As a transport method to space, rocket transport technology is inevitable for the development of space utilization and activities. After 25 years, JAXA, with its original technology, succeeded in creating engines for the H-IIA launch vehicle, the LE-7A for the 1st stage, and the LE-5B for the 2nd stage of space flight. These are world-class liquid propellant rocket engines which use ultracold temperature liquid hydrogen and liquid oxygen. For the long-term project of engine development, on which we have already spent 10 years, before new engines are built/designed, advanced technologies for important components need to be developed. And it is very important to work on improving techniques to face problems found or occurring during the process of development. A lot of work has been devoted to solving the cause of the LE-7A failure, after it was lifted out of the sea, from about 3000m depth. From these lessons, we have focused on the continuous improvement of the safety of rocket engines. Our studies on reliability and performance of major engine parts are endless, even when the engines are already in use. The results of this research have already been reflected in the revision of the LE-7A and LE-5B engines, and the improvements in the reliability and performance have been tested. Upgrading our techniques, we would like to establish the most advanced engine technology in the world for the development of high-performance engines for the next generation key launch vehicles after the H-IIA, and for reusable transporters between the ground and the space, and also reusable engines for orbital transporters between the Earth and other planets. * The above image is from the research and development of the latest turbo pump. MORE >>