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Hawker Siddeley Nimrod R1

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141: 451: 39: 500: 153: 420: 268:, the home base of 51 Squadron. The first aircraft was delivered in July 1971, and was eventually completed more than two years later, making its first training flight in 21 October 1973, before being formally accepted into service in May 1974. The acceptance of the two remaining aircraft in late 1974 allowed for the withdrawal of the Comets and supporting 377:. In 2009, with the plan for the Rivet Joint making progress, one of 51 Squadron's three Nimrods was withdrawn from service to be used as a spares source for the remaining two. The purchase of three RC-135 aircraft was confirmed in March 2010, with the Nimrod intended to be withdrawn immediately. This was postponed due to the requirement for SIGINT during 408:. Details of this were not confirmed, but believed to feature new search receivers; a wideband, digital direction-finder; a cluster of digital intercept receivers; and in-flight analysis equipment, including a recording and playback suite, multi-channel digital data demodulator, and pulsed signal processing. 297:, transmit the information directly to ground commanders. The main peacetime use of the Nimrod was largely similar; the ability of the Nimrod to make a high speed transit to its operational area, and then loiter for an extended period, meant that missions would usually involve sitting off the edge of the 400:
The exact nature of the aircraft's intelligence gathering equipment was highly classified, with very little detail released. The first time that the interior of the aircraft was permitted to be photographed was upon its withdrawal from service in 2011. At this point, it was revealed that the aircraft
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Almost as soon as the aircraft entered service, attention was placed on working on the specifications for a replacement aircraft, as it was envisaged that the Comet would reach the end of its useful life by the early 1970s. The decision to proceed with a new SIGINT aircraft was taken in 1964 by the
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In 1969, a total of three Nimrods were ordered for conversion to SIGINT aircraft, which were designated as R1 to differentiate them from the MR1 maritime reconnaissance version. Three airframes were constructed as part of the overall Nimrod production line before being delivered to the RAF with no
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London Signals Intelligence Committee, which determined that the usefulness of retaining an airborne intelligence gathering capability justified the significant cost of replacing the Comet. In comparing the cost of potential aircraft to undertake this role, including a variant of the
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Although the Nimrod option was identified as the cheapest, the cost of procuring and modifying three aircraft was still estimated at £14m, a significant proportion of the budget for SIGINT operations. As a consequence of this, in 1967,
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The Nimrod R1 fleet, owing to its significantly reduced level of usage compared to the MR2, was originally intended to remain in service for an extended period into the 2010s, with a major systems upgrade codenamed
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The secrecy of the Nimrod's intended missions led to them being described as "radar calibration" aircraft from their entry into service. The major rationale for the Nimrod in a war situation, as provided by
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on the front of the external wing fuel tanks and on the tailcone. The bulk of the aircraft's detection equipment was installed in the weapons bay, with a total crew of 25, plus five flight crew.
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equipment fitted. This was owing to the highly secret nature of the equipment intended for use on the aircraft - instead, they were fitted out at
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The Nimrod R1 was primarily based around the standard Nimrod MR1 airframe, with the only significant visual differences being the absence of the
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assets. The aircraft undertook its mission in various post-Cold War operations, including the Former Yugoslavia, Iraq and Afghanistan.
240:), the cheapest option was decided to be a variant of the Nimrod maritime patrol aircraft then in development for the Royal Air Force. 249: 38: 1770: 1689: 1180: 476: 862: 1643: 338:. Following this, a decision was taken to replace the aircraft. In 1992, four Nimrod MR2 aircraft had been stored as part of the 1506: 484: 308:, the RAF became more open about the role of 51 Squadron and the Nimrod R1, particularly when the unit moved from RAF Wyton to 1070: 1379: 1332: 1780: 1733: 1591: 1304: 1258: 664: 1044: 1243: 1457: 1374: 1278: 293:, collecting intelligence and, with the use of on-board operators with ground experience and knowledge of the enemy 289:, which, it was expected, would be overrun. The intention was for the Nimrod to fly approximately 50 miles from the 1248: 1201: 499: 1665: 1175:
Aldrich, Richard. "GCHQ: The Uncensored Story of Britain's Most Secret Intelligence Agency". Harper Press, 2010.
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had a total of 13 side-facing consoles along the length of the main cabin, with three forward facing consoles.
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In the 1990s, the Nimrod R1 fleet began to be fitted with a major systems package upgrade called
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aircraft, converted for use in the signals intelligence (SIGINT) gathering role, to replace the
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defence review. One of these was selected for conversion to an R1, under a project code-named
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Of the four Nimrod R1s constructed in total, two have survived and are on public display:
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aircraft being used in the role. At the same time, the squadron was renumbered as
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receiving and recording signals, which would subsequently be analysed by GCHQ.
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Of the remaining two, the nose of XW665 was transported for display to the
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4,501–5,001 nmi (5,180–5,755 mi, 8,336–9,262 km)
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boom projection from the aircraft's tail, and the presence of
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Jackson, Paul (1998). "Anneka achieves the 'impossible'".
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On 16 May 1995, on a test following a major service at
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Delco AN/ASN-119 Carousel Inertial Navigation System
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engines, 12,160 lbf (54.1 kN) thrust each
168:(reconnaissance) aircraft formerly operated by the 128: 120: 112: 104: 99: 91: 83: 71: 63: 53: 48: 31: 172:. The aircraft was a conversion of the existing 1058:. 28 September 2012. Retrieved 13 October 2012. 1543: 1202: 856: 854: 483:, while the salvaged nose of XW666 is at the 8: 982:"Nimrod R1 aircraft in final flight for RAF" 919:. Fairford: Royal Air Force Benevolent Fund. 826: 824: 822: 820: 776: 774: 747: 745: 743: 741: 739: 737: 659: 657: 1611: 1550: 1536: 1528: 1209: 1195: 1187: 28: 910: 908: 596:426 kn (490 mph, 789 km/h) 590:500 kn (580 mph, 930 km/h) 1147:"The Incomplete Guide to Airfoil Usage" 653: 326:1995 Royal Air Force Nimrod R1 ditching 1661:United Arab Airlines Flight 869 (1963) 1656:United Arab Airlines Flight 869 (1962) 535:114 ft 10 in (35.00 m) 7: 529:118 ft 0 in (35.97 m) 454:XV249 at RAF Museum Cosford in 2015 1776:United Kingdom defence procurement 541:29 ft 9 in (9.07 m) 25: 503:A pair of Nimrod R1s in formation 1650:Aerolíneas Argentinas Flight 322 1644:South African Airways Flight 201 861:Stevens, Philip (28 June 2011). 418: 373:, under a new project codenamed 37: 1796:1970s British military aircraft 1120:South Yorkshire Aircraft Museum 1045:"Nimrod R.1 unveiled at Museum" 485:South Yorkshire Aircraft Museum 236:had at the time ordered as the 1056:Royal Air Force Museum Cosford 608:44,000 ft (13,000 m) 312:, co-locating the bulk of its 1: 156:The salvaged cockpit of XW666 1791:Aircraft first flown in 1973 1480:Development/concept aircraft 1080:, Retrieved 19 January 2017. 1279:Global Combat Air Programme 755:. Spyflight. Archived from 695:"de Havilland Comet R Mk 2" 291:forward edge of battle area 208:took delivery of a pair of 1812: 323: 299:Soviet sphere of influence 1666:Cyprus Airways Flight 284 956:"RAF Rivet Joint Arrival" 888:"Nimrod R1P, 16 May 1995" 477:Auto & Technik Museum 304:Following the end of the 254:nuclear weapons programme 162:Hawker Siddeley Nimrod R1 36: 1771:Hawker Siddeley aircraft 177:maritime patrol aircraft 1288:Patrol and surveillance 1151:m-selig.ae.illinois.edu 1050:3 November 2020 at the 892:Aviation Safety Network 795:airforce-technology.com 514:General characteristics 1752:Sud Aviation Caravelle 1078:East Midlands Aeropark 935:Defense Industry Daily 504: 470:East Midlands Aeropark 455: 157: 149: 144:Nimrod R1 alongside a 133:Hawker Siddeley Nimrod 1690:RAF Nimrod MR.2 XV230 1684:RAF Nimrod MR.2 XV239 1458:Combat drones (UCAVs) 1035:July 2001, pp. 30–31. 502: 453: 155: 143: 1781:Signals intelligence 1678:RAF Nimrod R.1 XW666 1068:"Aeropark Exhibits." 848:Aldrich 2010, p. 271 830:Aldrich 2010, p. 270 814:Aldrich 2010, p. 269 780:Aldrich 2010, p. 268 166:signals intelligence 58:Signals intelligence 1672:Dan-Air Flight 1903 1126:on 15 December 2018 1091:"Sinsheim, Germany" 1073:12 May 2017 at the 839:Simons 2013, p. 275 446:Aircraft on display 49:General information 1729:Ronald Eric Bishop 1714:Seymour Collection 1012:On Target Aviation 962:. 12 November 2013 753:"BAe Nimrod R Mk1" 505: 464:RAF Museum Cosford 456: 371:RC-135 Rivet Joint 340:Options for Change 258:RAF Strike Command 158: 150: 1758: 1757: 1699: 1698: 1525: 1524: 1218:British Aerospace 1145:Lednicer, David. 1033:Air International 867:Air Forces Review 250:Cabinet Secretary 218:Boeing Washington 189:search and rescue 185:anti-ship warfare 138: 137: 105:Introduction date 43:Nimrod R1 landing 16:(Redirected from 1803: 1747:related aircraft 1739:Tony Fairbrother 1612: 1552: 1545: 1538: 1529: 1295:Nimrod MR1 / MR2 1211: 1204: 1197: 1188: 1162: 1161: 1159: 1157: 1142: 1136: 1135: 1133: 1131: 1122:. 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Spyflight 665:"Nimrod R1" 626:E.290 Radar 581:Performance 566:Powerplant: 438:51 Squadron 360:Replacement 336:Moray Firth 332:RAF Kinloss 246:Burke Trend 232:(which the 222:51 Squadron 146:Sentry AEW1 1765:Categories 1704:In fiction 1448:Skylynx II 1443:Silver Fox 1390:One-Eleven 1347:transports 1244:Harrier II 643:References 634:Starwindow 632:SRIM 6113 406:Starwindow 276:Operations 230:Boeing 707 200:Background 1709:Operators 1619:incidents 1615:accidents 1408:Ampersand 1343:Airliners 1300:Nimrod R1 533:Wingspan: 508:Data from 489:Doncaster 412:Operators 375:Airseeker 270:Canberras 266:RAF Wyton 204:In 1958, 124:June 2011 32:Nimrod R1 18:Nimrod R1 1786:Quadjets 1570:variants 1507:P.1233-1 1370:Concorde 1320:Trainers 1249:Hawk 200 1224:aircraft 1156:16 April 1071:Archived 1048:Archived 1008:"Nimrod" 986:BBC News 614:Avionics 573:turbofan 481:Sinsheim 468:XW664 – 462:XV249 – 320:Ditching 306:Cold War 210:Comet R2 108:May 1974 1517:Tempest 1512:Replica 1471:Taranis 1438:Phoenix 1365:BAe 146 1360:BAe 125 1333:Goshawk 1274:Typhoon 1264:Tornado 1239:Harrier 1130:24 July 1100:24 July 1017:22 July 992:24 July 966:24 July 940:24 July 897:23 July 872:23 July 800:22 July 763:21 July 726:22 July 701:22 July 679:21 July 546:Airfoil 539:Height: 527:Length: 395:radomes 350:series 195:History 121:Retired 100:History 87:Retired 1692:(2006) 1686:(1995) 1680:(1995) 1674:(1970) 1668:(1967) 1652:(1961) 1646:(1954) 1640:(1954) 1634:(1953) 1628:(1952) 1608:topics 1582:Nimrod 1564:family 1502:P.1216 1433:Mantis 1254:Jaguar 1179:  600:Range: 423:  385:Design 287:Berlin 248:, the 238:RC-135 187:, and 174:Nimrod 84:Status 1597:MRA.4 1592:AEW.3 1577:Comet 1562:Comet 1497:P.125 1428:HERTI 1418:Demon 1413:Corax 1031:Lake 648:Notes 551:root: 521:Crew: 314:ISTAR 164:is a 1487:ATSF 1466:Fury 1423:GA22 1328:Hawk 1220:and 1177:ISBN 1158:2019 1132:2017 1102:2017 1019:2017 994:2017 968:2017 942:2017 899:2017 874:2017 802:2017 765:2017 728:2017 703:2017 681:2017 624:EKCO 568:4 × 558:tip: 283:GCHQ 234:USAF 216:and 183:and 160:The 54:Role 1617:and 1587:R.1 1492:EAP 1355:ATP 721:RAF 669:RAF 487:in 479:in 391:MAD 348:BBC 1767:: 1149:. 1118:. 1093:. 1054:. 1010:. 984:. 958:. 933:. 907:^ 890:. 865:. 853:^ 819:^ 793:. 773:^ 736:^ 719:. 667:. 656:^ 556:; 523:29 491:. 272:. 224:. 1551:e 1544:t 1537:v 1345:/ 1210:e 1203:t 1196:v 1160:. 1134:. 1104:. 1021:. 996:. 970:. 944:. 901:. 876:. 804:. 767:. 730:. 705:. 683:. 548:: 95:4 20:)

Index

Nimrod R1

Signals intelligence
Manufacturer
Hawker Siddeley
Hawker Siddeley Nimrod

Sentry AEW1

signals intelligence
Royal Air Force
Nimrod
maritime patrol aircraft
anti-submarine
anti-ship warfare
search and rescue
192 Squadron
Comet R2
Avro Lincoln
Boeing Washington
51 Squadron
Boeing 707
USAF
RC-135
Burke Trend
Cabinet Secretary
nuclear weapons programme
RAF Strike Command
RAF Wyton
Canberras

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