1176:
284:
38:
372:, and thus heats up. It needs much more power to compress that heated air further by the engine's compressor section, which reduces the compressor's efficiency dramatically. Furthermore, this means that high-speed engines need to be made of materials that can survive extremely high
387:
that transfers the heat from the incoming air into the hydrogen fuel. This greatly cools the air, which allows the engines to burn more fuel even at very high speed, and allows the engines to be made of lighter, but more heat susceptible, materials such as light
104:
58:
This article has been missing dates since its creation in 2008: When did the first idea come about? When did construction start or when will it start? When was funding requested or received? And if so, when was it
376:. In practice, this inevitably makes the engines heavier and also reduces the amount of fuel that can be burned, to avoid melting the gas turbine section of the engine. This in turn reduces thrust at high speed.
392:. The engine inlet diffuser also has to slow the incoming air to subsonic speeds because if the air moved through the precooler and compressor at supersonic speeds, it would cause damage to them.
337:. The heat generated by the hypersonic airflow over the body puts constraints on window design which would make them too heavy. One solution Reaction Engines has proposed is to install
403:
engine features to give it good efficiency and subsonic (quiet) exhaust velocity at low speeds. Unlike SABRE, the A2's
Scimitar engine would not have rocket engine features.
1225:
649:
890:
63:
751:
255:, managing director of Reaction Engines, said "Our work shows that it is possible technically; now it's up to the world to decide if it wants it."
1095:
1105:
1215:
1205:
883:
266:
in under five hours, compared to around a complete day of travel with normal aircraft. The cost of a ticket is intended to be roughly
81:
1210:
509:
685:
627:
1220:
1180:
1051:
744:
660:
487:
Mach 5.0 (6,130 km/h) supersonic, or Mach 0.9 (1,102.54 km/h; 685.09 mph; 595.32 kn) subsonic
876:
1200:
1013:
53:
1158:
920:
988:
805:
737:
574:
467:
350:
319:, in order to minimise the travel time while avoiding flying supersonically over land, as there are concerns the
760:
513:: 40.9 kN‑s/kg (0.86 lb/(lbf⋅h)) at Mach 5.0; 96.0 kN‑s/kg (0.368 lb/(lbf⋅h)) at Mach 0.9
205:
153:
326:
The 143-metre-long (469 ft) A2 design is much longer than conventional jets, but would be lighter than a
493:
18,700 km (11,600 mi, 10,100 nmi) plus a 5,000 km (3,100 mi; 2,700 nmi) reserve
1120:
1033:
1056:
323:
generated by travelling at supersonic speed could cause significant discomfort for people on the ground.
1003:
800:
354:
201:
178:
231:, thus avoiding the problems inherent in earlier supersonic aircraft. The top speed is projected to be
899:
847:
774:
529:
470:
380:
362:
292:
252:
248:
182:
48:
1023:
915:
826:
821:
534:
978:
338:
220:
The vehicle is intended to have about 20,000 kilometres (11,000 nautical miles) range and good
600:
973:
779:
544:
296:
240:
225:
186:
1128:
998:
784:
236:
228:
283:
1061:
1018:
943:
910:
539:
384:
300:
267:
208:, who said it could be developed into a working aircraft within 25 years once there is
193:
135:
1194:
1090:
1008:
689:
358:
209:
983:
715:
396:
316:
221:
17:
1163:
1133:
968:
373:
232:
1046:
1041:
327:
320:
304:
119:
247:, and can be used to cool the vehicle and the air entering the engines via a
1153:
312:
263:
729:
938:
400:
244:
499:
28,000 m (92,000 ft) or 5,900 m (19,400 ft) subsonic
1110:
868:
308:
103:
575:"The hypersonic plane designed to reach Australia in under five hours"
357:
engine, which is intended for space launch, but here adapted for very
993:
842:
334:
259:
197:
719:
857:
852:
389:
369:
282:
688:(facts & figures). UK: Reaction Engines. 2012. Archived from
872:
733:
368:
Normally, as air enters a jet engine, it is compressed by the
31:
568:
566:
564:
562:
505:
5.9 at 25 km, Mach 5.0; 11 at 5.9 km, Mach 0.9;
330:. It could take off and land on current airport runways.
111:
Artist's concept of the
Reaction Engines Lapcat A2
379:
The key design feature for the
Scimitar engines is the
198:
Long-Term
Advanced Propulsion Concepts and Technologies
171:
Reaction
Engines Limited LAPCAT Configuration A2
1146:
1119:
1083:
1074:
1032:
961:
952:
931:
835:
814:
793:
767:
287:The LAPCAT A2 concept in the upper atmosphere
628:"Hypersonic flight: Brussels – Sydney in 5 hours"
353:use related technology to the company's earlier
258:The developers say it would be able to fly from
395:The rest of the engine is described as having
884:
745:
519:101 dBa at 450 m (1,480 ft) lateral
8:
460:198 t (437,000 lb) liquid hydrogen
295:, the A2 design could fly subsonically from
1080:
958:
891:
877:
869:
752:
738:
730:
192:The aircraft was designed, as part of the
82:Learn how and when to remove this message
1226:Proposed aircraft of the United Kingdom
648:Butterworth-Hayes, Philip (June 2008).
558:
341:, showing images of the scene outside.
93:
333:However, the A2 design does not have
185:intended to provide long range, high
7:
1096:Next Generation Supersonic Transport
1106:Zero Emission Hyper Sonic Transport
601:"Hypersonic passenger jet designed"
200:(LAPCAT) programme, by the British
573:Morris, Steven (5 February 2008).
448:900 m (9,700 sq ft)
436:139 m (456 ft 0 in)
25:
454:400,000 kg (881,849 lb)
442:41 m (134 ft 6 in)
1175:
1174:
303:then reaching Mach 5 across the
102:
36:
626:Tom Chivers (5 February 2008).
407:Specifications (LAPCAT A2)
239:as a fuel, which has twice the
1052:SAI Quiet Supersonic Transport
650:"Europe speeds up hypersonics"
315:. The route described isn't a
297:Brussels International Airport
1:
430:300 passengers (plus baggage)
183:hypersonic speed jet airliner
1014:Sud Aviation Super-Caravelle
235:5+. It calls for the use of
189:commercial transportation.
1159:Lockheed Martin X-59 QueSST
56:. The specific problem is:
27:Hypersonic jetliner concept
1242:
1101:Reaction Engines LAPCAT A2
989:High Speed Civil Transport
607:. UK: BBC. 5 February 2008
52:to meet Knowledge (XXG)'s
1216:Reaction Engines aircraft
1206:Hydrogen-powered aircraft
1172:
939:Aérospatiale/BAC Concorde
906:
510:Specific fuel consumption
468:Reaction Engines Scimitar
110:
101:
96:
761:Reaction Engines Limited
206:Reaction Engines Limited
154:Reaction Engines Limited
1211:Ramjet-powered aircraft
421:General characteristics
1057:Sukhoi-Gulfstream S-21
659:. AIAA. Archived from
288:
1221:Supersonic transports
1147:Experimental programs
1004:North American NAC-60
286:
202:aerospace engineering
900:Supersonic transport
530:Supersonic transport
471:Precooled jet engine
64:improve this article
1201:Hypersonic aircraft
1024:HyperMach SonicStar
916:Supersonic aircraft
815:Aircraft/spacecraft
535:Skylon (spacecraft)
452:Max takeoff weight:
339:flat panel displays
18:Reaction Engines A2
979:Convair Model 58-9
932:Historic airliners
289:
1188:
1187:
1142:
1141:
1070:
1069:
866:
865:
657:Aerospace America
415:Reaction engines.
363:high speed travel
167:
166:
92:
91:
84:
54:quality standards
45:This article may
16:(Redirected from
1233:
1178:
1177:
1081:
974:Bristol Type 223
959:
893:
886:
879:
870:
780:John Scott-Scott
754:
747:
740:
731:
725:
721:Reaction Engines
702:
701:
699:
697:
682:
676:
675:
673:
671:
665:
654:
645:
639:
638:
636:
634:
623:
617:
616:
614:
612:
597:
591:
590:
588:
586:
570:
545:Myasishchev M-50
497:Service ceiling:
480:
423:
351:Scimitar engines
241:specific impulse
226:supersonic speed
132:
124:Type of aircraft
106:
94:
87:
80:
76:
73:
67:
40:
39:
32:
21:
1241:
1240:
1236:
1235:
1234:
1232:
1231:
1230:
1191:
1190:
1189:
1184:
1168:
1138:
1129:Gulfstream X-54
1115:
1111:Hermeus Halcyon
1076:
1066:
1028:
999:Lockheed L-2000
954:
948:
927:
902:
897:
867:
862:
831:
810:
789:
785:Richard Varvill
763:
758:
714:
711:
706:
705:
695:
693:
692:on 9 March 2012
684:
683:
679:
669:
667:
666:on 7 March 2010
663:
652:
647:
646:
642:
632:
630:
625:
624:
620:
610:
608:
599:
598:
594:
584:
582:
572:
571:
560:
555:
526:
476:
419:
409:
347:
281:
276:
237:liquid hydrogen
229:fuel efficiency
218:
131:National origin
130:
125:
88:
77:
71:
68:
61:
41:
37:
28:
23:
22:
15:
12:
11:
5:
1239:
1237:
1229:
1228:
1223:
1218:
1213:
1208:
1203:
1193:
1192:
1186:
1185:
1173:
1170:
1169:
1167:
1166:
1161:
1156:
1150:
1148:
1144:
1143:
1140:
1139:
1137:
1136:
1131:
1125:
1123:
1117:
1116:
1114:
1113:
1108:
1103:
1098:
1093:
1087:
1085:
1078:
1072:
1071:
1068:
1067:
1065:
1064:
1062:Tupolev Tu-444
1059:
1054:
1049:
1044:
1038:
1036:
1030:
1029:
1027:
1026:
1021:
1019:Tupolev Tu-244
1016:
1011:
1006:
1001:
996:
991:
986:
981:
976:
971:
965:
963:
956:
950:
949:
947:
946:
944:Tupolev Tu-144
941:
935:
933:
929:
928:
926:
925:
924:
923:
913:
911:Civil aviation
907:
904:
903:
898:
896:
895:
888:
881:
873:
864:
863:
861:
860:
855:
850:
845:
839:
837:
833:
832:
830:
829:
824:
818:
816:
812:
811:
809:
808:
803:
797:
795:
791:
790:
788:
787:
782:
777:
771:
769:
765:
764:
759:
757:
756:
749:
742:
734:
728:
727:
710:
709:External links
707:
704:
703:
677:
640:
618:
592:
557:
556:
554:
551:
548:
547:
542:
540:Tupolev Tu-144
537:
532:
525:
522:
521:
520:
514:
506:
500:
494:
488:
474:
473:
461:
458:Fuel capacity:
455:
449:
443:
437:
431:
408:
405:
385:heat exchanger
346:
343:
301:North Atlantic
280:
277:
275:
272:
268:business class
217:
214:
194:European Union
175:LAPCAT A2
165:
164:
161:
157:
156:
151:
147:
146:
143:
139:
138:
136:United Kingdom
133:
127:
126:
123:
117:
113:
112:
108:
107:
99:
98:
90:
89:
44:
42:
35:
26:
24:
14:
13:
10:
9:
6:
4:
3:
2:
1238:
1227:
1224:
1222:
1219:
1217:
1214:
1212:
1209:
1207:
1204:
1202:
1199:
1198:
1196:
1183:
1182:
1171:
1165:
1162:
1160:
1157:
1155:
1152:
1151:
1149:
1145:
1135:
1132:
1130:
1127:
1126:
1124:
1122:
1121:Business jets
1118:
1112:
1109:
1107:
1104:
1102:
1099:
1097:
1094:
1092:
1091:Boom Overture
1089:
1088:
1086:
1082:
1079:
1073:
1063:
1060:
1058:
1055:
1053:
1050:
1048:
1045:
1043:
1040:
1039:
1037:
1035:
1034:Business jets
1031:
1025:
1022:
1020:
1017:
1015:
1012:
1010:
1009:Rockwell X-30
1007:
1005:
1002:
1000:
997:
995:
992:
990:
987:
985:
982:
980:
977:
975:
972:
970:
967:
966:
964:
960:
957:
951:
945:
942:
940:
937:
936:
934:
930:
922:
919:
918:
917:
914:
912:
909:
908:
905:
901:
894:
889:
887:
882:
880:
875:
874:
871:
859:
856:
854:
851:
849:
846:
844:
841:
840:
838:
834:
828:
825:
823:
820:
819:
817:
813:
807:
804:
802:
799:
798:
796:
792:
786:
783:
781:
778:
776:
773:
772:
770:
766:
762:
755:
750:
748:
743:
741:
736:
735:
732:
723:
722:
717:
713:
712:
708:
691:
687:
681:
678:
662:
658:
651:
644:
641:
629:
622:
619:
606:
602:
596:
593:
580:
576:
569:
567:
565:
563:
559:
552:
550:
546:
543:
541:
538:
536:
533:
531:
528:
527:
523:
518:
515:
512:
511:
507:
504:
503:Lift-to-drag:
501:
498:
495:
492:
489:
486:
485:Cruise speed:
483:
482:
481:
479:
472:
469:
465:
462:
459:
456:
453:
450:
447:
444:
441:
438:
435:
432:
429:
426:
425:
424:
422:
417:
416:
413:
406:
404:
402:
398:
393:
391:
386:
383:, which is a
382:
377:
375:
371:
366:
364:
360:
359:long distance
356:
352:
344:
342:
340:
336:
331:
329:
324:
322:
318:
314:
310:
307:and over the
306:
302:
298:
294:
291:According to
285:
278:
273:
271:
269:
265:
261:
256:
254:
250:
246:
242:
238:
234:
230:
227:
223:
215:
213:
211:
210:market demand
207:
203:
199:
195:
190:
188:
184:
180:
176:
172:
163:Design study
162:
159:
158:
155:
152:
149:
148:
145:Undetermined
144:
142:Manufacturer
141:
140:
137:
134:
129:
128:
121:
118:
115:
114:
109:
105:
100:
95:
86:
83:
75:
65:
60:
55:
51:
50:
43:
34:
33:
30:
19:
1179:
1100:
984:Douglas 2229
720:
694:. Retrieved
690:the original
680:
668:. Retrieved
661:the original
656:
643:
631:. Retrieved
621:
609:. Retrieved
604:
595:
583:. Retrieved
579:The Guardian
578:
549:
516:
508:
502:
496:
490:
484:
477:
475:
463:
457:
451:
445:
439:
433:
427:
420:
418:
414:
411:
410:
394:
378:
374:temperatures
367:
348:
332:
325:
317:great circle
290:
279:Capabilities
257:
219:
191:
181:study for a
174:
173:(called the
170:
168:
78:
69:
62:Please help
57:
46:
29:
1164:Quiet Spike
1134:Spike S-512
969:Boeing 2707
716:"LAPCAT A2"
633:10 February
478:Performance
464:Powerplant:
397:high-bypass
216:Development
66:if you can.
1195:Categories
1047:Aerion SBJ
1042:Aerion AS2
553:References
446:Wing area:
328:Boeing 747
321:sonic boom
305:North Pole
120:Hypersonic
97:Lapcat A2
59:abandoned?
1154:Boom XB-1
1084:Airliners
962:Airliners
775:Alan Bond
440:Wingspan:
428:Capacity:
412:Data from
381:precooler
313:Australia
299:into the
293:Alan Bond
264:Australia
253:Alan Bond
249:precooler
150:Designer
1181:Category
1077:projects
955:projects
953:Historic
806:Scimitar
768:Founders
696:30 March
686:"LAPCAT"
524:See also
401:turbofan
245:kerosene
222:subsonic
212:for it.
196:-funded
187:capacity
122:airliner
72:May 2022
47:require
1075:Current
836:Related
794:Engines
724:(video)
434:Length:
361:, very
345:Engines
335:windows
309:Pacific
270:level.
177:) is a
160:Status
49:cleanup
994:LAPCAT
843:LAPCAT
822:Skylon
670:3 July
611:3 July
585:3 July
517:Noise:
491:Range:
399:(4:1)
390:alloys
274:Design
260:Europe
179:design
858:HOTOL
853:RB545
848:SATAN
801:SABRE
664:(PDF)
653:(PDF)
370:inlet
355:SABRE
204:firm
116:Role
921:list
698:2012
672:2009
635:2020
613:2009
605:News
587:2009
581:. UK
466:4 ×
349:The
233:Mach
224:and
169:The
311:to
262:to
243:of
1197::
827:A2
718:,
655:.
603:.
577:.
561:^
365:.
251:.
892:e
885:t
878:v
753:e
746:t
739:v
726:.
700:.
674:.
637:.
615:.
589:.
85:)
79:(
74:)
70:(
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
