Автор Salo, 23.02.2015 09:43:06
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ЦитатаULA's Vulcan Rocket To be Rolled out in Stages by Mike Gruss -- April 13, 2015 ULA CEO Tory Bruno unveils the company's proposed Vulcan rocket during an April 13 press conference at the Space Symposium in Colorado Springs. Credit: Tom Kimmell for Space Foundation. COLORADO SPRINGS, Colo. -- United Launch Alliance unveiled an incremental approach to replace its workhorse Atlas 5 rocket, an ambitious path forward that ultimately would include a new second stage and, later, reusable first-stage engines that would be captured midair by helicopter after each mission.The plan would provide a competitive alternative to SpaceX's low-cost Falcon 9 rocket but entails risk for ULA as it funds a significant development program for as many as nine years as its competition gains momentum.Tory Bruno, ULA's president and chief executive, declined to detail the company's exact investment in the project but suggested that new rockets typically cost about $2 billion to develop, including the main engine. During an April 13 press conference on the eve the 31st Space Symposium here, he said that cost would be borne by ULA and its strategic partners, but that the company would not turn down government money if that becomes available.The first step in the developing the newly named Vulcan rocket is developing a new first stage featuring the methane-fueled BE-4 engine by Blue Origin of Kent, Washington. ULA is also working with Aerojet Rocketdyne on the AR-1 engine, in case the BE-4 runs into delays.The program is driven by the requirement to replace the Russian-built RD-180 engine that serves as the main powerplant for ULA's Atlas 5. Congress imposed a ban on future use of Russian engines in U.S. national security missions following Russia's annexation of Crimea from Ukraine last year.In addition to the new engine, the Vulcan's first stage would feature a stretch version of the tank used on ULA's Delta 4 rocket, which the company is phasing out in 2018 because it is too expensive. The second stage of the initial Vulcan version, slated to debut around 2019, would feature the same Centaur upper stage and fairing now used on the Atlas 5, Bruno said.The Vulcan could be augmented by up to six solid rocket boosters, giving it greater lift capability than the largest version of the Atlas 5 but not as much as the Delta 4 Heavy, which features three core stages in a side-by-side configuration. Bruno said he plans to issue a request for proposals within the next 12 months for the large boosters, which would likely be built by either Orbital ATK or Aerojet Rocketdyne.ULA told the Air Force in February it plans to start two separate U.S. Air Force certification processes for the rocket later this year, one with the BE-4 and one with the AR-1. Certification is required for the Vulcan to carry U.S. national security payloads.Bruno said ULA's first choice is the BE-4 but that it continues to fund the AR-1 work as a backup option, and that ULA will make a final decision on in 2016.The next step in Vulcan's evolution is a new upper stage known as the Advanced Cryogenic Evolved Stage, or ACES, which could be able to operate in space for weeks at a time, ULA officials said. This would open up a whole new range of missions to the Vulcan, ULA officials said.The ACES stage would have anywhere from one to four cryogenic engines, depending on the mission. The candidate engines are: a new variant of the RL10 produced by Aerojet Rocketdyne and currently used on both the Atlas 5 and Delta 4; Blue Origin's BE-3; and an engine being jointly developed with XCOR aerospace.ULA will sel ect the engine for the ACES stage in the next few years, Bruno said.ACES, ULA officials said, would have "almost unlimited burns" and extend on-orbit operating time from hours to weeks. The liquid-oxygen/liquid hydrogen-fueled stage would recycle excess fuel for attitude control and other purposes, ULA officials said.Aerial RecoveryUltimately, ULA plans to reuse the Vulcan's first stage engines through a process called Sensible Modular Autonomous Return Technology. After first-stage burnout, the two engines would be severed fr om the tank and deploy an inflatable heat shield to slow their re-entry. They then would deploy steerable parachutes, which would slow their descent enough so they could be recovered in mid-air by a helicopter.Once recovered, the engines would be re-certified and used again. The reusability feature is especially important as engines make up about two-thirds of the rocket's cost, ULA officials said. Bruno has said he hopes to drive the cost of the standard Vulcan rocket down to about $100 million.ULA hopes to introduce the ACES upper stage in 2023 and the reusable first stage in 2024, Bruno said.
ЦитатаInnovative next generation launch system will provide country's most reliable, affordable, and accessible launch service.
ЦитатаSam Grey пишет: Да, чтоб наглядней было:
Цитатаsnek пишет: ЦитатаSam Grey пишет: Да, чтоб наглядней было:После этого масковская баржа уже не кажется таким уж цирком с конями.
ЦитатаULA is monitoring Blue Origin's progress and has Aerojet Rocketdyne's AR-1 kerosene engine as a replacement option, if necessary.
ЦитатаIn step two, the Centaur second stage will be replaced by the more powerful ACES in 2023. With the addition of ACES, Vulcan will achieve the current capability of the Delta IV Heavy, which carries the largest payloads for our most critical customers.
ЦитатаNext Generation Launch SystemWith the introduction of the Vulcan, ULA's next generation launch system (NGLS), ULA is transforming the future of space launch -- making it more affordable, accessible, and commercialized -- and innovating to develop solutions to the nation's most critical need: reliable access to space.Unleashing Mankind's Potential in SpaceMore capabilities in space mean more capabilities here on Earth. By making it more affordableto conduct launches, Vulcan will open up brand new opportunities for the nation's use of space.Simple and AffordableThe NGLS offers our customers unprecedented flexibility in a single system. From low Earth orbit (LEO) to Pluto, the single-core NGLS does it all. This simple design is more cost-efficient for all customers, whether defense and national security, NASA science and human spaceflight, or commercial.American PowerThe NGLS will have an American engine, will offer the best value and with the introduction of the Advanced Cryogenic Evolved Stage (ACES) it will have greater capability than any other rocket on the market. In step one, with a planned initial launch capability in 2019, Vulcan will exceed the capability ofAtlas V, serving the vast majority of our customers' mission needs. Step one of the NGLS consists of single booster stage, the high-energy Centaur second stage and either a 4-meter or 5-meter-diameter payload fairing. Up to four solid rocket boosters (SRBs) augment the lift off power of the 4-meter configuration, while up to six SRBs can be added to the 5-meter. In step two, the Centaur second stage will be replaced by the more powerful ACES in 2023. With the addition of ACES, Vulcan will achieve the current capability of the Delta IV Heavy, which carries the largest payloads for our most critical customers. Vulcan 4-meter-diameter Payload Fairing ConfigurationVulcan 5-meter-diameter Payload Fairing Configuration
ЦитатаДимитър пишет: и смотрелось би лучше.
ЦитатаSalo пишет: С ACES Ваша мечта осуществится и диаметры будут одинаковы.