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Hi,
the Japanese Hope-X is unmanned spaceplane.
the Japanese Hope-X is unmanned spaceplane.
hesham said:Hi,
here is also a Japanese Himes mini-shuttle topic;
http://www.secretprojects.co.uk/forum/index.php/topic,7937.0/highlight,japanese+shuttle.html
5 Space Developing Activities in Area of Techniques Common to Transport
Systems
Japan will possess three types of rockets: M-rocket using a solid propellant,
N-system rocket using a petroleum-type fuel and H-system rocket using a
liquid hydrogen fuel. They will be developed as typical machines corresponding
to their respective payloads. No other new types will be developed.
Rather, the plan will stress expanding the applied capacities of the rockets.
The M-rocket will continue to be used in the future for smaller missions,
the N-system rocket will be the main type pending the use of the H-I rocket
and the H-I rocket will be developed and used as the nation's main type for
the period from 1985. Further, the H-II rocket capable of launching an
artificial satellite of about 2 tons into a geostationary orbit will continue
to be developed to meet the demand for launching large artificial satellites
in the 1990's.
blackstar said:Thanks. Those are really neat.
During the early-mid 1990s the Japanese were great at viewgraph engineering. They used to produce these glossy brochures about the HOPE spaceplane that were high-quality paper and very nice to look at. But it was all a lot of baloney--they never had approval to go ahead with any of that stuff.
I know somebody who works with the Japanese on one of their space projects and he's told me some stories about some really nutty concepts floating around within the Japanese space program--things that are just beyond belief. One example was a proposed mission to an asteroid that would require 100+ heavy lift launches on the order of the Ares V. Considering that NASA has a much bigger program than the Japanese, and considering that at most NASA was considering two Ares V launches per year, you can see how totally out of touch with reality such an idea was. And yet this wasn't just some fanboy, this was a guy who worked in the Japanese space program.
chuck4 said:1980-1990 was the period when Japanese economy was forecasted to grow to several time the size of US economy by 2030 and Tokyo was going to be covered in mile high sky pyramidal shaped scrapers that would house a quarter million people each.
LARGE SCALE COMMUNICATIONS SATELLITE PLANNED
OW231033 Tokyo KYODO in English 0938 GMT 23 Mar 87
[Text] Tokyo, March 23 KYODO—A government advisory council on communications
technology Friday submitted to Posts and Telecommunications Minister Shujiro
Karasawa plans for the development of a geostationary platform-style communications
satellite, ministry officials said.
The proposed large-scale space platform, scheduled for completion early next
century, will be equipped with a number of large antennas to relay signals
emitted by a variety of communication media ranging from car telephones to
international data transmission systems, the officials said.
The ministry envisages three of the communications satellites in place over
Japan, Southeast Asia and the South Pacific soon after the year 2000.
The council's plan gave no indication of the projects cost.
The first phase of the satellite development program will involved a number of
preliminary experiments to be conducted aboard a space platform scheduled for
joint development by scientists from Japan, the United States and the European
Community in the mid-1990's, according to the plan.
In step two of the program, a small-scale (3-ton) platform-style satellite
will be used to conduct further practical experiments in the latter half of
the next decade.
The final phase will involve the satellite's structural assembly and the development
of essential components such as relays and antennas.
Larger than satellites previously developed in Japan, the proposed communications
satellite will be assembled in a low 500-kilometer orbit before gradually
being moved out to a stationary orbit of 36,000 kilometers.
/6662
CSO: 4307.021
blackstar said:I'm not sure about the relevancy of the post on the Japanese comsat.
FREE-FLYER'S DEVELOPMENT WORK SHARES SETTLED—The Space Experiment System
Research and Development Organization has decided on development work share
of the 13 companies participating in the preliminary design of the freeflyer
(unmanned space laboratory) which will be launched by Japan's H-II
rocket and recovered by the U.S. Space Shuttle. According to the work share
allotment, Mitsubishi Electric Corp. will integrate the overall systems.
Toshiba Corp. is given the power supply systems. NEC Corp. is in charge of
the telecommunications systems and the solar battery paddles. Fujitsu Ltd.
is responsible for the ground control systems. Nippondenso Co., Ltd. will
deal with space equipment for the first time with a part of the structure of
the free-flyer. The total development cost of the free-flyer is estimated
at about ¥30 billion. It is expected to be launched in 1992. [Text] [Tokyo
AEROSPACE JAPAN-WEEKLY in English 10 Nov 86 pp 6-7] /13046
STA FORMS STUDY GROUP ON SPACE PLANE—With a view to developing a new system
for manned space flights, the Science and Technology Agency (STA) has formed
a "Space Plane Study Group" as an advisory body to the STA's Research
Coordination Bureau Director General. It will study the current status of
the space plane research and development activities both at home and abroad,
an appropriate concept of the space plane for Japan to work on, technical
problems, international cooperation and so on. The study group is expected
to compile its studies into a report in early FY 1987. The conceivable
choices for the Japanese space plane are: 1) an unmanned small-size space
shuttle installed atop the H-II rocket; 2) a manned small-size space shuttle
atop the H-II; and 3) a fully re-usable vehicle like the Orient Express.
[Text] [Tokyo AEROSPACE JAPAN-WEEKLY in English 10 Nov 86 p 7] /13046
blackkite said:Hi! JAXA and Mitsubishi are planning to develop new 3 stage H-3 rocket for planet exploration and manned space flight.
有人船:manned space ship, 探査機:exploration space ship, エンジン:engine, 段目:stage, 全長:overall length, 重量:weight, 静止軌道:stationary orbit, 固体補助ロケット:solid rocket booster, トン:ton, 打ち上げ能力:launching performance, 新設計:new design
June 1, 2013
Jiji Press
The Committee on Space Policy has given the go-ahead for the development of a next-generation rocket succeeding the H-2A.
The development cost of the new rocket, tentatively named H-3, will be included in fiscal budget requests starting in April 2014, with the first launch targeted for fiscal 2020.
The Japan Aerospace Exploration Agency and Mitsubishi Heavy Industries Ltd. have been conducting research and development. Detailed specifications have yet to be discussed.
At a meeting on Thursday, the committee said a fundamental review of the development process and management is needed to maintain international standards over the long term.
The committee said the traditional division of roles between JAXA and the private sector, which handle development and manufacturing, respectively, should be reconsidered. The private sector should play a more active role, it said.
(Jiji Press)
The Office of National Space Policy has decided to develop a new mainline rocket to replace the H2A, with development set to begin next fiscal year and a first launch around 2020.
Eighteen years after work started on the H2A, the government hopes to enter the commercial launch market with the new rocket, in addition to sending up government satellites.
As another goal is to cut costs significantly, private-sector participation in the rocket’s development is a major issue.
Desire for a successor
“We’re aiming for around 2020, when new rockets from overseas are expected to start appearing,” Hiroshi Yamakawa, head of the Space Transport System Section at the office and professor of space engineering at Kyoto University, said after a meeting of his section May 28.
The space policy office is an advisory body to the prime minister that considers and makes proposals on matters such as space policy and budget allocation. It has seven part-time members and is chaired by Yoshiyuki Kasai, chairman of Central Japan Railways Co.
blackkite said:Hi! JAXA and Mitsubishi are planning to develop new 3 stage H-3 rocket for planet exploration and manned space flight.
有人船:manned space ship, 探査機:exploration space ship, エンジン:engine, 段目:stage, 全長:overall length, 重量:weight, 静止軌道:stationary orbit, 固体補助ロケット:solid rocket booster, トン:ton, 打ち上げ能力:launching performance, 新設計:new design
blackkite said:Hi!
全長 : Length, 重量 : weight, メートル : m, トン : ton, 静止軌道への打ち上げ能力 : Launch capability to a geostationary orbit
固体補助ロケット : solid rocket booster(SRB), 新設計したエンジン : new design engine 有人船、探査機 : Manned spaceship、 Probe , 基 : set
RGClark said:Odd. Putting that through Google translator still does not assign any numbers to those values.
Bob Clark
RGClark said:blackkite said:Hi!
全長 : Length, 重量 : weight, メートル : m, トン : ton, 静止軌道への打ち上げ能力 : Launch capability to a geostationary orbit
固体補助ロケット : solid rocket booster(SRB), 新設計したエンジン : new design engine 有人船、探査機 : Manned spaceship、 Probe , 基 : set
Odd. Putting that through Google translator still does not assign any numbers to those values.
blackkite said:Thanks!
H3 Rocket
Length : 50m, Weight : 240-280ton, Launch capability to a geostationary orbit : 4ton(using SRB : 6 ton)
First stage engine : LEX×3, Second stage engine : LEX?
...
FGM's are considered the first of the fusion materials in the material
technology trend ranging from the conventional "separation type" centered
around separate functions, via the "composite type" aiming at the synergism
of dominant property among component elements, up to the "fusion type" in
which the scope reaches the microscopic level whereby even the distinction
between different types of materials is not clear.
Since intended gradient functions can be selected in these materials by
means of multiple changes in the composition and structure in regard to
thickness and a variety of materials can be selected for combination, new
functions totally different from those now common are available. When one
reflects that this type of heterogeneous material was often conventionally
treated as a defective material, it appears that we are living in a quite
different age.
Although opinions are divided on the background of why such a new materials
concept has appeared, it appears that after all it is largely due to the
inception of such huge projects as the future aerospace and energy projects,
the development of materials by computer-aided means, etc.
The future spacecraft regarded as the immediate objective is a gigantic
project in which various advanced nations such as the United States, the EC
nations, and Japan are engaged in a fierce development competition with each
other, with the development target set at the beginning of the 21st century.
The breakthrough in this gigantic project, after all, solely depends upon
whether or not the advanced technologies in regard to materials have reached
the appropriate level at the present stage. For example, the achievement
of the appropriate temperature for each element of the space shuttle based
upon the estimated speed of Mach 8 (eight times the speed of sound) when it
reenters the atmosphere is as shown in Figure 1. The temperature range
reaching the highest level as a result of aerodynamic heating is at the nose
and at the inlet of the propulsion system, where it reaches a temperature
of almost 1,800°C. Moreover, the shuttle is also exposed to a temperature
as low as -253°C when the liquid hydrogen engine is used as the propulsion
system and it becomes an incredible "fireball flying shuttle with a built-in
ultralow- temperature tank."
Among the various materials presently considered as candidates for fuselage
materials for such spacecraft, the use of various inorganic system composite
materials for high-temperature parts is under consideration by the United
States and other countries, and a competition in this, including FGM's, can
be expected in the future. It is evident that the key to the success of a
space shuttle operating in a harsh environment lies in the propulsion
system, and the material's technology, the importance of the material for
this system, is also great. After all, materials have reached the position
of the latest stage high technology. We recently came across an expression
to this effect also in the United States.
Up to now, our discussion has centered on heat-resistant characteristics for
the aerospace field, which is the immediate area of concern. However, the
concept of functionally gradient materials is not limited to such thermal
and mechanical functions. It is believed that gradient materials will be
oriented to multiple functions in the future, and that the range of
application will also be diversified, as indicated in Table 1. Expectations
are especially high in regard to the polymer and biological areas, in which
the practical use impact will be great.
For FGM's to become widely accepted as industrial materials in the society,
taking into account the environment and characteristics required, the issues
and problem points of these materials must be ascertained and appropriate
countermeasures taken.