The LE-5 liquid rocket engine and its derivative models were developed in Japan to meet the need for an upper stage propulsion system for the H-I and H-II series of launch vehicles. It is a bipropellant design, using LH2 and LOX. Primary design and production work was carried out by Mitsubishi Heavy Industries. In terms of liquid rockets, it is a fairly small engine, both in size and thrust output, being in the 89 kN (20,000 lbf) and the more recent models the 130 kN (30,000 lbf) thrust class. The motor is capable of multiple restarts, due to a spark ignition system as opposed to the single use pyrotechnic or hypergolic igniters commonly used on some contemporary engines. Though rated for up to 16 starts and 40+ minutes of firing time, on the H-II the engine is considered expendable, being

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  • Le LE-5 est un moteur-fusée à ergols liquides japonais brûlant le mélange cryogénique hydrogène/oxygène développé pour propulser l'étage supérieur du lanceur H-I. Ce petit moteur, le premier utilisant l'hydrogène liquide développé par le Japon, a existé dans différentes versions d'une poussée comprise entre 89 kN et 130 kN. Toutes les versions peuvent être redémarrées plusieurs fois en vol. Il a effectué son premier vol le 12 août 1986 sur une fusée H-I et a été adapté par la suite pour propulser l'étage supérieur des lanceurs H-II, H-IIA et H-IIB. (fr)
  • LE-5は宇宙開発事業団(NASDA、現宇宙航空研究開発機構JAXA)が航空宇宙技術研究所(NAL)や三菱重工業(MHI)、石川島播磨重工業(現IHI)と共に開発したロケットエンジンである。 (ja)
  • LE-5火箭发动机及其派生型号都是日本设计制造的用于H1和H2火箭上面级推进的。是以液氢液氧为推进剂。最初由三菱重工设计制造。发动机尺寸和推力都很小。发动机采用火花点火因而能多次启动,能最多点火16次,工作40余分钟。而用于H2火箭通常是点火一次工作9分钟后抛弃。而发射地球静止轨道任务,则在火箭成功停泊低地球轨道后发动机二次点火将酬载送到静止轨道。 (zh)
  • LE-5 – japoński silnik rakietowy na paliwo kriogeniczne, produkowany przez Mitsubishi na potrzeby górnego stopnia rakiet H-I. Silnik ten jest zdolny do ponownego startu głównie dzięki zapłonnikom iskrowym. Konstrukcja LE-5 jest podstawą dla kolejnych modeli silnika używanych w rakietach H-II, H-IIA oraz H-IIB. (pl)
  • The LE-5 liquid rocket engine and its derivative models were developed in Japan to meet the need for an upper stage propulsion system for the H-I and H-II series of launch vehicles. It is a bipropellant design, using LH2 and LOX. Primary design and production work was carried out by Mitsubishi Heavy Industries. In terms of liquid rockets, it is a fairly small engine, both in size and thrust output, being in the 89 kN (20,000 lbf) and the more recent models the 130 kN (30,000 lbf) thrust class. The motor is capable of multiple restarts, due to a spark ignition system as opposed to the single use pyrotechnic or hypergolic igniters commonly used on some contemporary engines. Though rated for up to 16 starts and 40+ minutes of firing time, on the H-II the engine is considered expendable, being used for one flight and jettisoned. It is sometimes started only once for a nine-minute burn, but in missions to GTO the engine is often fired a second time to inject the payload into the higher orbit after a temporary low Earth orbit has been established. The original LE-5 was built as a second stage engine for the H-I launch vehicle. It used a fairly conventional gas generator cycle. (en)
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  • Le LE-5 est un moteur-fusée à ergols liquides japonais brûlant le mélange cryogénique hydrogène/oxygène développé pour propulser l'étage supérieur du lanceur H-I. Ce petit moteur, le premier utilisant l'hydrogène liquide développé par le Japon, a existé dans différentes versions d'une poussée comprise entre 89 kN et 130 kN. Toutes les versions peuvent être redémarrées plusieurs fois en vol. Il a effectué son premier vol le 12 août 1986 sur une fusée H-I et a été adapté par la suite pour propulser l'étage supérieur des lanceurs H-II, H-IIA et H-IIB. (fr)
  • LE-5は宇宙開発事業団(NASDA、現宇宙航空研究開発機構JAXA)が航空宇宙技術研究所(NAL)や三菱重工業(MHI)、石川島播磨重工業(現IHI)と共に開発したロケットエンジンである。 (ja)
  • LE-5火箭发动机及其派生型号都是日本设计制造的用于H1和H2火箭上面级推进的。是以液氢液氧为推进剂。最初由三菱重工设计制造。发动机尺寸和推力都很小。发动机采用火花点火因而能多次启动,能最多点火16次,工作40余分钟。而用于H2火箭通常是点火一次工作9分钟后抛弃。而发射地球静止轨道任务,则在火箭成功停泊低地球轨道后发动机二次点火将酬载送到静止轨道。 (zh)
  • LE-5 – japoński silnik rakietowy na paliwo kriogeniczne, produkowany przez Mitsubishi na potrzeby górnego stopnia rakiet H-I. Silnik ten jest zdolny do ponownego startu głównie dzięki zapłonnikom iskrowym. Konstrukcja LE-5 jest podstawą dla kolejnych modeli silnika używanych w rakietach H-II, H-IIA oraz H-IIB. (pl)
  • The LE-5 liquid rocket engine and its derivative models were developed in Japan to meet the need for an upper stage propulsion system for the H-I and H-II series of launch vehicles. It is a bipropellant design, using LH2 and LOX. Primary design and production work was carried out by Mitsubishi Heavy Industries. In terms of liquid rockets, it is a fairly small engine, both in size and thrust output, being in the 89 kN (20,000 lbf) and the more recent models the 130 kN (30,000 lbf) thrust class. The motor is capable of multiple restarts, due to a spark ignition system as opposed to the single use pyrotechnic or hypergolic igniters commonly used on some contemporary engines. Though rated for up to 16 starts and 40+ minutes of firing time, on the H-II the engine is considered expendable, being (en)
rdfs:label
  • LE-5 (fr)
  • LE-5 (ja)
  • LE-5 (en)
  • LE-5 (pl)
  • LE-5火箭发动机 (zh)
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