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November 1967 to
January 1968. None were completely successful, so Johnson ordered his team to conduct a thorough review before renewing launch attempts. The next launch was on 10 April 1968. It also failed as the engine did not ignite. On 16 June the D-21B finally made a completely successful flight; it flew at the specified altitude and course for its full range, and the hatch was recovered. The next two launches were failures, followed by another successful flight in December. A test in February 1969 to check the inertial navigation system using an actual mission profile was a failure. The next two flights in May and July succeeded.
634:
361:(27,000 m) and speed of over Mach 3.3 (2,200 mph; 3,600 km/h), but was lost due to a hydraulic pump failure after a flight of over 1,200 nmi (1,400 mi; 2,200 km). The USAF's interest in the program continued and more D-21s were ordered after the second launch. A third flight took place on 16 June with the D-21 flying 1,550 nmi (1,800 mi; 2,900 km) through its complete flight profile; its camera hatch was not released due to an electronics failure.
619:
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221:(USAF) instructed Lockheed to study a high-speed, high-altitude drone concept. Johnson specified speeds of Mach 3.3–3.5, an operational altitude of 87,000–95,000 feet (27,000–29,000 m), and a range of 3,000 nautical miles (3,500 mi; 5,600 km). It was intended to make a one-way trip, eject its camera payload at the end of the mission for recovery, then self-destruct. It had a double-
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The
Chinese government never reported spotting the D-21B in flight. The first one failed to turn around and continued straight on, crashing in the Soviet Union. Another test flight was conducted on 20 February 1970 in a successful attempt to correct any problems. The second operational mission was on
173:
The D-21 was designed to carry a single high-resolution photographic camera over a preprogrammed path, then release the camera module into the air for retrieval, after which the drone would self-destruct. Following a fatal accident when launched from an M-21, the D-21 was modified to be launched from
448:
The first attempted launch of a D-21B was on 28 September 1967, but the drone fell off the B-52's launch pylon due to a stripped nut on the pylon before the aircraft reached its intended launch point. Johnson admitted that the incident was "very embarrassing". Three more launches were performed from
395:
to get it up to speed. The drone was modified by adding attachment points on its spine to mate with the carrying pylon on the B-52 and its belly attachment points were adapted to accommodate the rocket booster necessary to increase its speed and allow its ramjet to operate. Its vertical stabilizer
523:
or at sea is unknown), but only one yielded any usable photographs. The use of improper film processing equipment caused the emulsion on the first drone's film to separate from its base, rendering the photographs unusable. In the other mission, the film development process was completed with no
360:
The D-21 was first launched from an M-21 on 5 March 1966. The drone was released but stayed close to the M-21's back for a few seconds, which seemed like "two hours" to the M-21 crew. A second launch took place on 27 April 1966; the D-21 reached its operational altitude of 90,000 ft
169:
aircraft. The drone had maximum speed in excess of Mach 3.3 (2,200 miles per hour; 3,600 kilometers per hour) at an operational altitude of 90,000 feet (27,000 meters). Development began in
October 1962. Originally known by the Lockheed designation Q-12, the drone was intended for
282:
in the meantime. The CIA was not enthusiastic about the Q-12, mostly because the agency was overextended at the time with U-2 missions, getting the A-12 up to speed and covert operations in
Southeast Asia. The USAF was interested in the Q-12 as both a reconnaissance platform and a
440:
on the bottom to stabilize it while the rocket was firing. The booster had a burn time of 87 seconds and a thrust of 27,300 pounds-force (121 kN). During ground handling everyone within 25 feet (7.6 m) was required to wear anti-static straps to prevent any
267:, required modification, since it was only designed to burn as long as the missile needed to hit a target, while the Q-12's engine needed to operate at high temperatures for at least an hour and a half at high altitudes. The modified engine was designated
333:(D- for "daughter" and M- for "mother"). Two of the original 18 A-12 aircraft were designated as M-21s with serial numbers 60-6940 and 60-6941. The M-21 was a two-seat version of the A-12, with a pylon on the fuselage centerline between the
306:, a technique that had been developed by the USAF to recover film canisters from balloons and satellites. If the C-130 missed, the hatch was equipped with flotation devices so it could be recovered by ship if released over water.
420:
systems were added, and high-speed cameras were installed to track the drones as they separated from the pylons. The launch control officer on the B-52H could communicate with the D-21B and could make it self-destruct.
543:"boneyard" near Tucson, Arizona, in 1976 and 1977. With the base open to the public, the D-21 drones were quickly spotted and photographed. The Air Force called them GTD-21Bs with the GT standing for Ground Training.
372:
and struck the M-21's tail after separation, leading to the destruction of both aircraft. The two crew ejected and landed at sea. The pilot, Bill Park, survived, but the Launch
Control Officer, Ray Torrick, drowned.
4048:
511:
According to writer Lloyd
Spanberger, at least two additional operational D-21B flights may have been made. Spanberger cites an interview with Lt. Col. Alfred Crane, who worked with classified
500:
that tried to retrieve the hatch ran it down and it sank. The fourth, and last, Senior Bowl flight was on 20 March 1971. It was lost over China on the final segment of the route over China's
278:
of the Q-12 was ready by 7 December 1962, and had already undergone preliminary tests to measure its radar cross-section. Marquardt had also successfully tested the modified RJ-43 in its
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302:. These components were built into a module that fit into the bay and was known as a "hatch". The hatch would be ejected at the end of the mission and then snagged out of the air by a
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519:, in which Crane described processing two D-21B film capsules, both from flights over China. In both cases, the hatch was successfully recovered (whether in midair using the
314:
systems; new construction techniques and materials had to be developed for the systems to withstand the high temperatures, extreme vibrations and lack of space in the D-21.
1802:
708:
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16 December 1970. The D-21B reached Lop Nor and returned to the recovery point, but the hatch had a partial parachute failure and was lost at sea with its photographs.
1519:
436:
booster was both larger and heavier than the drone; it was 44 feet 4 inches (14 m) long and weighed 13,286 pounds (6,000 kg). It had a folding
890:
667:
535:'s rapprochement with China. A total of 38 D-21 and D-21B drones had been built, 21 of which were expended in launches. The remaining 17 were initially stored at
287:
and the CIA finally decided to work with the USAF to develop the new drone. Lockheed was awarded a contract in March 1963 for full-scale development of the Q-12.
178:. Several successful test flights were made, followed by at least four unsuccessful operational D-21 flights over China, before the program was canceled in 1971.
47:
364:
The fourth and final launch from an M-21 on 30 July ended in disaster. Unlike the three previous launches this one was performed straight and level, not in an
1114:
492:
During the third operational mission, on 4 March 1971, the D-21B flew to Lop Nor and returned, and released the hatch, which deployed its parachute, but the
1420:
546:
The fate of the D-21 that had disappeared on the first operational flight was revealed in
February 1986 when an official from the CIA returned a panel to
225:
similar to the A-12's wing design. The Q-12 was to be air-launched from the back of an A-12, and used key technology from the A-12 project, including
217:, the leader of Skunk Works, developed the concept of a long-range drone that used much of the A-12's technology. In October 1962, the CIA and the
1795:
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2017:
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On 23 July 1971, the D-21B program was canceled due to its poor success rate, the introduction of a new generation of photo reconnaissance
404:). Two B-52Hs were modified to carry two drones each by means of two large underwing pylons that replaced the smaller pylons used for the
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engine, which operates as a ramjet or rocket, depending on its flight regime. Ultimately NASA used a derivative of the agency's
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353:, but had to be removed after the first few tests, as no way of discarding them at Mach 3 without damaging the drone or
263:. Marquardt and Lockheed had already collaborated on several programs and had a close working relationship. The engine, the
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Rear view of the D-21 and M-21 combination on the ground, showing the exhaust shroud used on early flights
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agent. The drone had self-destructed over
Siberia and the Soviets had recovered the wreckage. The
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1611:. Warbird Tech. Vol. 10 (Revised ed.). North Branch, Minnesota: Specialty Press.
618:
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to assist in the separation of the drone from the aircraft. The D-21 suffered an engine
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3351:
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3166:
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2615:
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2359:
2354:
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2200:
1996:
824:
691:
606:
504:; wreckage was found by local authorities. In 2010, after being in the junkyard of the
350:
284:
268:
264:
1761:
Loss of M-21 and D-21, including video of successful launches and the midair collision
469:. These were conducted over China from 9 November 1969 to 20 March 1971 to spy on the
396:
was increased in size by approximately 20%. The modified drone version was designated
4037:
3551:
3256:
2869:
2854:
2849:
2686:
2584:
2401:
2386:
2231:
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1882:
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1115:"Interview with James A. Cunningham, Jr. (Director of Development Projects Division)"
878:
702:
564:
532:
354:
330:
256:
191:
166:
162:
3686:
3451:
3361:
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2457:
2105:
457:
424:
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206:
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A D-21B being launched, illustrating the size of the booster relative to the drone
465:
At least four operational missions with the D-21B took place under the code name
2778:
409:
346:
279:
210:
187:
41:
1714:
1691:
416:
officer's stations were replaced with two launch control stations. Command and
2783:
1627:
317:
222:
152:
1597:
1568:
580:
528:
497:
417:
376:
345:
A D-21 mounted on an M-21 began captive flight-testing on 22 December 1964.
307:
1536:
Donald, David, ed. (2003). "Lockheed's
Blackbirds: A-12, YF-12 and SR-71".
349:
covers were initially placed over the D-21's intake and exhaust to reduce
17:
1628:"Design and Development of the Blackbird: Challenges and Lessons Learned"
596:
516:
329:; the Q-12 was re-designated D-21 while the A-12 version launcher became
311:
226:
1776:
Photos of
Lockheed D-21B No. 527 in China Aviation Museum, Beijing
1496:"Operational Limits and Characteristics During Mated Flight and Launch"
650:
591:
555:
470:
369:
1555:
Goodall, James C. and Nora D. (2002). "Senior Bowl–the Lockeed D-21".
387:
Following the accident, Johnson suggested launching the D-21 from the
236:
827:
299:
275:
253:
245:
161:. The D-21 was initially designed to be launched from the back of an
213:
in 1960, several different concepts were proposed as alternatives.
632:
622:
617:
605:
590:
456:
423:
375:
316:
235:
675:
572:
482:
1784:
1141:"Lockheed D-21B No. 527 now in the China Aviation Museum"
551:
461:
A full view of same B-52 as above with both D-21B drones shown
1651:(Revised ed.). Leicester, England: Midland Publishing.
1579:
OKB Tupolev: A History of the Design Bureau and its Aircraft
1693:
Dark Eagles: A History of Top Secret U.S. Aircraft Programs
851:
2,524 mph (4,062 km/h, 2,193 kn) (Mach 3.32)
562:
the wreck and produced plans for a Soviet copy, named the
508:
for years, the wreckage was moved to the exhibition area.
1697:(Revised ed.). Novato, California: Presidio Press.
298:
were carried in a cramped "Q-bay" below the drone's air
694:, wreckage of the unit lost over China on 20 March 1971
1563:. Norwalk, Connecticut: AIRtime Publishing: 106–119.
4049:
1960s United States military reconnaissance aircraft
1494:
Cantrell Jr; Cassidy, C. R.; M. D. (1 August 1967).
595:
D-21 on display at the Blackbird Airpark, Air Force
3842:
2838:
2822:
2771:
2740:
2639:
2603:
2577:
2502:
2466:
2415:
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2078:
2005:
1939:
1891:
1830:
1823:
137:
129:
121:
116:
108:
93:
81:
73:
59:
54:
34:
1713:
1690:
653:, Washington (mounted on remaining M-21 #60-6940)
4054:Unmanned military aircraft of the United States
1766:Directory of U.S. Military Rockets and Missiles
473:. The USAF's 4200th Support Squadron, based at
891:List of military aircraft of the United States
668:National Museum of the United States Air Force
496:failed and the hatch fell into the water. The
477:, California, flew the missions, usually from
1796:
1353:. Pima Air & Space Museum. Archived from
986:
984:
857:3,500 mi (5,600 km, 3,000 nmi)
583:hypersonic test vehicle for the experiments.
8:
1540:. Norwalk, Connecticut: AIRtime Publishing.
1518:: CS1 maint: multiple names: authors list (
1047:Goodall and Goodall 2002, pp. 109, 113, 117.
709:Aerospace Maintenance and Regeneration Group
610:A close-up rear view of D-21 on M-21 at the
524:further obstacles, according to Spanberger.
1605:Landis, Tony R.; Dennis R. Jenkins (2005).
1299:
1297:
1147:on 18 April 2019. Retrieved 29 August 2011.
3839:
2376:
2185:
1827:
1803:
1789:
1781:
1576:Gordon, Yefim; Rigamant, Vladimir (2005).
1280:"U.S. Air Force Fact Sheet Lockheed D-21B"
1082:
1080:
1007:
1005:
938:
936:
337:to carry the drone in a nose-up attitude.
31:
27:1962 American Mach 3+ reconnaissance drone
1582:. Hinckley, England: Midland Publishing.
926:
924:
575:considered using a D-21 to test a hybrid
380:A modified D-21 carried on the wing of a
170:reconnaissance deep into enemy airspace.
1313:"Lockheed D-21 No. 527 SR-71 Drone"
244:Johnson wanted to power the Q-12 with a
1720:. Boston: Little, Brown & Company.
1421:"The Story of our D21: Article "#538?""
1104:Goodall and Goodall 2002, pp. 112, 118.
911:
805:19 ft 0.25 in (5.7976 m)
48:United States Air Force National Museum
1511:
1065:Goodall and Goodall 2002, pp. 115–116.
960:Goodall and Goodall 2002, pp. 112–114.
951:Goodall and Goodall 2002, pp. 106–107.
811:7 ft 0.25 in (2.1400 m)
1448:. Beale Air Force Base. 29 March 2013
1282:. National Museum of the US Air Force
1217:Gordon and Rigamant 2005, pp. 325–27.
1117:. CIA. 4 October 1983. Archived from
830:, 1,500 lbf (6.7 kN) thrust
7:
1739:. Bloomington: Xlibris Corporation.
1632:NASA Technical Reports Server (NTRS)
1161:. Bloomington: Xlibris Corporation.
799:42 ft 10 in (13.06 m)
1475:Landis and Jenkins 2005, pp. 23–25.
1226:Landis and Jenkins 2005, pp. 28–29.
1143:. Airforceworld.com. Archived from
1038:Landis and Jenkins 2005, pp. 25–26.
1029:Landis and Jenkins 2005, pp. 24–25.
550:that he had been given by a Soviet
325:In late 1963 the project was named
165:carrier aircraft, a variant of the
785:Pace, Landis & Jenkins, Donald
25:
1446:"Cold War drone calls Beale home"
1086:Goodall and Goodall 2002, p. 118.
1011:Goodall and Goodall 2002, p. 108.
978:Goodall and Goodall 2002, p. 109.
969:Goodall and Goodall 2002, p. 107.
930:Goodall and Goodall 2002, p. 106.
726:(adjacent to Davis-Monthan AFB),
568:(Raven), but it was never built.
1626:Merlin, Peter (5 January 2009).
680:D-21B #525 – Blackbird Airpark,
539:, California, then moved to the
186:In the 1960s, Lockheed's secret
40:
1190:Landis and Jenkins 2005, p. 28.
672:Wright-Patterson Air Force Base
445:that might ignite the booster.
443:discharge of static electricity
1771:Weapons of Precise Destruction
1712:Rich, Ben; Janos, Leo (1996).
1557:International Air Power Review
863:95,000 ft (29,000 m)
817:11,000 lb (4,990 kg)
778:Specifications (Lockheed D-21)
1:
1649:Lockheed Martin's Skunk Works
1399:"Lockheed D-21B (#537) Drone"
63:High-altitude and high speed
4084:Aircraft first flown in 1964
4069:Tailless delta-wing aircraft
713:Davis–Monthan Air Force Base
541:Davis–Monthan Air Force Base
321:M-21 carrying D-21 in flight
4059:Single-engined jet aircraft
1426:. Southern Museum of Flight
1379:. Evergreen Aviation Museum
724:Pima Air & Space Museum
627:Pima Air & Space Museum
577:rocket-based combined cycle
233:reduction design features.
199:Central Intelligence Agency
98:Central Intelligence Agency
4100:
1735:Spanberger, Lloyd (2014).
1157:Spanberger, Lloyd (2014).
391:bomber and adding a solid
389:Boeing B-52 Stratofortress
341:Testing and carrier change
296:inertial navigation system
176:Boeing B-52 Stratofortress
4074:Unmanned stealth aircraft
4022:
1689:Peebles, Curtiss (1999).
1181:Peebles 1999, pp. 133–34.
896:List of Lockheed aircraft
758:Southern Museum of Flight
734:Evergreen Aviation Museum
662:Sonoma County, California
471:Lop Nor nuclear test site
46:A D-21 on display at the
39:
1668:Lockheed SR-71 Blackbird
1484:Donald 2003, pp. 154–55.
1401:. March Field Air Museum
918:Donald 2003, pp. 154–56.
658:Pacific Coast Air Museum
4064:Ramjet-powered aircraft
1818:aircraft and spacecraft
1330:"GTD-21 TAGBOARD DRONE"
790:General characteristics
688:Chinese Aviation Museum
639:Chinese Aviation Museum
479:Andersen Air Force Base
434:solid-propellant rocket
219:United States Air Force
195:reconnaissance aircraft
102:United States Air Force
1239:. The Museum of Flight
1237:"Lockheed D-21B Drone"
825:Marquardt RJ43-MA-20S4
772:Marysville, California
748:March Air Reserve Base
744:March Field Air Museum
641:
630:
615:
603:
515:and drones during the
462:
429:
384:
322:
261:surface-to-air missile
241:
182:Design and development
2006:C-130 Hercules family
1873:8-D, E & G Altair
1208:Peebles 1999, p. 134.
1199:Peebles 1999, p. 132.
1131:Peebles 1999, p. 131.
1074:Peebles 1999, p. 129.
1056:Peebles 1999, p. 127.
999:Peebles 1999, p. 125.
752:Riverside, California
636:
621:
609:
594:
537:Norton Air Force Base
506:China Aviation Museum
460:
427:
408:cruise missiles. The
379:
320:
250:Marquardt Corporation
239:
190:developed the Mach 3
2215:Shooting Star family
2079:L-188 Electra family
1940:Constellation family
1737:Our mission revealed
1666:Pace, Steve (2004).
1647:Miller, Jay (1995).
1159:Our mission revealed
1095:Miller 1995, p. 141.
990:Donald 2003, p. 155.
768:Beale Air Force Base
682:Palmdale, California
601:Palmdale, California
475:Beale Air Force Base
335:vertical stabilizers
248:engine built by the
1608:Lockheed Blackbirds
1121:on 23 January 2017.
873:Related development
762:Birmingham, Alabama
738:McMinnville, Oregon
587:Aircraft on display
453:Operational history
290:The camera and its
231:radar cross-section
55:General information
4079:Composite aircraft
2246:Starfighter family
1377:"Support Aircraft"
699:Grissom Air Museum
642:
637:D-21 wreck in the
631:
616:
604:
571:In the late 1990s
560:reverse-engineered
463:
430:
414:electronic warfare
385:
357:could be devised.
323:
242:
4044:Lockheed aircraft
4029:
4028:
4018:
4017:
2573:
2572:
2368:
2367:
2177:
2176:
1904:12 Electra Junior
1746:978-1-49901-113-5
1466:Pace 2004, p. 63.
1303:Pace 2004, p. 64.
1168:978-1-49901-113-5
942:Pace 2004, p. 55.
629:, Tucson, Arizona
229:construction and
201:(CIA). After the
145:
144:
122:Introduction date
16:(Redirected from
4091:
3991:
3986:
3976:
3956:
3946:
3921:
3916:
3901:
3891:
3881:
3866:
3861:
3840:
3048:
3043:
3033:
2993:
2978:
2938:
2918:
2876:
2380:Blackbird family
2377:
2189:Lightning family
2186:
1977:L-1649 Starliner
1909:14 Super Electra
1859:
1828:
1805:
1798:
1791:
1782:
1750:
1731:
1719:
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1696:
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1406:
1395:
1389:
1388:
1386:
1384:
1373:
1367:
1366:
1364:
1362:
1351:"Lockheed D-21B"
1347:
1341:
1340:
1338:
1336:
1326:
1320:
1319:, 5 August 2010.
1310:
1304:
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979:
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961:
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952:
949:
943:
940:
931:
928:
919:
916:
861:Service ceiling:
838:
792:
647:Museum of Flight
625:and D-21 at the
612:Museum of Flight
531:, and President
406:AGM-28 Hound Dog
133:22 December 1964
44:
32:
21:
4099:
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3859:
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3046:
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2991:
2976:
2936:
2916:
2874:
2841:
2834:
2818:
2767:
2736:
2635:
2599:
2569:
2530:Desert Hawk III
2520:Cormorant (UAV)
2498:
2484:YO-3 Quiet Star
2462:
2438:P2V/P-2 Neptune
2416:Maritime patrol
2411:
2392:SR-71 Blackbird
2364:
2308:
2277:
2241:
2210:
2182:Fighter-bombers
2173:
2110:
2074:
2001:
1935:
1887:
1857:
1819:
1816:Lockheed Martin
1809:
1757:
1747:
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870:
834:
788:
780:
728:Tucson, Arizona
717:Tucson, Arizona
589:
502:Yunnan province
494:midair recovery
455:
343:
304:JC-130 Hercules
184:
151:is an American
104:
74:National origin
50:
28:
23:
22:
15:
12:
11:
5:
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3209:
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3009:
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2999:
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2775:
2773:
2769:
2768:
2766:
2765:
2760:
2755:
2750:
2744:
2742:
2741:Light aircraft
2738:
2737:
2735:
2734:
2729:
2724:
2719:
2714:
2709:
2704:
2699:
2694:
2689:
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2674:
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2664:
2659:
2654:
2649:
2643:
2641:
2637:
2636:
2634:
2633:
2628:
2623:
2621:AH-56 Cheyenne
2618:
2613:
2607:
2605:
2601:
2600:
2598:
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2383:
2381:
2374:
2373:Reconnaissance
2370:
2369:
2366:
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2363:
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2332:
2327:
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2255:
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2240:
2239:
2234:
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2218:
2216:
2212:
2211:
2209:
2208:
2203:
2198:
2192:
2190:
2183:
2179:
2178:
2175:
2174:
2172:
2171:
2166:
2164:Vega Starliner
2161:
2156:
2151:
2150:
2149:
2142:L-1011 Tristar
2139:
2134:
2129:
2124:
2118:
2116:
2112:
2111:
2109:
2108:
2103:
2098:
2093:
2088:
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2076:
2075:
2073:
2072:
2067:
2062:
2057:
2052:
2047:
2046:
2045:
2035:
2030:
2025:
2020:
2015:
2009:
2007:
2003:
2002:
2000:
1999:
1994:
1989:
1984:
1979:
1974:
1969:
1964:
1959:
1954:
1949:
1943:
1941:
1937:
1936:
1934:
1933:
1928:
1923:
1918:
1917:
1916:
1906:
1901:
1895:
1893:
1892:Electra family
1889:
1888:
1886:
1885:
1880:
1875:
1870:
1865:
1860:
1855:
1850:
1845:
1840:
1838:1 & 2 Vega
1834:
1832:
1825:
1821:
1820:
1810:
1808:
1807:
1800:
1793:
1785:
1779:
1778:
1773:
1768:
1763:
1756:
1755:External links
1753:
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846:
843:Maximum speed:
832:
831:
818:
812:
806:
800:
779:
776:
775:
774:
764:
754:
740:
730:
720:
705:
695:
692:Beijing, China
684:
678:
664:
654:
588:
585:
558:design bureau
513:spy satellites
454:
451:
400:(there was no
393:rocket booster
342:
339:
292:film magazines
285:cruise missile
183:
180:
156:reconnaissance
143:
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127:
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65:reconnaissance
61:
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2763:Little Dipper
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2631:VH-92 Patriot
2629:
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2626:VH-71 Kestrel
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2453:CP-140 Aurora
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2282:Raptor family
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2026:
2024:
2021:
2019:
2016:
2014:
2011:
2010:
2008:
2004:
1998:
1995:
1993:
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1988:
1985:
1983:
1980:
1978:
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1970:
1968:
1965:
1963:
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1955:
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1947:Constellation
1945:
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1843:3 Air Express
1841:
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1729:
1727:0-316-74300-3
1723:
1718:
1717:
1710:
1706:
1704:0-89141-696-X
1700:
1695:
1694:
1687:
1683:
1681:1-86126-697-9
1677:
1673:
1672:Crowood Press
1669:
1664:
1660:
1658:1-85780-037-0
1654:
1650:
1645:
1633:
1629:
1624:
1620:
1618:1-58007-086-8
1614:
1610:
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1599:
1595:
1591:
1589:1-85780-214-4
1585:
1581:
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1574:
1570:
1566:
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1553:
1549:
1547:1-880588-67-6
1543:
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1497:
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1447:
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1400:
1394:
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1378:
1372:
1369:
1357:on 5 May 2018
1356:
1352:
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1343:
1331:
1325:
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1300:
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921:
915:
912:
906:
901:
897:
894:
892:
889:
888:
887:
886:
885:Related lists
880:
879:Lockheed M-21
877:
876:
875:
874:
867:
862:
859:
856:
853:
850:
849:Cruise speed:
847:
844:
841:
840:
839:
837:
829:
826:
822:
819:
816:
815:Gross weight:
813:
810:
807:
804:
801:
798:
795:
794:
793:
791:
786:
784:
777:
773:
769:
766:D-21B #539 –
765:
763:
759:
756:D-21B #538 –
755:
753:
749:
745:
742:D-21B #537 –
741:
739:
735:
732:D-21B #534 –
731:
729:
725:
722:D-21B #533 –
721:
718:
714:
710:
707:D-21B #530 –
706:
704:
703:Peru, Indiana
700:
697:D-21B #528 –
696:
693:
689:
686:D-21B #527 –
685:
683:
679:
677:
673:
669:
666:D-21B #524 –
665:
663:
659:
656:D-21B #522 –
655:
652:
648:
645:D-21B #510 –
644:
643:
640:
635:
628:
624:
620:
613:
608:
602:
598:
593:
586:
584:
582:
578:
574:
569:
567:
566:
561:
557:
553:
549:
544:
542:
538:
534:
533:Richard Nixon
530:
525:
522:
518:
514:
509:
507:
503:
499:
495:
490:
486:
484:
480:
476:
472:
468:
459:
452:
450:
446:
444:
439:
435:
426:
422:
419:
415:
411:
407:
403:
399:
394:
390:
383:
378:
374:
371:
367:
362:
358:
356:
355:carrier plane
352:
348:
340:
338:
336:
332:
328:
319:
315:
313:
309:
305:
301:
297:
293:
288:
286:
281:
277:
274:A full-scale
272:
270:
266:
262:
258:
257:CIM-10 Bomarc
255:
251:
247:
238:
234:
232:
228:
224:
220:
216:
215:Kelly Johnson
212:
208:
204:
203:shooting down
200:
196:
193:
189:
181:
179:
177:
171:
168:
167:Lockheed A-12
164:
160:
157:
154:
150:
149:Lockheed D-21
140:
136:
132:
128:
124:
120:
115:
111:
107:
103:
99:
96:
94:Primary users
92:
89:
86:
84:
80:
77:United States
76:
72:
69:
66:
62:
58:
53:
49:
43:
38:
33:
30:
19:
4031:
4024:Not assigned
2672:Star Clipper
2640:Experimental
2467:Other crewed
2433:PV-2 Harpoon
2428:PV-1 Ventura
2406:
1736:
1715:
1692:
1667:
1648:
1636:. Retrieved
1631:
1607:
1578:
1560:
1556:
1537:
1530:Bibliography
1502:. Retrieved
1489:
1480:
1471:
1462:
1450:. Retrieved
1440:
1428:. Retrieved
1415:
1403:. Retrieved
1393:
1381:. Retrieved
1371:
1359:. Retrieved
1355:the original
1345:
1333:. Retrieved
1324:
1316:
1308:
1284:. Retrieved
1274:
1262:. Retrieved
1259:"D-21 Drone"
1253:
1241:. Retrieved
1231:
1222:
1213:
1204:
1195:
1186:
1177:
1158:
1152:
1145:the original
1136:
1127:
1119:the original
1109:
1100:
1091:
1070:
1061:
1052:
1043:
1034:
1025:
1020:Merlin, 2009
1016:
995:
974:
965:
956:
947:
914:
884:
883:
872:
871:
860:
854:
848:
842:
835:
833:
820:
814:
808:
802:
796:
789:
787:
782:
781:
570:
563:
545:
526:
510:
491:
487:
466:
464:
447:
431:
401:
397:
386:
366:outside loop
363:
359:
344:
326:
324:
289:
273:
269:RJ43-MA20S-4
243:
185:
172:
148:
146:
130:First flight
109:Number built
83:Manufacturer
29:
2667:Senior Prom
2604:Helicopters
2525:Desert Hawk
2313:Other types
2115:Other types
1921:18 Lodestar
1831:Vega family
1716:Skunk Works
1670:. Swindon:
1452:18 November
836:Performance
821:Powerplant:
711:(AMARG) on
467:Senior Bowl
410:tail gunner
347:Aerodynamic
280:wind tunnel
259:long-range
211:Gary Powers
209:piloted by
188:Skunk Works
4038:Categories
2814:Trident II
2784:High Virgo
2748:Big Dipper
2662:Senior Peg
2565:X-44 (UAV)
2458:P-7 LRAACA
2443:S-3 Viking
2304:X-44 MANTA
1931:43 Harpoon
1926:37 Ventura
1914:414 Hudson
1899:10 Electra
1863:7 Explorer
1848:4 Explorer
1824:Transports
1638:24 January
1538:Black Jets
1317:flickr.com
902:References
614:in Seattle
529:satellites
310:built the
265:RJ43-MA-11
223:delta wing
153:supersonic
18:D-21 drone
2809:Trident I
2794:Ping-Pong
2647:Have Blue
2448:P-3 Orion
2132:Excalibur
1883:DL.1 Vega
1598:475344733
1569:1473-9917
1430:16 August
907:Citations
845:Mach 3.35
803:Wingspan:
783:Data from
498:destroyer
418:telemetry
308:Honeywell
3482:400 (II)
3362:282 (II)
2804:Poseidon
2772:Missiles
2753:Explorer
2578:Trainers
1868:8 Sirius
1812:Lockheed
1514:cite web
1504:29 March
1383:15 March
868:See also
597:Plant 42
548:Ben Rich
517:Cold War
438:tail fin
327:Tagboard
312:avionics
294:with an
252:for the
227:titanium
197:for the
88:Lockheed
3477:400 (I)
3357:282 (I)
2842:numbers
2830:J37/T35
2823:Engines
2799:Polaris
2789:Perseus
2545:Polecat
2540:MQM-105
2510:Aequare
2273:CL-1200
2263:NF-104A
2137:JetStar
2043:EC-130H
1878:9 Orion
1243:5 April
809:Height:
797:Length:
770:, near
651:Seattle
556:Tupolev
412:'s and
370:unstart
205:of the
138:Retired
117:History
2611:CL-475
2555:RQ-170
2515:AQM-60
2474:CL-400
2423:Hudson
2268:CL-288
2253:XF-104
2159:Saturn
2154:L-2000
2101:CP-140
2065:WC-130
2060:MC-130
2055:LC-130
2050:KC-130
2038:EC-130
2033:HC-130
2028:DC-130
2023:AC-130
2018:C-130J
1992:EC-121
1972:L-1249
1967:L-1049
1853:5 Vega
1743:
1724:
1701:
1678:
1655:
1634:. NASA
1615:
1596:
1586:
1567:
1544:
1165:
855:Range:
828:ramjet
521:JC-130
300:intake
276:mockup
254:Boeing
246:ramjet
3955:27–32
3890:12–14
2840:Model
2779:Agena
2758:L-402
2697:X-26B
2692:X-24C
2677:XC-35
2657:L-301
2652:L-133
2616:XH-51
2595:T-50A
2560:SR-72
2397:YF-12
2360:YP-24
2355:XF-90
2350:XFM-2
2345:F-117
2320:A-4AR
2299:FB-22
2289:YF-22
2258:F-104
2206:XP-58
2201:XP-49
2127:C-141
2086:L-188
2070:L-100
2013:C-130
1997:XB-30
1987:C-121
1962:L-749
1957:L-649
1952:L-049
1499:(PDF)
1424:(PDF)
1405:4 May
1361:4 May
1335:4 May
1286:4 May
1264:4 May
701:near
623:SR-71
581:X-43A
565:Voron
402:D-21A
398:D-21B
159:drone
68:drone
3880:7–10
3843:Vega
3834:2329
3829:2000
3824:1980
3819:1800
3814:1700
3809:1649
3804:1600
3799:1549
3794:1449
3789:1400
3784:1329
3779:1249
3774:1237
3769:1236
3764:1235
3759:1201
3754:1200
3749:1195
3744:1149
3739:1132
3734:1090
3729:1080
3724:1060
3712:1049
3707:1026
3702:1020
3697:1011
3692:1010
3687:1000
2732:XV-4
2722:X-59
2717:X-56
2712:X-55
2707:X-35
2702:X-33
2687:X-17
2585:T-33
2550:RQ-3
2535:Fury
2503:UAVs
2494:TR-X
2489:TR-1
2407:D-21
2402:M-21
2387:A-12
2340:F-35
2335:F-21
2330:F-16
2294:F-22
2232:T-33
2227:F-94
2222:F-80
2196:P-38
2096:EP-3
1982:C-69
1814:and
1741:ISBN
1722:ISBN
1699:ISBN
1676:ISBN
1653:ISBN
1640:2024
1613:ISBN
1594:OCLC
1584:ISBN
1565:ISSN
1542:ISBN
1520:link
1506:2022
1454:2017
1432:2021
1407:2018
1385:2011
1363:2018
1337:2018
1288:2018
1266:2018
1245:2011
1163:ISBN
823:1 Ă—
676:Ohio
573:NASA
483:Guam
432:The
382:B-52
351:drag
331:M-21
192:A-12
163:M-21
147:The
141:1971
125:1969
60:Type
35:D-21
3682:995
3677:985
3672:984
3667:981
3662:980
3657:977
3652:949
3647:934
3642:915
3637:901
3632:880
3627:849
3622:840
3617:823
3612:822
3607:785
3602:780
3597:760
3592:749
3587:704
3582:685
3577:680
3572:649
3567:645
3562:622
3557:595
3552:580
3547:549
3542:522
3537:520
3532:500
3527:489
3522:480
3517:475
3512:449
3507:437
3502:422
3497:414
3492:407
3487:402
3472:389
3467:382
3462:380
3457:379
3452:351
3447:349
3442:346
3437:331
3432:330
3427:329
3422:325
3417:322
3412:320
3407:301
3402:300
3397:298
3392:296
3387:295
3382:293
3377:288
3372:286
3367:285
3352:249
3347:246
3342:245
3337:244
3332:222
3327:212
3322:210
3317:207
3312:206
3307:204
3302:200
3297:199
3292:193
3287:189
3282:188
3277:186
3272:185
3267:182
3262:171
3257:170
3252:149
3247:144
3242:141
3237:140
3232:137
3227:136
3222:133
3217:129
3212:122
3207:105
3202:104
3197:100
2890:A/D
2727:XFV
2682:X-7
2590:T2V
2479:U-2
2325:A-9
2237:T2V
2169:R6V
2147:RAF
2122:C-5
2106:P-7
2091:P-3
552:KGB
481:in
207:U-2
4040::
4010:43
4005:42
4000:41
3995:40
3990:39
3985:38
3980:37
3975:36
3970:35
3965:34
3960:33
3950:26
3945:25
3940:24
3935:23
3930:22
3925:21
3920:20
3915:19
3910:18
3905:17
3900:16
3895:15
3885:11
3192:99
3187:94
3182:93
3177:92
3172:91
3167:90
3162:89
3157:88
3152:87
3147:86
3142:85
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