sexta-feira, 5 de junho de 2015

NASA Looks to Cut Travel Time to Mars in Half with Superfast Propulsion

Hello reader!

It follows an article published day (06/04), in the website, noting that NASA looks to cut Travel Time to Mars in half with Superfast Propulsion.

Duda Falcão


NASA Looks to Cut Travel Time to
Mars in Half with Superfast Propulsion

by Staff Writers
Moscow (Sputnik) Jun 04, 2015

Aerojet Rocketdyne is working on advanced
solar-electric propulsion systems (SEP) that
will make transporting cargo to Mars more
affordable and efficient.
As NASA begins laying the foundations for a future mission to Mars, the Agency wants to use its partnership with a rocket and missile propulsion manufacturer to cut travel time to the Red Planet in half.

The California-based Aerojet Rocketdyne has teamed up with NASA several times in the past, starting in 1976 when it helped the space agency deliver the Mars Viking landers. Now it seems the company's groundbreaking work on propulsion systems will forward NASA's mission of sending humans to Mars.

During a visit to the company's facilities in Canoga Park, California, NASA administrator Charlie Bolden stressed the need for the latest and most advanced propulsion technologies in getting astronauts to Mars. He also reiterated NASA's hope to slash the future mission's travel time.

"Right now, it's about an eight-month mission," he told reporters at the facility. "We'd like to cut that in half."

Bolden discussed the possibility with Aerojet Rocketdyne President Scott Seymour and Vice President of Advanced Space and Launch Systems Julie Van Kleeck, the three of them focusing primarily on the potential of superfast propulsion technology.

NASA officials have stressed the value of the technology, as it would help limit astronauts' exposure to radiation and reduce the amount of food and water the mission would require.

Aerojet Rocketdyne is working on advanced solar-electric propulsion systems (SEP) that will make transporting cargo to Mars more affordable and efficient.

"We're now trying to get to higher levels," Seymour said, referring to the engines his company is building for NASA's robotic missions. "Fifteen kilowatts would be the next step, and then to cluster them together...then, in the long term, 50 to 100 kilowatts."

"The limiting power of this type of propulsion has been the power to drive it," Bolden added.

"Aerojet Rocketdyne has partnered with different entities around the country in looking [at] how to get more energy density into a solar cell. The more power we can get, the larger we can make the engine and its capability."

The trio also discussed more advanced space propulsion systems, including nuclear rockets, such as the Nuclear Engine for Rocket Vehicle Performance (NERVA), a system studied by NASA decades ago.

"This country did a lot of work on that back in the 1960s and 1970s, and there is some technology being looked at regarding the fuels aspects of that, to make it lower cost and safer for the future," Van Kleeck noted.

Bolden also took the opportunity to emphasize the need for investing more into these advanced space systems, calling them potential "game changers" for more than just the mission to Mars.

"You've got to be specific," he said. "If I say I want game-changing in-space propulsion, everyone will go back to [the idea of] moving cargo. I want industry to focus on getting people to move really fast. I think we can do far better than we are doing today, but we've got to show our commitment by putting some money into it."

Comentário: Pois é leitor, que bom que a NASA começa publicamente a reconhecer que com a atual tecnologia de propulsão química prevista para o seu Space Launch System (SLS)/Orion seria uma tremenda estupidez enviar astronautas a Marte numa viajem de oito meses. É claro que esse tempo de viajem tem de ser diminuído (eu diária para no máximo dois meses e não quatro), mas é também imperativo que outras tecnologias ainda sejam desenvolvidas para amenizar os efeitos da radiação interplanetária sobre os astronautas, entre tantas outras tecnologias necessárias para que essa viagem seja viável, e com o menor risco possível para os pioneiros humanos que forem escolhidos para esta que pode ser considerada a maior aventura da humanidade até então. A tecnologia de propulsão solar elétrica bem como a de Propulsão Nuclear são opções interessantes, não resta dúvida disso, mas ou uma ou outra, a NASA precisa de foco, precisa se decidir qual dessas propulsões será utilizada para impulsionar a ORION nesta viagem, e assim concentrar todos os esforços em torno do desenvolvimento da propulsão escolhida.

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