Talk:H-IIA

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Use of Foreign Technology[edit]

Why is there no mention of H2A's use of Delta technology? H2 was entirely indigenous, but following it's failures and high costs, the decision was made to use foreign technology again with the H2A (as they had done with the H1). This is an important piece of information pertaining to the efficiency and overall low cost of the launch vehicle. [1] [2] [3] Tablecat (talk) 04:27, 20 May 2009 (UTC)[reply]

I write with a translation machine. The use of Delta technology has ended with H-I. The price decreased compared with H-II because the design of the main body, the engine, and equipment is greatly changed. It is an exaggerated evaluation that makes it a big cause to decrease the price though parts of the foreign country are certainly used for a part of the composition. The entire design, LE-7A, LE-5B, SRB-A, the controller, and equipment use the technology of Japan. It is a common misperception that SRB-A is made of the foreign country. The license of ATK was only used in the motor case molding process of a part of SRB-A. SRB-A is the one that was designed and manufactured from IHI AEROSPACE. SRB-A uses the core technology of JAXA, IHI AEROSPACE, NOF CORPORATION and Toray Industries. --60.42.108.2 (talk) 15:37, 11 January 2011 (UTC)[reply]

Launch failure[edit]

Why TF1 is marked as a "failure"? There might be subtle problems, but the launch was quite successful.[[4]]

Also it is misleading to say that TF2 was a "failure". The launch itself was successful, though it failed to separate a satellite; however, the problem was due to the satellite, not the launch vehicle. It would be appropriate to say "partial failure".

Hiro, 25 April 2008

Picture[edit]

The drawing of the rocket is not the H-IIA, but the H-IIB, which is currently being developed by JAXA as a new rocket. —Preceding unsigned comment added by 210.251.7.80 (talk) 13:26, 11 September 2007 (UTC)[reply]

I wonder what made you think so. The letters "H-IIA" are clearly visible on the 2nd stage, and the image comes from an ADEOS press kit (launched by H-IIA), as can be seen on the image description page. --朝彦 (Asahiko) 17:15, 11 September 2007 (UTC)[reply]

Talk[edit]

This should probably be merged with H-2A rocket. - NeuronExMachina 08:01, 19 Aug 2004 (UTC)

Yea, or it could be murged with this page, but they would be better of together... - Golf 14:57, 1 Sep 2004 (UTC)
Done. -Joseph (Talk) 02:09, 2004 Oct 22 (UTC)

Launch provider?[edit]

Will Mitsubishi be the "launch service provider" for this rocket? Or is JAXA responsible for the launch operations? (sdsds - talk) 01:10, 8 September 2007 (UTC)[reply]

Mitsubishi Heavy Industries will provide the launch services for H-IIA starting from F13. I don't have an English source at hand right away, but this PDF (in Japanese) basically says it all.[5] Basically, the jobs left for JAXA are observing security and deciding go/no-go from security-point-of-view. JAXA is still regarded de jure responsible internationally because of international treaties. --朝彦 (Asahiko) 16:25, 8 September 2007 (UTC)[reply]

H-II series[edit]

There should be an H-II series article about the program and related rockets. 70.55.89.134 (talk) 07:42, 12 April 2008 (UTC)[reply]

Liquid fueled?[edit]

The side panel describes solid fuel for the first stage. —Preceding unsigned comment added by 131.252.209.128 (talk) 15:57, 29 November 2008 (UTC)[reply]

  • No it doesn't. It lists the first stage fuel as "LOX/LH2", which is liquid. --GW_SimulationsUser Page | Talk 16:40, 29 November 2008 (UTC)[reply]

2022 and 2024[edit]

When H-IIA was privatized, MHI decided to disuse 2022 and 2024 and to close SSB line (a news source in Japanese at this time - 三菱重工、「Ｈ２Ａ」２機種に半減・民営化でコスト減　NIKKEI NET：企業 ニュース at the Wayback Machine (archive index)). In fact, MHI have not been ordered the SSB-used configurations such as 2022 and 2024 after privatization anew. Although F13 and F14 was launched after privatization, they should be ordered before privatization. There are no reasons to revive the SSB after developing 204, which is more simple and efficient than 2024. It seems that the fade-out of SSB has completed and 2022 and 2024 will never fly again.--Gwano (talk) 05:15, 12 September 2010 (UTC)[reply]

I'd prefer to have something definite that mentions this from MHI instead of a news source (do the Japanese make press releases like the US does) that explicitly says that 2022 and 2024 will not fly again instead of just referring to them as older less-capable models of the rocket. The other issue is that the SSB production line was not a purely-Japanese line, they are American Castor 4s, which were also used on the Delta II 6000 series. There are five "white tail" 7000 series Delta IIs which use the GEM 40, so the capability may still exist with a slightly improved SSB. We need more explicit references to be official although I have no doubt of the voracity of these facts. -MBK004 02:20, 13 September 2010 (UTC)[reply]
The white tail Deltas are all heavies, which use GEM-46 motors. Either way, a variant with GEM-derived SSBs would still be a new configuration. --GW… 13:29, 13 September 2010 (UTC)[reply]

Does the first digit in the configuration code mean the number of stages?[edit]

Because there's the H-IIB 304, but it only has 2 stages. — Preceding unsigned comment added by 98.255.214.133 (talk) 02:12, 26 December 2012 (UTC)[reply]

Why is there a US Flag next to the ASTRO-H satellite?[edit]

Should there be a US flag next to the ASTRO-H satellite? From the ASTRO-H wiki page it appears to have been commissioned by the Japan Aerospace Exploration Agency (JAXA). "Hitomi has been built by an international collaboration led by JAXA with over 70 contributing institutions in Japan, the US, Canada, and Europe." — Preceding unsigned comment added by Aussiejohn (talk • contribs) 19:31, 17 February 2016 (UTC)[reply]

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H-IIA[edit]

H-IIA (H-2A) is an active expendable launch system operated by Mitsubishi Heavy Industries (MHI) for the Japan Aerospace Exploration Agency. The liquid-fueled H-IIA rockets have been used to launch satellites into geostationary orbit, to launch a lunar orbiting spacecraft. Launches occur at the Tanegashima Space Center. — Preceding unsigned comment added by 2001:8F8:1333:8623:95D0:20C3:ACA9:C481 (talk) 10:23, 21 June 2020 (UTC)[reply]

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