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


Дата загрузки: 2017-05-20
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0.1/5
... 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: 2017-09-24
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0.39/5
...». В T+243 сек прошло выключение ЖРД RS 68A в боковых блоках, которые отделились пятью... успеш ным. Замечаний к работе двигателей RS 68A, которые были разработаны специально для... низированной тяжелой «Дельты» с новыми двигателями RS 68A. Стоит заметить, что стандартный вариант... испытанием но сителя c новыми двигателями RS 68A, разрабо танными фирмой Pratt & Whitney... Delta IV Heavy Upgrade. Исходный RS 68 проектировался как самый мощный... дви гатель шаттла SSME (RS 25). RS 68 эксплуатиру ется при уровне... в камере сгорания – 100 атм. Форсированный RS 68A развивает тягу 317.5 тс на..., то есть на 5.5 % больше, чем RS 68. Предполагает ся, что пропорционально... первого десятилетия нового ве ка. RS 68A успешно прошел первые огневые стендовые... до 102 % своего номинала. Всего RS 68A наработал на стенде 4800 сек... Том 22 ● ● ● Pratt & Whitney Rocketdyne, RS 68A специально разработан для тяжелого варианта... RS 68, и с 2015 г. все ракеты этого семейст ва начнут переводить на RS 68A... форсированной модификацией двигателя – вари антом RS 68B, предназначенным для установки как... в рамках закрытой ныне программы Constellation. RS 68B должен был развивать тягу... достижения таких пара метров в конструкцию RS 68 вносились много численные изменения... демон страционные испытания на переделанном RS 68 с заводским номером 10 009.... Известно также об изучении варианта RS 68K с регенеративным – а не абляционным – охлаж... же реальную жизнь обрел лишь RS 68А, летные испытания которого высоко...



Дата загрузки: 2017-09-24
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0.39/5
... Improved Engine Health Monitoring –RS-68 • RS-68A Development for Heavy Upgrade Program... Approach: Upgrade the RS-68 • • • • New Version Designated RS-68A Additional Power Level... | 7 Fleet Standardization Program Leverages RS-68 Evolution Integrates RS-68A with Medium & Medium... M+(5,4) Booster Heavy Upgrade Program + RS-68A Upgraded Heavy RS-68A Fleet Standardization –No New...



Дата загрузки: 2017-09-24
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0.58/5
... (US) US Engine Engine-Out RS-68A RS-68B HR Existing Ares I US... B2 No 1 J2-X No RS-68B HR RS-68B HR Resized Ares...-10-A-4 No Yes RS-68B HR No US ----- RS-68B HR Existing... Isp (s) 2 x RS-68A 244 451,749 0% 2% 102% 663,000 365 2 x RS-68B HR... 30% 2% 108% 702,000 370 2 x RS-68B HR 234 451,749 0% 2% 108% 702,000 370 2 x RS-68B HR 234 451,749 0% 2% 108% 702,000 370 2 x RS-68B HR 234 451,749 0% 2% 108% 702,000 370 2 x RS-68B HR 234 451,749...) 1 x RS-68A 328 451,749 0% 2% 102% 57% 102% 663,000 408.8 1 x RS-68B...% 60% 108% 702,000 415 1 x RS-68B HR 315 451,749...% 60% 108% 702,000 415 1 x RS-68B HR 315 451,749...% 60% 108% 702,000 415 1 x RS-68B HR 315 451,749...% 60% 108% 702,000 415 1 x RS-68B HR 315 451,749... and operation (primarily increasing the RS-68 nominal power level from...) Sea-Level Isp (s) 2 x RS-68A 244 451,749 0% 2% 102% 2 x RS-68B HR 180 349,082 30% 2% 108% 2 x RS-68B HR 234 451,749 0% 2% 108% 2 x RS-68B HR 234 451,749... Isp (s) LAS Jettison Time (nominal) 1 x RS-68A 328 451,749 0% 2% 102% 57...,000 370 Configuration 5 Configuration 6 2 x RS-68B HR 2 x RS-68B HR Vehicle Subsystem... DRM 4.5 4 Acceleration (g's) Case 1 3 Case 2 Case 3 2.5 1 x RS-68B HR 315 451,749...% 60% 108% 702,000 415 1 x RS-68B HR 315 451,749...% 60% 108% 702,000 415 1 x RS-68B HR 315 451,749... 285 Model Mission Subsystem Parameters 3.5 1 x RS-68B HR 242 349,082...% 60% 108% 702,000 415 1 x RS-68B HR 315 451,749... powered J2-X (compared to the RS-68) is utilized sooner thus...) earlier thus removing the three RS-68s as potential failure sources... Planned (HUG) Core/Strap-on RS-68A Engine Upperstage (US) US Engine... Human-Rated Core/Strap-on RS-68B HR Engine Upperstage (US... Human-Rated Core/Strap-on RS-68B HR Engine Upperstage (US... Human-Rated Core/Strap-on RS-68B HR Engine New Human... Human-Rated Core/Strap-on RS-68B HR Engine Upperstage (US... Human-Rated Core/Strap-on RS-68B HR Engine Upperstage (US...



Дата загрузки: 2017-04-23
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0.04/5
...-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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0.12/5
... 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: 2017-09-24
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0.13/5
.... The current build cycle for RS-68s is four years from... RS-68 to RS-68A, or the anticipated change from an RS-68A to an RS-68A... the first flight of the RS-68A in 2012 are already on... with minimal risk associated with RS-68A. 5. Delta Human Rating Schedule The.... System LV Redundancy/ Safety Upgrades RS-68A+ Recert Quals Hot Fire Testing... release of burning H2 at RS-68 start. Also, in some cases different redundancy upgrades (RS-68 backup valves, feedline prevalves... significant consideration. System Avionics System RS-68A RL-10B-2 Initiative ECU Upgrade...



Дата загрузки: 2017-09-24
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0.41/5
.... The current build cycle for RS-68s is four years from... RS-68 to RS-68A, or the anticipated change from an RS-68A to an RS-68A... the first flight of the RS-68A in 2012 are already on... with minimal risk associated with RS-68A. 5. Delta Human Rating Schedule The.... System LV Redundancy/ Safety Upgrades RS-68A+ Recert Quals Hot Fire Testing... release of burning H2 at RS-68 start. Also, in some cases different redundancy upgrades (RS-68 backup valves, feedline prevalves... significant consideration. System Avionics System RS-68A RL-10B-2 Initiative ECU Upgrade...



Дата загрузки: 2017-03-10
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0.11/5
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: 2017-09-24
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0.53/5
... of Exceptional Leadership of the RS-68A Engine Development Program, Enabling Initiation... Resolution of the Delta IV / RS-68 DSP-23 Observation and..., used Successfully for the RS-68 and RS-68A Engine System Loads, and... to Success of the RS-68 and RS-68A Test Programs 7 OUTSTANDING ENGINEERING... For Outstanding Contributions to the RS-68 Igniters Upgrade, Fabrication, and... for Continued Excellence in the RS-68 Materials Application Process For... Process Integration of the RS-27, RS-68, and RS-68A Liquid Propulsion Rocket... For Outstanding Performance as the RS-68 Risk Management Lead, Ares... Award Mymy Dao Project Leader RS-68A First Test Pratt & Whitney Rocketdyne...