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HM7B

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and resulting in a nominal burn time increase from 570 to 735 seconds. Qualification tests were completed in 1983 and this upgraded variant was designated HM7B. It was also used on the Ariane 4 vehicle's upper stage where the burn time was further increased to 780 seconds, and since 12 February 2005
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it became necessary to improve the performance of the upper stage engine. This was achieved by extending the nozzle length and increasing the chamber pressure from 30 to 35 
411:. It has no restart capability: the engine is continuously fired for 950 seconds in its Ariane 5 version (780 s in the Ariane 4). It provides 62.7 kN of thrust with a 2830: 2563: 519: 1810: 2442: 628: 2230: 2225: 2220: 2215: 2210: 1805: 2556: 659: 578: 434: 1925: 429: 2835: 2549: 2529: 2008: 2517: 1324: 551: 2825: 2777: 1800: 1795: 1790: 1414: 523: 397: 621: 2489: 1945: 1279: 998: 960: 2792: 2341: 1340: 669: 493:"Simple mass and size estimation relationships of pump fed rocket engines for launch vehicle conceptual design" 115: 606: 2800: 2782: 2713: 2688: 2672: 2572: 2386: 2354: 2205: 2184: 1681: 907: 900: 760: 614: 2751: 2723: 2718: 2652: 2458: 2174: 2017: 1765: 1634: 1404: 1394: 1085: 1067: 332: 2667: 2410: 2179: 1955: 1950: 1900: 1820: 1780: 1775: 1770: 1644: 1419: 1369: 1307: 755: 461: 424: 360: 336: 319: 100: 339:, which acts as the new upper stage engine on Ariane 6. Nearly 300 engines have been produced to date. 2769: 2001: 1920: 1915: 1910: 1905: 1895: 1329: 641: 2473: 2313: 2308: 2303: 2298: 2293: 2288: 2283: 2278: 2273: 2268: 2263: 2258: 2253: 2248: 2189: 2119: 1930: 1750: 1450: 1320: 1005: 645: 400: 152: 2636: 2598: 1745: 585: 2705: 1825: 1875: 1855: 974: 967: 412: 380: 215: 37: 2741: 2593: 2494: 1994: 1274: 692: 408: 2346: 2759: 2361: 1249: 1229: 1224: 1219: 843: 680: 648: 2819: 1254: 1038: 954: 880: 699: 637: 492: 404: 328: 193: 189: 2468: 555: 2104: 2541: 2366: 2588: 2394: 2336: 2054: 1344: 1311: 1244: 1239: 1234: 325: 2631: 2626: 2621: 2603: 376: 1379: 322: 355:
rocket engine. It was designed to power a third stage of newly constructed
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of 444.6 s. The engine's chamber pressure is 3.5 MPa.
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satellite on the orbit. With the later introduction of
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It was replaced by 333:Ariane rocket family 2120:Guiana Space Centre 1466:RD-0216, 0217, 0235 1129:RD-0107, 0108, 0110 491:B.T.C. Zandbergen. 347:The development of 32: 2646:Spacecraft engines 446:Comparable engines 116:Liquid-fuel engine 82:Upper stage engine 2813: 2812: 2809: 2808: 2706:CFM International 2698:Joint development 2539: 2538: 2503: 2502: 2424: 2423: 2099: 2098: 1984: 1983: 1926:Space Shuttle SRB 1667: 1666: 1605: 1604: 1295: 1294: 1017: 1016: 591:on 12 August 2014 312: 311: 45:Country of origin 16:(Redirected from 2848: 2702: 2566: 2559: 2552: 2543: 2527: 2526: 2515: 2514: 2433: 2351: 2327: 2206:List of launches 2128: 2107: 2029: 2011: 2004: 1997: 1988: 1675: 1674: 1511:RD-263, 268, 273 1442:along other LREs 1304: 1164:RD-191, 151, 181 1028: 686: 677: 631: 624: 617: 608: 601: 600: 598: 596: 590: 584:. Archived from 583: 574: 568: 567: 565: 563: 554:. Archived from 547: 536: 535: 533: 531: 522:. Archived from 515: 504: 503: 501: 499: 488: 413:specific impulse 381:specific impulse 216:Specific impulse 136: 56:24 December 1979 40: 33: 21: 2856: 2855: 2851: 2850: 2849: 2847: 2846: 2845: 2816: 2815: 2814: 2805: 2787: 2764: 2746: 2728: 2693: 2677: 2641: 2608: 2575: 2570: 2540: 2535: 2499: 2478: 2447: 2420: 2399: 2387:Launch provider 2381: 2349: 2318: 2237: 2194: 2153: 2122: 2108: 2095: 2059: 2043: 2020: 2015: 1985: 1980: 1962: 1683: 1676: 1672: 1663: 1601: 1491:RD-0255 to 0257 1486:RD-0243 to 0245 1348: 1337: 1333: 1327: 1315: 1291: 1032: 1023: 1013: 877: 871: 865: 696: 690: 671: 664: 651: 649:launch vehicles 635: 605: 604: 594: 592: 588: 581: 576: 575: 571: 561: 559: 552:"HM7B - Snecma" 549: 548: 539: 529: 527: 517: 516: 507: 497: 495: 490: 489: 480: 475: 448: 421: 409:liquid hydrogen 394: 345: 296: 197: 134: 129: 28: 23: 22: 15: 12: 11: 5: 2854: 2852: 2844: 2843: 2838: 2833: 2828: 2818: 2817: 2811: 2810: 2807: 2806: 2804: 2803: 2797: 2795: 2789: 2788: 2786: 2785: 2780: 2774: 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States 824: 823: 822: 815: 810: 802: 801: 800: 793: 788: 780: 779: 778: 773: 765: 764: 763: 758: 753: 745: 744: 743: 736: 729: 724: 719: 714: 705: 703: 694: 683: 674: 666: 665: 663: 662: 656: 653: 652: 638:Rocket engines 636: 634: 633: 626: 619: 611: 603: 602: 569: 537: 505: 477: 476: 474: 471: 470: 469: 464: 459: 454: 447: 444: 443: 442: 437: 432: 427: 420: 417: 396:The HM7B is a 393: 390: 344: 341: 310: 309: 307: 303: 302: 298: 297: 295: 294: 285: 280: 275: 270: 260: 257: 256: 252: 251: 248: 244: 243: 240: 236: 235: 232: 228: 227: 223: 222: 219: 212: 211: 208: 201: 200: 195: 186: 185:Thrust, vacuum 182: 181: 177: 176: 173: 169: 168: 165: 161: 160: 156: 155: 150: 146: 145: 142: 138: 137: 123: 119: 118: 112: 111: 108: 104: 103: 98: 94: 93: 88: 84: 83: 80: 76: 75: 72: 68: 67: 62: 58: 57: 54: 50: 49: 46: 42: 41: 26: 24: 14: 13: 10: 9: 6: 4: 3: 2: 2853: 2842: 2839: 2837: 2834: 2832: 2829: 2827: 2824: 2823: 2821: 2802: 2799: 2798: 2796: 2794: 2790: 2784: 2781: 2779: 2776: 2775: 2773: 2771: 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Retrieved 586:the original 572: 560:. Retrieved 556:the original 550:Snecma S.A. 528:. Retrieved 524:the original 496:. Retrieved 395: 348: 346: 315: 313: 287: 263: 172:Nozzle ratio 71:Manufacturer 53:First flight 2778:Olympus 593 2770:Rolls-Royce 2637:Silvercrest 2599:Atar Volant 2464:Ariane 5 ME 2395:Arianespace 2337:ArianeGroup 2055:Ariane Next 1973:Engines in 1620:RD-109, 119 1558:RD-864, 869 1543:RD-854, 861 1506:RD-253, 275 1154:RD-170, 171 326:upper stage 180:Performance 87:Predecessor 79:Application 2820:Categories 2689:Coléoptère 2530:Multimedia 1360:YF-1, 2, 3 1308:Hypergolic 1280:Rutherford 999:Prometheus 961:Archimedes 473:References 306:References 301:References 226:Dimensions 188:62.2  122:Propellant 2614:Turbofans 2581:Turbojets 2452:Cancelled 2436:Proposals 2231:2020–2029 2226:2010–2019 2221:2000–2009 2216:1990–1999 2211:1979–1989 1901:Castor 30 1781:Zefiro 40 1776:Zefiro 23 1717:SpaB-140C 1114:NK-33, 44 1024:cryogenic 870:Methalox 689:Hydrolox 681:Cryogenic 595:10 August 562:10 August 530:10 August 498:14 August 323:cryogenic 97:Successor 2760:TP400-D6 2734:PowerJet 2663:PPS-1350 2594:Atar 101 2518:Category 2350:(merged) 2199:Launches 2091:Ariane 5 2086:Ariane 4 2081:Ariane 3 2076:Ariane 2 2071:Ariane 1 2039:Ariane 6 1916:Orbus-21 1771:Zefiro 9 1534:Ukraine 1312:Aerozine 1300:Storable 1192:Ukraine 1134:RD-0110R 1031:Kerolox 419:See also 392:Overview 386:Ariane 5 373:Ariane 3 369:Ariane 2 357:Ariane 1 320:European 292:Ariane 1 283:Ariane 2 278:Ariane 3 273:Ariane 4 267:Ariane 5 247:Dry mass 239:Diameter 218:, vacuum 206:pressure 204:Chamber 61:Designer 2673:Vulcain 2483:Retired 2459:Adeline 2429:Related 2404:Related 2242:Flights 2185:Vulcain 2158:Engines 2064:Retired 2032:Current 2025:Rockets 1975:italics 1936:Star 48 1931:Star 37 1911:Orbus-6 1832:Israel 1766:Waxwing 1722:Europe 1714:SpaB-65 1616:Russia 1481:RD-0237 1476:RD-0236 1447:Russia 1426:Israel 1386:Europe 1230:Kestrel 1176:S1.5400 1139:RD-0124 1105:Russia 1098:SCE-200 994:Europe 987:RD-0169 982:Russia 908:Longyun 901:Lingyun 819:RD-0146 813:RD-0120 804:Russia 761:Vulcain 747:Europe 670:Liquid 646:orbital 343:History 255:Used in 164:Chamber 110:Retired 2801:Larzac 2793:Safran 2742:SaM146 2653:Viking 2495:Europa 2474:Hermes 2175:Viking 2165:Aestus 2125:Kourou 1891:AJ-60A 1856:KM-V2b 1847:Japan 1821:Salman 1787:India 1761:Topaze 1726:Mage 1 1691:China 1682:Solid 1589:TR-201 1553:RD-856 1548:RD-855 1538:RD-843 1528:S5.98M 1517:RD-270 1411:India 1405:Viking 1395:Astris 1390:Aestus 1380:YF-50D 1356:China 1265:RS-27A 1255:Merlin 1245:LR-105 1209:RD-810 1202:RD-801 1186:TEPREL 1182:Spain 1170:RD-193 1159:RD-180 1149:RD-120 1093:India 1086:Welkin 1079:YF-130 1073:YF-115 1068:YF-102 1063:YF-100 1047:China 975:Aeon R 968:Aeon 1 955:Raptor 939:YF-215 932:YF-209 925:TQ-15A 889:China 782:Japan 771:CE-7.5 767:India 722:YF-75D 708:China 467:CE-7.5 318:was a 288:HM7(A) 231:Length 175:83.1:1 107:Status 74:Snecma 65:Snecma 48:France 2714:CFM56 2668:Vinci 2469:DC4EU 2443:SUSIE 2377:Nammo 2372:SABCA 2314:VA262 2309:VA256 2304:VA255 2299:VA254 2294:VA253 2289:VA248 2284:VA247 2279:VA246 2274:VA245 2269:VA243 2264:VA244 2259:VA242 2254:VA241 2249:VA240 2180:Vinci 2147:ELA-4 2142:ELA-3 2137:ELA-2 2132:ELA-1 1956:X-254 1951:X-248 1941:UA120 1921:Orion 1896:Algol 1881:SRB-A 1876:M-34c 1851:KM-V1 1841:RSA-3 1817:Iran 1710:FG-47 1705:FG-46 1700:FG-36 1695:FG-02 1656:XLR81 1650:RS-88 1645:Curie 1635:Gamma 1610:Other 1594:XLR81 1583:RS-88 1578:LR-91 1573:LR-87 1523:S5.92 1451:17D61 1420:Vikas 1400:Vexin 1375:YF-40 1370:YF-23 1343:, or 1323:, or 1317:UH 25 1285:XLR50 1270:RS-56 1260:RS-27 1240:LR-89 1235:LR-79 1119:RD-58 1109:NK-15 1057:TH-12 1051:TH-11 1022:Semi- 919:TQ-12 914:TQ-11 894:BF-20 859:RS-68 854:RS-25 831:BE-3U 776:CE-20 756:Vinci 740:YF-90 733:YF-79 727:YF-77 717:YF-75 712:YF-73 589:(PDF) 582:(PDF) 462:Vinci 457:RL-10 452:YF-75 388:ECA. 365:CAT-1 337:Vinci 264:HM7B: 149:Cycle 101:Vinci 18:HM-7B 2783:M45H 2724:RISE 2719:LEAP 2658:HM7B 2622:M45G 2589:Atar 2416:CNES 2190:P120 2170:HM7B 1946:SRMU 1871:M-34 1866:M-24 1861:M-14 1836:LK-1 1826:Rafe 1811:S200 1806:S139 1756:P230 1751:P120 1684:fuel 1568:AJ10 1430:LK-4 1325:UDMH 1275:S-3D 1196:RD-8 1035:RP-1 1006:M-10 950:BE-4 849:RL10 838:BE-7 797:LE-9 791:LE-7 786:LE-5 751:HM7B 672:fuel 644:for 640:and 597:2014 564:2014 532:2014 500:2017 407:and 371:and 316:HM7B 314:The 31:HM7B 2632:M88 2627:M53 2604:M45 1906:GEM 1801:S12 1746:P80 1741:PAP 1736:P-6 1731:P-4 1631:UK 1415:PS4 1345:HNO 1341:MON 1321:MMH 1225:H-1 1220:F-1 1039:LOX 881:LOX 844:J-2 700:LOX 440:HM4 377:bar 353:HM4 349:HM7 269:ECA 144:5:1 126:LOX 91:HM4 2822:: 1796:S9 1791:S7 1339:, 1328:/ 1319:, 1314:, 1037:/ 879:/ 874:CH 698:/ 693:LH 540:^ 508:^ 481:^ 290:: 194:lb 190:kN 131:LH 128:/ 2565:e 2558:t 2551:v 2127:) 2123:( 2010:e 2003:t 1996:v 1658:* 1652:* 1596:* 1585:* 1350:) 1347:3 1336:4 1334:O 1332:2 1330:N 1310:( 1041:) 1033:( 883:) 876:4 872:( 702:) 695:2 691:( 630:e 623:t 616:v 599:. 566:. 534:. 502:. 199:) 196:f 167:1 133:2 20:)

Index

HM-7B

Snecma
HM4
Vinci
Liquid-fuel engine
LOX
LH2
Gas-generator
kN
lbf
pressure
Specific impulse
Ariane 5
Ariane 4
Ariane 3
Ariane 2
Ariane 1
European
cryogenic
upper stage
rocket engine
Ariane rocket family
Vinci
HM4
Ariane 1
European Space Agency
CAT-1
Ariane 2
Ariane 3

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