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Due to several modifications the LR-101 underwent over the years, there are many different variants of this engine. One of the first changes was the downrating of the engine to a lower thrust level, both because the engine provided far more thrust than required to steer the rocket and to save fuel
306:
in the vicinity of their primary engines to provide large arcs for the vernier thrusters. While the pair of LR-101s on the Atlas was mounted radially above the booster engines of the vehicle, on the Thor they were placed at the base of the vehicle.
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of the sustainer engine until it was shut off. After sustainer burnout, this pair of thrusters would switch to feed off the remaining propellant, effectively becoming a
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missile had planned on propelling his 'X-3 Volksrocket' with four
Rocketdyne LR-101 engines, but despite many test firings the rocket never left the ground.
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utilized in
American rocketry and has become a sought-after object for item collectors and
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for the main engines. Another major change was the replacement of the original
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1833:* Different versions of the engine use different propellant combinations
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Each of these rockets used two LR-101 secondary engines to provide
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LR-101 Thrust chamber on a gimbal mount designed by
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257:during their ascent to space. The pair of LR-101
444:"An Amateur Workhorse: The LR-101 Rocket Engine"
163:(Pressure-fed) 1,060 pounds-force (4,700 N)
199:(Pressure-fed) 209.8 seconds (2.057 km/s)
150:(Pressure-fed) 830 pounds-force (3,700 N)
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277:of the rocket before separating the payload.
261:would receive their propellant flow from the
8:
160:(Tank-fed) 1,017 pounds-force (4,520 N)
19:
1928:Rocket engines using the pressure-fed cycle
235:in the mid-to-late fifties and used in the
227:The LR-101 is a fixed thrust, single start
181:(Pressure-fed) 2.45 MPa (355 psi)
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419:"Heroicrelics - Small engines for big job"
196:(Tank-fed) 198.7 seconds (1.949 km/s)
25:
334:On the 'Galactic Aztec', the engine used
1913:Rocket engines using kerosene propellant
16:Vernier thruster developed by Rocketdyne
385:
394:"Heroicrelics - LR-101 Vernier Engine"
178:(Tank-fed) 2.1 MPa (300 psi)
18:
315:The LR-101 is one of the most common
7:
1852:
1850:
523:Comparison of orbital rocket engines
369:- The first rocket to use the LR-101
1933:Rocket engines of the United States
375:- The designer bureau of the LR-101
1866:. You can help Knowledge (XXG) by
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194:
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353:as well as the later commercial
1:
1319:RD-0202 to 0206, 0208 to 0213
311:Role in experimental rocketry
288:pyrotechnical ignition system
342:, which was utilized in the
1943:Spacecraft attitude control
1862:This rocketry article is a
338:as a propellant instead of
321:builders of amateur rockets
255:yaw, pitch and roll control
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290:with an igniter using a
1923:North American Aviation
1364:RD-250 to 252, 261, 262
292:hypergolic fuel mixture
1938:Spacecraft components
1840:are under development
1228:YF-20, 21, 22, 24, 25
1007:RD-107, 108, 117, 118
1329:RD-0216, 0217, 0235
992:RD-0107, 0108, 0110
267:Pressure-fed engine
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1918:Rocketdyne engines
351:ballistic missiles
323:. Rocket engineer
95:Liquid-fuel engine
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209:Rated for 184 Sec
155:Thrust, sea-level
40:Country of origin
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396:. Archived from
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296:Triethylaluminum
273:corrections and
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189:Specific impulse
80:Vernier Thruster
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1303:Paektusan LRE
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450:on 2020-12-25
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99:
96:
92:
88:
84:
81:
78:
74:
71:
68:
64:
61:
58:
54:
50:
46:
43:United States
42:
38:
34:
28:
23:
1868:expanding it
1861:
1837:
1378:
1299:North Korea
1070:
1063:
1031:
959:
947:
940:
918:
867:
860:
848:
836:
829:
822:
800:
793:
786:
769:
762:
755:
699:
692:
680:
658:
601:
594:
505:solid motors
452:. Retrieved
448:the original
438:
427:. Retrieved
423:the original
413:
402:. Retrieved
398:the original
388:
333:
314:
294:composed of
284:
252:
250:until 1990.
226:
123:Pressure-fed
66:Manufacturer
20:LR-101-NA-11
1836:Engines in
1483:RD-109, 119
1421:RD-864, 869
1406:RD-854, 861
1369:RD-253, 275
1017:RD-170, 171
367:SM-65 Atlas
348:PGM-17 Thor
344:SM-65 Atlas
329:PGM-17 Thor
220:PGM-17 Thor
191:, sea-level
142:Performance
76:Application
1907:Categories
1223:YF-1, 2, 3
1171:Hypergolic
1143:Rutherford
862:Prometheus
824:Archimedes
454:2020-12-25
429:2020-12-24
404:2020-12-24
380:References
373:Rocketdyne
271:trajectory
263:turbopumps
233:Rocketdyne
101:Propellant
70:Rocketdyne
60:Rocketdyne
1764:Castor 30
1644:Zefiro 40
1639:Zefiro 23
1580:SpaB-140C
977:NK-33, 44
887:cryogenic
733:Methalox
552:Hydrolox
544:Cryogenic
357:rockets.
206:Burn time
1779:Orbus-21
1634:Zefiro 9
1397:Ukraine
1175:Aerozine
1163:Storable
1055:Ukraine
997:RD-0110R
894:Kerolox
361:See also
281:Variants
172:pressure
170:Chamber
56:Designer
1838:italics
1799:Star 48
1794:Star 37
1774:Orbus-6
1695:Israel
1629:Waxwing
1585:Europe
1577:SpaB-65
1479:Russia
1344:RD-0237
1339:RD-0236
1310:Russia
1289:Israel
1249:Europe
1093:Kestrel
1039:S1.5400
1002:RD-0124
968:Russia
961:SCE-200
857:Europe
850:RD-0169
845:Russia
771:Longyun
764:Lingyun
682:RD-0146
676:RD-0120
667:Russia
624:Vulcain
610:Europe
533:Liquid
509:orbital
214:Used in
134:Chamber
89:Retired
1754:AJ-60A
1719:KM-V2b
1710:Japan
1684:Salman
1650:India
1624:Topaze
1589:Mage 1
1554:China
1545:Solid
1452:TR-201
1416:RD-856
1411:RD-855
1401:RD-843
1391:S5.98M
1380:RD-270
1274:India
1268:Viking
1258:Astris
1253:Aestus
1243:YF-50D
1219:China
1128:RS-27A
1118:Merlin
1108:LR-105
1072:RD-810
1065:RD-801
1049:TEPREL
1045:Spain
1033:RD-193
1022:RD-180
1012:RD-120
956:India
949:Welkin
942:YF-130
936:YF-115
931:YF-102
926:YF-100
910:China
838:Aeon R
831:Aeon 1
818:Raptor
802:YF-215
795:YF-209
788:TQ-15A
752:China
645:Japan
634:CE-7.5
630:India
585:YF-75D
571:China
86:Status
1819:X-254
1814:X-248
1804:UA120
1784:Orion
1759:Algol
1744:SRB-A
1739:M-34c
1714:KM-V1
1704:RSA-3
1680:Iran
1573:FG-47
1568:FG-46
1563:FG-36
1558:FG-02
1519:XLR81
1513:RS-88
1508:Curie
1498:Gamma
1473:Other
1457:XLR81
1446:RS-88
1441:LR-91
1436:LR-87
1386:S5.92
1314:17D61
1283:Vikas
1263:Vexin
1238:YF-40
1233:YF-23
1206:, or
1186:, or
1180:UH 25
1148:XLR50
1133:RS-56
1123:RS-27
1103:LR-89
1098:LR-79
982:RD-58
972:NK-15
920:TH-12
914:TH-11
885:Semi-
782:TQ-12
777:TQ-11
757:BF-20
722:RS-68
717:RS-25
694:BE-3U
639:CE-20
619:Vinci
603:YF-90
596:YF-79
590:YF-77
580:YF-75
575:YF-73
355:Delta
245:Delta
237:Atlas
115:Cycle
1864:stub
1809:SRMU
1734:M-34
1729:M-24
1724:M-14
1699:LK-1
1689:Rafe
1674:S200
1669:S139
1619:P230
1614:P120
1547:fuel
1431:AJ10
1293:LK-4
1188:UDMH
1138:S-3D
1059:RD-8
898:RP-1
869:M-10
813:BE-4
712:RL10
701:BE-7
660:LE-9
654:LE-7
649:LE-5
614:HM7B
535:fuel
507:for
503:and
346:and
340:RP-1
298:and
243:and
241:Thor
109:RP-1
51:1958
48:Date
1769:GEM
1664:S12
1609:P80
1604:PAP
1599:P-6
1594:P-4
1494:UK
1278:PS4
1208:HNO
1204:MON
1184:MMH
1088:H-1
1083:F-1
902:LOX
744:LOX
707:J-2
563:LOX
105:LOX
1909::
1659:S9
1654:S7
1202:,
1191:/
1182:,
1177:,
900:/
742:/
737:CH
561:/
556:LH
239:,
121:/
107:/
1895:e
1888:t
1881:v
1870:.
1521:*
1515:*
1459:*
1448:*
1213:)
1210:3
1199:4
1197:O
1195:2
1193:N
1173:(
904:)
896:(
746:)
739:4
735:(
565:)
558:2
554:(
493:e
486:t
479:v
457:.
432:.
407:.
137:1
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