Messerschmitt Me 321

Me 321 Gigant

Messerschmitt Me 321 gliders on airfield 1942
Role	Cargo glider
Manufacturer	Messerschmitt
First flight	25 February 1941
Introduction	1941
Status	retired
Primary user	Luftwaffe
Produced	June 1941 – April 1942
Number built	200
Unit cost	US$ $132,316.89 (adjusted for inflation 2016)
Developed into	Messerschmitt Me 323

The Messerschmitt Me 321 Gigant was a large German cargo glider developed and used during World War II. It was developed into the six-engined Messerschmitt Me 323 Gigant.

Development

During the preparations for a possible invasion of Britain during World War II (Operation Sea Lion) it became obvious to the Luftwaffe's Transport Command that there was a need for a larger capacity cargo- and troop-carrying aircraft than its mainstay, the Junkers Ju 52.^[1]

When the plans for Operation Sea Lion were shelved in December 1940, and planning began for the invasion of Russia (Operation Barbarossa), it was decided that the most cost-effective solution to the need for transport aircraft was to use gliders. Accordingly, the Technical Bureau of the Luftwaffe issued a tender for rapid development of a Grossraumlastensegler ("large-capacity transport glider") to the aircraft manufacturers Junkers and Messerschmitt. The specification called for the glider to be capable of carrying either an 88 mm gun plus its tractor, or a medium tank. The codename Projekt Warschau ("Project Warsaw") was used, with Junkers being given the codename Warschau-Ost and Messerschmitt Warschau-Süd.

However, the Junkers design, the Ju 322 Mammut was unsuccessful due to the company opting to use all-wood construction. Messerschmitt's design for this transport glider consequently secured the contract for the company. Initially given the RLM designation: Me 263; this designation number was later reused (see: RLM) for the second generation rocket fighter developed in 1945: Messerschmitt Me 263. That number was 'freed-up' when the number for this aircraft was switched to: Me 321.

Design

The Me 263 had a framework of steel tubing provided by the Mannesmann company, with wooden spars and a covering of doped fabric. This allowed for quick construction and easy repair when needed and also saved weight. The Me 263 was redesignated the Me 321 and was nicknamed Gigant ("Giant") due to its huge size.

Its nose stood over 6 m (20 ft) high, and was made up of two clamshell doors. The doors could only be opened from the inside, when ramps would be used to allow vehicles to drive in or out. Compared to the Ju 52, the Me 321 offered a load area six times larger, at around 100 m² (1,100 sq ft), and could accommodate a gross cargo weighing up to 23 t (23 long tons). The cargo space had been designed to replicate the load space of a standard German railway flatcar, allowing any cargo that could travel by rail to fit into an Me 321. Alternatively, if used as a passenger transport, 120-130 fully equipped troops could be accommodated.^[2]

The Me 321 was fitted with a jettisonable undercarriage comprising two Bf 109 tailwheels at the front and two Junkers Ju 90 main wheels at the rear and was intended to land on four extendable skids.

The first flight of the prototype Me 321 V1 took place on 25 February 1941, towed into the air by a Ju 90. It was piloted by Messerschmitt test pilot Karl Baur, and carried 3 tonnes (3 tons) of ballast. Baur reported that the controls were heavy and responses sluggish and it was decided to enlarge the cockpit to accommodate a co-pilot and radio operator and dual controls were fitted. Electric servo motors were also fitted to assist in moving the huge trailing edge flaps and further tests caused a braking parachute to also be added.

The test flights were plagued by takeoff difficulties, since the Junkers Ju 90 was not powerful enough, and as an interim measure three Bf 110 heavy fighters were used, in a so-called Troikaschlepp, with the trio of twin-engined fighters taking off together in a V formation. This was a highly dangerous manoeuvre and Ernst Udet asked Ernst Heinkel to come up with a better aerial towing method. Heinkel responded by creating the Heinkel He 111Z Zwilling ("Twins"), which combined two He 111 aircraft through the use of a new "center" wing section with a fifth engine added. Underwing-mount Walter HWK 109-500 Starthilfe rocket-assisted takeoff units were also used to assist takeoff from rough fields.

Operational history

The first Me 321 A-1 production aircraft entered service in May 1941 with Grossraumlastensegler 321 at Leipheim, initially towed by Ju 90s and later by the He 111Z and the Troikaschlepp arrangement of three Bf 110s.^[3] The triple Zerstorer arrangement was very dangerous in the event that one or more of the takeoff booster rockets failed. One such failure did occur in 1941, which led to the collision of the tow-planes and the deaths of all 129 occupants of the four aircraft. This accident was the deadliest in the history of aviation at the time. The death toll would not be matched until the Tachikawa air disaster of 1953 and would not be exceeded until the 1960 New York mid-air collision.^[4] The later Me 321 B-1 variant had a crew of three and was armed with four 7.92 mm (.312 in) MG 15 machine guns.

The Me 321 was less than successful on the Eastern Front for various reasons:

As a glider, the Me 321 lacked the ability to make a second or third approach to a crowded landing strip.
It was impossible to move on the ground without specialized vehicles.
Before the introduction of the He 111 Zwilling, the dangerous Troikaschlepp arrangement gave a one-way range of only 400 km (250 mi) which was insufficient for a safe operating zone.^[5]

In early 1942, the remaining Me 321s were withdrawn from service in Russia in anticipation of the planned Operation Herkules, the invasion of Malta, in which a fleet of the gliders hauled by He 111Zs were to be used. The plan was abandoned due to a lack of towing aircraft.

In 1943, the Me 321s were returned to Russia to be used in a projected operation to relieve General Friedrich Paulus’ besieged army at Stalingrad, but by the time they reached the front line, no suitable airfields remained and they were sent back to Germany.

Following the cancellation of the Stalingrad operation, the Me 321 gliders were mothballed, scrapped, or converted into the powered variant, the Me 323 with six 895 kW (1,200 hp) engines. This was the biggest land-based cargo aircraft of World War II. A further proposed operation — in which the remaining Me 321s would have landed troops on Sicily — was also abandoned, due to a lack of suitable landing sites.

Ultimately, 200 Me 321s were produced.^[6]^[7]

Variants

Me 321 A-1 : single pilot version, 100 built.
Me 321 B-1 : had a crew of three (including co-pilot) and was armed with four 7.92 mm (.312 in) MG 15 machine guns, 100 built.

Specifications (Me 321B)

Data from German Aircraft of the Second World War

General characteristics

Crew: three
Capacity: 130 troops
Length: 28.15 m (92 ft 4 in)
Wingspan: 55 m (180 ft 5 in)
Height: 10.15 m (33 ft 4 in)
Wing area: 300 m² (3,228 sq ft)
Empty weight: 12,400 kg (27,300 lb)
Loaded weight: 34,400 kg (75,800 lb)

Performance

Maximum speed: 160 km/h on tow (100 mph)
Rate of climb: 2.5 m/s towed by three Bf 110 aircraft (490 ft/min)

Armament

Guns: 4 × 7.92 mm (.312 in) MG 15 machine guns

References

Notes

↑ Zabecki 1999, p. 992.
↑ Staerck, Sinnott and Gill 2002, pp. 202–203.
↑ Staerck, Sinnott and Gill 2002, p. 202.
↑ http://www.fiddlersgreen.net/models/aircraft/Messerschmitt-Me321.html
↑ Hyland and Gill 1999, p. 83.
↑ Green 1979, p. 648.
↑ Smith and Kay 1978, p. 557.

Bibliography

Dabrowski, Hans-Peter. Messerschmitt Me 321/323: The Luftwaffe's "Giants" in World War II. Atglen, PA: Schiffer Military History, 2001. ISBN 0-7643-1442-4.
Green, William. Warplanes of the Third Reich. London: Macdonald and Jane's (Publishers) Ltd., 1970 (4th imp. 1979). ISBN 0-356-02382-6.
Hyland, Gary and Anton Gill. Last Talons of the Eagle: Secret Nazi Technology Which Could Have Changed the Course of World War II. Toronto, Ontario, Canada: McArthur & Company, 1999. ISBN 0-7472-5964-X.
Mondey, David. The Concise Guide to Axis Aircraft of World War II. New York: Bounty Books, 1996. ISBN 1-85152-966-7.
Smith, J.R. and Anthony L. Kay. German Aircraft of the Second World War. London: Putnam and Company Ltd., 1972 3rd imp. 1978). ISBN 0-370-00024-2.
Staerck, Christopher, Paul Sinnott and Anton Gill. Luftwaffe: The Allied Intelligence Files. London: Brassey's, 2002. ISBN 1-57488-387-9.
Zabecki, David T. World War II in Europe. Taylor & Francis, 1999. ISBN 0-8240-7029-1.

External links

Wikimedia Commons has media related to Messerschmitt Me 321.

WaffenHQ.de Pictures and description (German)Broken link
Archive video with Me 321 being towed (comment in English)

Messerschmitt aircraft

Company designations	M 17 M 18 M 19 M 20 M 21 M 22 M 23 M 24 M 25 M 26 M 27 M 28 M 29 M 30 M 31 M 33 M 35 M 36 M 37

RLM designations 1933–45	Bf 108 Bf 109 Bf 109TL Bf 110 Me 155 Bf 161 Bf 162 Bf 163 Me 163 Bf 165 Me 209 Me 210 Me 261 Me 262 Me 263 Me 264 Me 265 Me 309 Me 310 Me 321 Me 323 Me 328 Me 329 Me 334 Me 409 Me 410 Me 509 Me 609

Experimental designations	P 08.01 P.1070 P.1073 P.1075 P.1079 P.1092 P.1095 P.1099 P.1100 P.1101 P.1102 P.1103 P.1104 P.1106 P.1107 P.1108 P.1109 P.1110 P.1111 P.1112

USAAC designations	C-44

Reich Air Ministry aircraft designations

1 to 100	B 9 Gö 9 Do 10 Do 11 Wn 11 Do 12 Do 13 Do 14 Do 15 Wn 15 Do 16 Wn 16 Do 17 Do 18 Do 19 Do 20 Do 22 Do 23 Do 24 Kl 25 Do 26 Kl 26 M 27 Do 29 Kl 31 Kl 32 W 33 L 33 W 34 Kl 35 Kl 36 HD 37 HD 38 G 38 DFS 39 BV 40 DFS 40 A 40 Fw 42 He 42 Fw 43 HD 43 Fw 44 He 45 He 46 Ju 46 Fw 47 Ju 47 K 47 A 48 He 49 Ju 49 He 50 A 50 He 51 K 51 Ju 52 K 53 NR 54 Fw 55 NR 55 Fw 56 Fw 57 Fw 58 He 58 He 59 He 60 Ju 60 Fw 61 He 61 Fw 62 He 62 He 63 Ar 64 He 64 Ar 65 He 65 Ar 66 He 66 Ar 67 Ar 68 Ar 69 He 70 He 71 He 72 He 74 Ar 76 Ar 77 Ar 79 Ar 80 Ar 81 Ju 85 Ju 86 Ju 87 Ju 88 Ju 89 Ju 90 Ar 95 Ar 96 Fi 97 Fi 98 Fi 99 He 100

101 to 200	Al 101 Al 102 Al 103 Fi 103 Fh 104 Kl 105 Kl 106 Kl 107 Bf 108 Bf 109 Bf 110 He 111 He 112 He 113 He 114 He 115 He 116 Hs 117 He 118 He 119 He 120 Hs 121 Hs 122 Hs 123 Hs 124 Hs 125 Hs 126 Hs 127 Hs 128 Hs 129 Hs 130 Bü 131 Hs 132 Bü 133 Bü 134 Ha 135 Ha 136 Hü 136 Ha 137 BV 138 Ha 139 Ha 140 BV 141 BV 142 BV 143 BV 144 Go 145 Go 146 Go 147 Ju 147 Go 149 Go 150 Kl 151 Ta 152 Kl 152 Ta 153 Ta 154 BV 155 Fi 156 Fi 157 Fi 158 Fw 159 Ju 160 Bf 161 He 162 Bf 162 Bf 163 Me 163 Me 164 Fi 166 FK 166 Fi 167 Fi 168 He 170 He 172 He 176 He 177 He 178 Bü 180 Bü 181 Bü 182 Ta 183 Fl 184 Fl 185 Fw 186 Ju 186 Fw 187 Ju 187 Ju 188 Fw 189 Fw 190 Fw 191 Ao 192 DFS 193 DFS 194 Ar 195 Ar 196 Ar 197 Ar 198 Ar 199 Fw 200

201 to 300	Si 201 Si 202 DFS 203 Si 204 Fw 206 Me 208 Me 209 Me 209 (1943) Me 210 Hü 211 Do 212 Do 214 Do 215 Do 216 Do 217 Hs 217 He 219 He 220 BV 222 Fa 223 Fa 224 Ao 225 Fa 225 BV 226 Ho 226 FGP 227 DFS 228 Ho 229 DFS 230 Ar 231 Ar 232 Ar 233 Ar 234 Do 235 BV 237 BV 238 Fw 238 Ar 239 Ar 240 Go 241 Go 242 Go 244 BV 246 Ju 248 BV 250 Fw 250 Ho 250 Ho 251 Ho 252 Ju 252 Fi 253 Ho 253 Ta 254 Ho 254 Fi 256 Sk 257 Fw 261 Me 261 Me 262 Me 263 Me 264 Fl 265 Me 265 Fa 266 Ho 267 Ju 268 Fa 269 He 270 We 271 Fw 272 He 274 He 275 He 277 He 278 He 280 Fl 282 Fa 283 Ta 283 Fa 284 Fl 285 Ju 286 Ju 287 Ju 288 Ju 290 Me 290 As 292 Hs 293 Hs 294 Hs 295 Ar 296 Hs 296 Hs 297 Hs 298 Fw 300

301-	Me 309 Me 310 Do 317 Do 318 He 319 Me 321 Ju 322 Me 323 Me 328 Me 329 Fa 330 DFS 331 DFS 332 Fi 333 Me 334 Do 335 Fa 336 Fl 339 E.340 WNF 342 He 343 Rk 344 So 344 Go 345 DFS 346 Rk 347 Ba 349 Ju 352 Me 362 Me 364 Ju 388 Ju 390 Fw 391 Ar 396 Ta 400 Me 409 Me 410 Do 417 He 419 ZMe 423 Ar 430 Ka 430 Ar 432 Do 435 Ar 440 Ju 452 Me 462 Ju 488 Fw 491 Me 509 Me 510 He 519 ZSO 523 Ar 532 Do 535 E.555 Me 609 Ar 632 Do 635

This article is issued from Wikipedia - version of the Thursday, May 05, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.