabrication at Aerojet Rocketdyne 3 1 RS-68A Engine Ignition Liftoff (Thrust to...



Дата загрузки: 2017-03-09
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0.02/5
... shuttle main engine, and the RS-68 liquid rocket engine, showing... testing a F-1 J-2 RL10 LR87 LR91 SSME RS-68a 20 2250 1 Yes No No... time, s F-1 J-2 RL10 LR87 LR91 SSME RS-68 20 2250 112.5 165... philosophy executed for qualifying the RS-68 liquid rocket engine that... recommendations, Wood [6] reports that the RS-68 engine was subjected to... not been applied to the RS-68 although it was an... generator (GG) valve of the RS-68 or Vulcain 2; and 3) the... that was used for the RS-68 liquid rocket engine as... π8 Functional node representation of the RS-68 liquid rocket engine. To... of the SSME and the RS-68, respectively. The sensitivity study... metrics was analyzed for the RS-68 test case by varying... rocket engine, SSME, and the RS-68 liquid rocket engine. They... histories of the F-1, SSME, and RS-68 liquid rocket engines were... s of accumulated HFTD [37]. The RS-68 was qualified with... deduced for the F-1, SSME, and RS-68, and they were expressed... given in Table 7 for the RS-68. B. Express Hot-Fire Tests... by Biggs [37]. The F-1 and RS-68 data lack this kind... of roughly 90 s. Likewise, the RS-68 hot-fire testing groups... tank Functional nodes of the RS-68 mapped to physical components.../time philosophy applied to the RS-68 includes the principles of... testbed (ISTB) testing, and the RS-68 that includes GG component... are given in Tables 8–10 (RS-68 with AF of one... levels for the F-1, SSME, and RS-68 are listed in Table... has been reported for the RS-68, but the RAIV-based... reliability using the number of RS-68 liquid rocket engines used... suggest the conclusion that the RS-68 liquid rocket engine is... might be higher for the RS-68 since not all failure... GG and TCA valves, ox 6 (RS-68 with AF of five... 90% was used for the RS-68 engine [14]. E. Express Hardware... 18,945 Acc. denotes accumulated. 1): RS-68a Table 10 Multilevel BTDA Scope... 18 28 24 15 20 5): RS-68a Acc. hot-fire time, s wi... 18,945 Acc. denotes accumulated. RS-68 were defined through... bound 0.95 percentile F-1 SSME RS-68 (AF RS-68 (AF 0.9894 0.9825... capability b SSME, realistic test bogeyb RS-68 Total number of hardware... the estimation for the F-1 and RS-68 engines used noninformed priors... before the first launch. The RS-68 test case results in... for various reliability projection targets: RS-68 test case. STRUNZ AND... the F-1, the SSME, and the RS-68 that were based on..., B. K., “Propulsion for the 21st Century—RS-68,” 38th Joint Liquid Propulsion...



Дата загрузки: 2017-01-04
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0.08/5
... offset by additional RL10 and RS-68 production for HR Delta... IV H launch vehicle uses three RS-68 liquid engines for booster... mission, a variant of the current RS-68 is required. The only... ongoing and planned for the RS-68. DOD-funded Assured Access... reliability for the engine. Similarly, RS-68A development is an active NSS... increase the thrust of the RS-68 to 108 percent, resulting... and geosynchronous Earth orbit (GEO). RS-68B is a NASA-sponsored program... the development schedule of the RS-68B for Ares V and the... human-rate the RS-68B rather than the RS-68A. Further, this would... current Ares V design, a human-rated RS-68B is not required, since...-ratable.” Hence, human-rating the RS-68B would be feasible for... phase out the RS-68A in favor of the RS-68B given the..., human-rated qualification of the RS-68B will be necessary at... disadvantage to human-rating the RS-68B for use on an... or compress the schedule of RS-68B development by approximately one... the program. Human-rating the RS-68B adds requirements not necessary for a cargo-rated RS-68B. A representative list includes: 1) improving... both the variants of the RS-68 and all of the... Second Stage First Stage Engine RS-68A* Ares I Second Stage HR 4-Engine... Second Stage Second Stage Engine RS-68B RL10-B2* RL-60... RL10A4-2 Eliminated From Consideration HR RS-68B * Retained for Configuration 1 Only...-Out 1 Existing RS-68A Existing 1 RL10-B2 no 2 Humanrated RS-68B HR Ares I US 1 J-2X no 3 Humanrated RS-68B HR Resized Ares I US 1 J-2X no 4 Humanrated RS-68B HR New, human-rated 4 RL10-A-4-2 yes 5 Humanrated RS-68B HR No US -- -- 6 Humanrated RS-68B HR Existing 1 RL10-A-4-2 no ... stage, each with a human-rated RS-68B engine. Configuration 2 utilizes the... the redundancy requirements for the RS-68 engine, the details of... propulsive stage powered by six RS-68B engines and two STS... CBC and engine production. a. CBC b. RS-68 c. RL10 2. Potential for a common... MED +3 C Improved unit costs for RS-68 production Assure through contract... to increased CBC, RL10, and RS-68 production rates. However, the... first stage with a human-rated RS-68B engine. Configuration 2 utilizes the...). It was assumed that the RS-68B engine development program start... development of the human-rated RS-68B engine, or the new... production of the RL10 and RS-68 engines associated with HR... human-rated version of the RS-68B, to support HR Delta... human-rating activities into the RS-68B development program are included... to increased CBC, RL10, and RS-68 production rates. However, the... offset by additional RL10 and RS-68 production for HR Delta...



Дата загрузки: 2017-05-21
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0.04/5
... Core (CBC) powered by a PWR RS-68A main engine, one of two... (24,750) 110 (24,750) 1 x RS-68A -- 1 x RL10B-2 1 x RL10B-2 Aerojet Rocketdyne -- Aerojet... module) 12 x thrusters (command module) 4 x RS-88 abort engines LOX/alcohol...



Дата загрузки: 2017-01-04
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0.09/5
... core (CBC) consists of the RS-68A engine, the engine section and... is provided by the throttleable RS-68A engine system, designed and manufactured... Soto,CACA De Soto, • – RS-68 RS-68A Engine FabricationatatAerojet Rocketdyne De Soto... De Soto, CA Aerojet Rocketdyne • RS-68 at Aerojet Rocketdyne De... CA Brigham City,Fabrication UT • RS-68 Engine Fabrication at Rocketdyne De Soto, CA • RS-68 Engine Fabrication at Aerojet..., UT Brigham City,Fabrication UT • RS-68 Engine at Aerojet Rocketdyne... Engine Fabrication at Aerojet Rocketdyne 3 1 RS-68A Engine Ignition Liftoff (Thrust to...