The newly developed LE-9 engine is the most important factor in achieving cost reduction, improved safety and increased thrust. The expander bleed cycle used in the LE-9 engine is a highly reliable combustion method that Japan has put into practical use for the LE-5A/B engine. However, it is physically difficult for an expander bleed cycle engine to generate large thrust, so the development of the LE-9 engine with a thrust of 1,471 kN (331,000 lbf) is the most challenging and important development element.[6]
Firing tests of the LE-9 first-stage engine began in April 2017.[7]
On 21 January 2022, the launch of the first H3 was rescheduled to FY 2022 or later, citing technical problems regarding the first stage LE-9 engine.[8]
liquid, cryogenic, rocket, engine, burning, liquid, hydrogen, liquid, oxygen, expander, bleed, cycle, three, will, used, power, core, stage, launch, vehicle, country, originjapandesignerjaxamanufacturermitsubishi, heavy, industriesapplicationsustainer, enginea. The LE 9 is a liquid cryogenic rocket engine burning liquid hydrogen and liquid oxygen in an expander bleed cycle Two or three will be used to power the core stage of the H3 launch vehicle 1 2 5 LE 9Country of originJapanDesignerJAXAManufacturerMitsubishi Heavy IndustriesApplicationsustainer engineAssociated LVH3 Launch VehiclePredecessorLE 7AStatusIn DevelopmentLiquid fuel enginePropellantLiquid oxygen Liquid hydrogenMixture ratio5 9CycleExpander Bleed cycleConfigurationChamber1Nozzle ratio37PerformanceThrust vacuum1 471 kN 331 000 lbf Thrust to weight ratio62 50Chamber pressure10 0 MPa 1 450 psi Specific impulse vacuum426 s 4 18 km s DimensionsLength3 8 mDry weight2 4 t 5 300 lb Used inH3 Launch Vehicle core stage ReferencesReferences 1 2 3 4 The newly developed LE 9 engine is the most important factor in achieving cost reduction improved safety and increased thrust The expander bleed cycle used in the LE 9 engine is a highly reliable combustion method that Japan has put into practical use for the LE 5A B engine However it is physically difficult for an expander bleed cycle engine to generate large thrust so the development of the LE 9 engine with a thrust of 1 471 kN 331 000 lbf is the most challenging and important development element 6 Firing tests of the LE 9 first stage engine began in April 2017 7 On 21 January 2022 the launch of the first H3 was rescheduled to FY 2022 or later citing technical problems regarding the first stage LE 9 engine 8 See also EditH3 Launch Vehicle LE 7 LE 5References EditJapanese Wikipedia LE X in Japanese a b Atsumi Masahiro Yoshikawa Kimito Ogawara Akira Onga Tadaoki December 2011 Development of the LE X Engine pdf MHI Technical Review 48 4 36 43 Retrieved 2015 07 08 a b Kumada Nobuhiko Ogawara Akira Manako Hiroyasu Onga Tadaoki Sunakawa Hideo Kurosu Akihide Iizuka Nobuyuki Noda Keiichiro Okita Koichi 2010 07 26 Highly Reliable Design Approaches for Next Booster Engine LE X pdf 46th AIAA ASME SAE ASEE Joint Propulsion Conference amp Exhibit 46 AIAA 2010 6853 Retrieved 2015 07 08 Watanabe Daiki Imai Kazuhiro Ogawara Akira Yamanishi Nobuhiro Neghishi Hideyo Kawatsu Kaname Kurosu Akihide Noda Keiichiro 2011 07 31 Application of High Fidelity Simulation to LE X Engine Development pdf 47th AIAA ASME SAE ASEE Joint Propulsion Conference amp Exhibit 47 AIAA 2011 5930 Retrieved 2015 07 08 Daiki Watanabe Manako Hiroyasu Onga Tadaoki Tamura Takashi Ikeda Kazufumi Isono Mitsunori December 2016 Combustion Stability Improvement of LE 9 Engine for Booster Stage of H3 Launch Vehicle pdf MHI Technical Review 53 4 28 35 Retrieved 2017 06 29 2020年 H3ロケットの目指す姿 2020 H3 projected debut date pdf in Japanese JAXA 2015 07 08 Retrieved 2015 07 08 Shinya Torishima 24 September 2020 H3ロケット開発を襲った 魔物 とは エンジンに見つかった技術的課題 in Japanese Mynavi news Archived from the original on 1 October 2020 LE 9 燃焼試験 in Japanese JAXA Archived from the original on 1 March 2020 Retrieved 21 January 2020 H3ロケットの試験機1号機の打上げについて in Japanese JAXA January 21 2022 Retrieved January 21 2022 External links EditMitsubishi Heavy Industries Ltd Rocket Engines This rocketry article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title LE 9 amp oldid 1110673575, wikipedia, wiki, book, books, library,
