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No. 1321 Flight
Vickers Valiant B.1 WP201, of No. 1321 Flight RAF.
Active	1 Sep 1944 – 1 Nov 1944 3 Aug 1954 – 15 Mar 1956 1 Oct 1957 – 31 Mar 1958
Country	United Kingdom
Branch	Royal Air Force
Role	Fighter affiliation Nuclear Weapons trials Electronic countermeasures (ECM)
Aircraft flown
Bomber	Vickers Valiant B.1 Avro Lincoln B.2 English Electric Canberra B.2
Fighter	Hawker Hurricane Mk.IIc

No. 1321 Bomber (Defence) Training Flight RAF was first formed at RAF Bottesford on 1 September 1944 as a fighter affiliation unit to train bomber crews from No. 5 Group Bomber Command how to defend their aircraft. The Flight was disbanded two months later on 1 November 1944 and absorbed by the units they trained before, 1668 Heavy Conversion Unit and 1669 Heavy Conversion Unit.

No. 1321 (Valiant/Blue Danube Trials) Flight RAF was reformed at RAF Wittering on 3 August 1954 as a Vickers Valiant unit to integrate the Blue Danube nuclear weapon into Royal Air Force service. It was commanded by Squadron Leader D. Roberts, formerly commanding officer of No. 617 Squadron. Squadron Leader Roberts had earlier reported to Wisley Airfield, the Vickers-Armstrongs flight test airfield in Surrey, expecting to take a three-week conversion course to the Valiant. Instead he remained there for 15 months until he reported to Wittering to command 1321 Flight. 1321 Flight's first aircraft was Valiant WP201. Roberts and his crew flew it from Wisley to Wittering on 15 June 1955 to begin an intensive program of integration tests. The tests had two main separate components:

1. Ballistic performance of the bomb casing at various altitudes and speeds
2. Testing of the equipment from the Atomic Weapons Research Establishment under operational conditions

A variety of BTV (Ballistic Test Vehicle) drops were carried out at various heights and speeds at the experimental Bombing Range on Orfordness. The ballistic performance of the weapon was found to be so good that there was a risk of it not leaving the slipstream of the bomber and consequently flying along with the aircraft. Retractable spoilers were fitted to the underside of the fuselage, just forward of the bomb bay in order to induce turbulence within the bomb bay enabling the bomb to fall away. All the live nuclear weapons dropped at Maralinga (Australia) and Christmas Island (Pacific Ocean) were assembled, pre-drop tested and loaded on to specially prepared Valiant bombers of 49 Squadron and 138 Squadron by the small team of technical specialists from 1321 Flight. The life of 1321 (Valiant/Blue Danube Trials) Flight came to an end on 15 March 1956 when it became 'C' Flight of No. 138 Squadron, the first regular Valiant unit.

The flight was reformed, once again, by the merger of the Avro Lincoln element of 199 Squadron, called Arrow Squadron and Antler Squadron, to become No. 1321 (ECM) Flight RAF at RAF Hemswell on 1 October 1957, disbanding on 31 March 1958 and absorbed by the Bomber Command Bombing School.

Aircraft operated

Flight bases

See also

• List of Royal Air Force independent flights

References

Notes

1. ^ Lake 1999, p. 85.
2. ^ Sturtivant and Hamlin 2007, p. 119.

Bibliography

• Delve, Ken. The Source Book of the RAF. Shrewsbury, Shropshire, UK: Airlife Publishing, 1994. ISBN 1-85310-451-5.
• Lake, Alan. Flying Units of the RAF. Shrewsbury, Shropshire, UK: Airlife Publishing, 1999. ISBN 1-84037-086-6.
• Sturtivant, Ray, ISO and John Hamlin. RAF Flying Training And Support Units since 1912. Tonbridge, Kent, UK: Air-Britain (Historians) Ltd., 2007. ISBN 0-85130-365-X.

v t e Royal Air Force flying squadrons
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inactive	5 15 21 26 34 35 36 37 38 39 40 43 44 46 47 48 49 50 52 53 55 58 59 61 62 63 64 65 66 67 68 69 71 73 74 75 76 77 79 81 82 83 85 86 87 88 89 90 91 93 94 95 96 97 98 100 102 103 104 105 106 107 108 109 110 111 112 113 114 116 117 118 119 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 203 204 205 208 209 210 211 212 213 214 215 217 218 219 220 221 222 223 224 225 226 227 228 229 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 353 354 355 356 357 358 360 361 510 511 512 513 514 515 516 517 518 519 520 521 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 547 548 549 550 567 569 570 571 575 576 577 578 582 586 587 595 597 598 618 619 620 621 623 624 625 626 627 628 629 630 631 635 639 640 644 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 679 680 681 682 683 684 691 692 695
Australian Flying Corps units attached to the RAF during the First World War	67 (1 Sqn AFC) 68 (2 Sqn AFC) 69 (3 Sqn AFC) 71 (4 Sqn AFC)
Article XV (Commonwealth) air force units attached to the RAF during the Second World War	Royal Canadian Air Force (RCAF) 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 Royal Australian Air Force (RAAF) 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 466 467 Royal New Zealand Air Force (RNZAF) 485 486 487 488 489 490
squadrons formed from non-Commonwealth personnel during the Second World War	Argentine 164 Belgian 349 350 Czechoslovak 310 311 312 313 Dutch 320 (Netherlands) 321 (Netherlands) 322 (Dutch) French 326 327 328 329 340 341 342 343 344 345 346 347 Greek 13 335 336 Norwegian 330 331 332 333 334 Polish 300 301 302 303 304 305 306 307 308 309 315 316 317 318 663 United States 71 121 133 Yugoslav 351 352
Royal Auxiliary Air Force	Special Reserve 500 501 502 503 504 Auxiliary Air Force 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 622
Fleet Air Arm of the RAF (1924–1939)	712 715 718 800 801 802 803 810 811 812 813 814 820 821 822 823 824 825
Volunteer Gliding Squadrons (VGS)	current 611 615 621 622 626 631 632 637 644 645 661 former 612 613 614 616 617 618 623 624 625 633 634 635 636 642 643 662 663 664

• Royal Air Force independent flights
• Military units and formations established in 1944