HTV

[avmich]

Сопло диаметром 30 мм и менее - на нем чистый восстановительный или окислительный пристенок организовать в принципе невозможно.

Можно узнать, почему?

[ronatu]

япония целится в пилотируемый космос...


http://mdn.mainichi.jp/mdnnews/news/20100814p2a00m0na018000c.html

The three plans for the HTV-R are: equipping the HTV with a capsule measuring dozens of centimeters in diameter; equipping the HTV with a capsule similar to the Russian Soyuz spacecraft's return capsule measuring 2.6 meters in diameter; and remodeling the HTV's cargo space into a large capsule measuring 4 meters in diameter and 3.8 meters high.

Of these plans, JAXA is focusing mainly on plans two and three that can be converted into manned spacecraft. The space agency intends to make a final decision by the end of the current fiscal year and launch the first HTV-R sometime between 2016 and 2018.

[mescalito]

Сопло диаметром 30 мм и менее - на нем чистый восстановительный или окислительный пристенок организовать в принципе невозможно.

Можно узнать, почему?

Если по простому - потому что в импульсном режиме внутри камеры ХАОС  

[Гуманоид]

япония целится в пилотируемый космос...


http://mdn.mainichi.jp/mdnnews/news/20100814p2a00m0na018000c.html

HTV лучший агрегат чтобы никогда не быть "converted into manned spacecraft". О чем свидетельствует рисунок JAXA
А это что означает? нанокапсула?

The three plans for the HTV-R are: equipping the HTV with a capsule measuring dozens of centimeters in diameter...

[Старый]

япония целится в пилотируемый космос...


http://mdn.mainichi.jp/mdnnews/news/20100814p2a00m0na018000c.html

HTV лучший агрегат чтобы никогда не быть "converted into manned spacecraft". О чем свидетельствует рисунок JAXA
А это что означает? нанокапсула?

Очевидно доставка на МКС запасного гиродина?

[Agent]

HTV лучший агрегат чтобы никогда не быть "converted into manned spacecraft". О чем свидетельствует рисунок JAXA

HTV довольно грамотно спроектирован.

[Гуманоид]

Мне больше понравился предыдущий рисунок  :roll:

[Salo]

http://www.spaceflightnow.com/news/n1008/27cargoreturn/

The Japan Aerospace Exploration Agency is refining concepts for a recoverable HTV that could be launched as soon as 2016.

In a presentation to the Japanese government's Space Activities Commission earlier this month, officials outlined three designs for the HTV-R spacecraft.

Japan has studied the development of a modest capsule to return a small cache of cargo to Earth. But officials favor more ambitious concepts of larger re-entry vehicles with broad applications.

One alternative is based on a 8.5-foot-diameter capsule to demonstrate a more substantial return capacity of more than 600 pounds. Engineers have also sketched a 13.1-foot-wide, 12.5-foot-tall cone-shaped craft that could transport more than 3,500 pounds back to Earth, plus it is better equipped to eventually carry astronauts.

JAXA says it need to start more advanced development of the HTV-R system in 2011 to launch the first spacecraft in the mid-2010s.

[Дмитрий В.]

http://www.spaceflightnow.com/news/n1008/27cargoreturn/

Еще чуть-чуть и из него получится ТКС :roll:

[Salo]

http://forum.nasaspaceflight.com/index.php?topic=20286.msg627297#msg627297

Fuji пишет:

Latest official study report (Japanese) was released today.

Option 0 Small capsule
Option 1 2.6m x 1.5m 2,000kg capsule (Return 300kg)
Option 2 4.0m x 3.8m 5,700kg capsule (Return 1,600kg)

Trade off study will be held about half year from now.


Option 0


Option 1


Option 2

[Salo]

http://spaceref.ca/missions-and-programs/canadian-space-agency/dextre/meet-canadas-special-purpose-dexterous-manipulator-or-dextre-for-short.html

Japanese Rendezvous

Once Dextre is able to pull its weight on the station, the CSA is looking ahead to the first major maneuver involving Canadarm2, the mobile base the arm rests on, and Dextre.
Slated for January 2011, the Japanese HTV-2 cargo spacecraft will make a supply run to ISS. Once it arrives, a robotic ballet dance will ensure between the Canadian instruments.

Canadarm2 will first snag HTV-2 and take out a hardware rack - called the Exposed Pallet - to hand over to a Japanese robotic arm aboard ISS on the Kibo module. Next, the arm will be moved over to its mobile base to move Dextre to the pallet. Dextre will take out two payloads from the rack, then hitch a ride on Canadarm2 to the opposite side of the station to install them.

When the installation is complete, Canadarm2 will drop Dextre off in the middle of the station and move back towards the Kibo module, where it will pick up the empty rack and stow it on HTV-2.

Around 40 days after HTV-2 arrives at the station, Canadarm2 will release it. Both the Japanese spacecraft and the rack will take a controlled plunge into Earth's atmosphere, burning up upon re-entry.

As for what the robot will do next, a lot of that will have to be determined on the fly. "With Dextre and the maintenance of the space station, we don't really know what the next problem is going to be," said Ken Podwalski, manager of Dextre's mission operations, in another CSA video interview.

"So it requires us to be ready at a much larger level, a much broader scope of readiness, and I think that's going to be a very unique challenge for anybody that's participated in this program. As much as engineers would look at a problem and want to know how they have to be prepared, we don't have that luxury."

[instml]

Independent human spaceflight sought by Japan

The Japanese space agency is pushing for a domestic human spaceflight capability, proposing modifications to the country's International Space Station cargo delivery system to carry astronauts into orbit by 2025.

If approved by the Japanese government, the craft's development would follow a crawl-walk-run approach. Japan has already demonstrated its H-2 Transfer Vehicle can haul cargo and experiments to the space station, and next up could be developing a return capsule to bring equipment from the outpost back to Earth.

The Japan Aerospace Exploration Agency plans to fly seven HTVs in support of the space station through 2016. Two Japanese cargo freighters successfully flew in 2009 and 2011, and five more are due to launch at a rate of one per year.

JAXA's leadership is openly pitching the HTV as the foundation of a manned spacecraft, which could fly Japanese crews as soon as 2025. But the idea requires approval by Japanese lawmakers and the endorsement of the government agency in charge of JAXA.

Japanese spending priorities have shifted in the wake of the costly Tohoku earthquake and tsunami in March 2011, straining JAXA's budget in the process.

Keiji Tachikawa, president of JAXA, said developing a recoverable capsule for the HTV would be the next technological leap needed to make a Japanese manned spaceship a reality.

"If we can make the HTV retrievable, then we expect that we will be able to turn it into a manned spacecraft, too," Tachikawa said in an interview posted on JAXA's website. "However, the decision on whether or not Japan goes ahead with this rests with the Japanese government. So before we move in that direction, the government has to give us the go-ahead."

Japan is targeting fiscal year 2017, which ends in March 2018 in Japan, for the first flight of the HTV-R craft, which will bring back up to 3,500 pounds of cargo in a pressurized capsule on each mission.


 
The HTV flights help cover Japan's share of the space station's operating costs. Instead of making financial payments to NASA, the station's program integrator, JAXA and the European Space Agency barter to meet their commitments by providing transportation services with the HTV and Europe's Automated Transfer Vehicle.

With the space station's life extension until at least 2020, the program's partners will owe more operating costs, and Japan plans to continue the HTV delivery service, but with the capability to return hardware to Earth.

JAXA has not disclosed the total cost of designing and building the HTV-R spacecraft.

The HTV now disposes of the station's garbage after leaving the outpost, plunging to a controlled fiery crash over the Pacific Ocean.

JAXA foresees a capsule-shaped lifting body for the HTV-R's return craft, enabling precision landing zones for the vehicle to parachute into the ocean.

If Japan proceeds with a crewed spaceship, engineers would need to human-rate the country's H-2B rocket or develop a new launcher. Officials are already investigating safety upgrades to the H-2B's hydrogen-fueled LE-7A engine, and a manned rocket will require an escape system yet to be developed.

"Personally, I think that if we continue to cooperate with the international community in space, our partners will ask Japan, a country with a highly developed space program, to help build an infrastructure for manned space transport," Tachikawa said. "This is another reason why I believe that we should develop a made-in-Japan manned spacecraft.

Europe and NASA are considering an ESA-supplied service module for the U.S. Orion Multi-Purpose Crew Vehicle to cover the agency's share of space station costs.

ESA's proposal for a retrievable cargo ship, called the ARV, did not gain enough support among European member states or NASA, leaving the space agency searching for a new barter element.

http://www.spaceflightnow.com/news/n1202/09jaxa/

[instml]

HTV-4  :?:   :?:   :?:

 Литва планирует обзавестись собственным спутником в 2013 году
                
 Литва планирует стать первой из стран Балтии, которая запустит в космос свой спутник, сообщает Бизнес-ТАСС.
 
 "Намечено, что историческое для страны событие произойдет летом 2013 года", - заявил в эфире национального телевидения представитель компании "Инновационные инженерные проекты" Лауринас Мачюлис (Laurynas Maсiulis).
 
 "Наш спутник будет представлять собой заполненный электроникой куб объемом 10 куб. см. Литовские ученые хотят опробовать в космосе кремневые солнечные батареи, средства космической навигации и межспутниковой связи, сделать снимки Земли", - сказал Лауринас Мачюлис.
 
 "Вес прибора не должен превышать 1, 330 кг. Это связано с расценками выведения на орбиту, которые составляют основную часть стоимости нашего космического проекта. За 1 кг. массы, запущенной в космос, в среднем приходится платить около 50 тысяч долларов", - отметил он.
 
 По словам представителя компании, литовский спутник намечено вывести на космическую орбиту с помощью японского носителя. "Наше изделие будет доставлено на международную космическую станцию и с помощью механической руки выведено на орбиту", - уточнил детали проекта г-н Мачюлис.
 
 На высоте 400 км. над Землей спутник проработает около полугода. Его в память о самолете, на котором в 1933 году литовские летчики совершили перелет через Атлантику, назовут "Литуаника-1" (Lituanica-1), сообщает Aviation EXplorer.
 
 К.И.

http://novosti-kosmonavtiki.ru/news/3240/

[frigate]

Не нашел тему про пилотируемый японский КК на базе HTV     
Proposal platform investigation technology for exploration is provided near the ISS(LEO) Japan Manned Space Systems Corp. Tatsuhiro NOZUE 
on Galaxy Forum China 2013 – Beijing Sunday 22 September 2013 @ China National Convention Center. 
Link 
Вкратце - миссия в точку Лагранжа Л2 со стыковкой с ЛОС. Приведены ХС для 3 маневров по трассе перелета ЛЕО-ЕМЛ2:







2014 IAA SPACE EXPLORATION CONFERENCE
Feasibility Study on the Missions to Earth-Moon Lagrange-Point 2 and the Moon using the HTV based Spacecraft
Tatsuhiro Nozue, Yoshihiko Uemura, Keiichi Miyamoto, Shin-ichi Amatatsu - Japan Manned
Space Systems (JAMSS), Japan.