Shulou(Shulou.com)11/24 Report--

CTOnews.com, March 6, 2008: plane 1 of the new main rocket H3, jointly developed by the Japan Aerospace Exploration Agency and Mitsubishi heavy Industries, was tested and launched at the seed Island Universe Center on February 17, but unfortunately it could not lift off as expected, resulting in the failure of the launch mission due to the emergency shutdown of the rocket's first-stage hydrogen and oxygen engine after ignition.

According to the latest news, the H3 rocket was transferred to the launch area again this afternoon and is scheduled to make its maiden flight tomorrow at 09:37 Beijing time, carrying the ALOS-3 optical remote sensing satellite with a launch window of about 6.5 minutes.

According to the investigation, there was a problem with the electrical system supplying power to the H3 core engine, which led to an emergency shutdown after ignition. CTOnews.com will continue to pay attention to whether the maiden flight will be successful tomorrow.

Public data show that the maximum diameter of the H3 carrier rocket is 5.2 meters, the carrying capacity of the sun synchronous orbit is more than 4 tons, and the carrying capacity of the geosynchronous transfer orbit is 7.9 tons. The payload is about 30% larger than that of H2A, but the launch cost is about half of it.

The H3 rocket has a maximum configuration (H3-24L) of 63 meters high and a takeoff mass of 575 tons (excluding payload). It uses a solid booster and a liquid hydrogen and liquid oxygen engine for the first and second stages. The design goal is to increase the carrying capacity and reduce the launch cost relative to the Hmura, and it is the main rocket of Japan in the future.

The LE-9 open expansion cycle liquid hydrogen liquid oxygen engine used this time is a new type of high performance rocket engine developed by Japan. It has a single vacuum thrust of 1471 KN (about 150T) and a vacuum specific impulse of 422s, which is the leading level in the world.

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