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The HM7B was a European cryogenic upper stage rocket engine used on the vehicles in the Ariane rocket family. It was replaced by Vinci, which acts as the new upper stage engine on Ariane 6. Nearly 300 engines have been produced to date.
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engine ariane stage upper vinci rocket engines hm4 chamber pressure specific impulse european references seconds used kn bar also first
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| HM7B | Application | Upper stage engine | 1.00 | infobox |
| HM7B | Chamber | 1 | 1.00 | infobox |
| HM7B | Chamber pressure | 3.7 MPa (37 bar) | 1.00 | infobox |
| HM7B | Country of origin | France | 1.00 | infobox |
| HM7B | Cycle | Gas-generator | 1.00 | infobox |
| HM7B | Designer | Snecma | 1.00 | infobox |
| HM7B | Diameter | 0.992 m (3 ft 3.1 in) | 1.00 | infobox |
| HM7B | Dry mass | 165 kg (364 lb) | 1.00 | infobox |
| HM7B | First flight | 24 December 1979 | 1.00 | infobox |
| HM7B | Length | 2.01 m (6 ft 7 in) | 1.00 | infobox |
| HM7B | Manufacturer | Snecma | 1.00 | infobox |
| HM7B | Mixture ratio | 5:1 | 1.00 | infobox |
| HM7B | Nozzle ratio | 83.1:1 | 1.00 | infobox |
| HM7B | Predecessor | HM4 | 1.00 | infobox |
| HM7B | Propellant | LOX / .mw-parser-output .template-chem2-su{display:inline-block;font-size:80%;line-height:1;vertical-align:-0.35em}.mw-parser-output .template-chem2-su>span{display:block;text-a… | 1.00 | infobox |
| HM7B | Specific impulse, vacuum | 444.6 s (4.36 km/s) | 1.00 | infobox |
| HM7B | Status | Retired | 1.00 | infobox |
| HM7B | Successor | Vinci | 1.00 | infobox |
| HM7B | Thrust, vacuum | 62.2 kN (13,980 lbf) | 1.00 | infobox |
| HM7B | is a | regeneratively cooled gas generator rocket engine fed with liquid oxygen and liquid hydrogen | 0.90 | text |
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