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Thread: U-Boote Typ XX1

  1. #16
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    IX-A
    (1938) Tauchboot für ozeanische Verwendung (Ocean Diveboat)
    Developed from WW I, U 81, the type IX was a German attempt for a large, long distance U-boat. Due to its size and look, the IX's were soon nick-named "Seekuh" (Sea Cow).
    The interior was not as cramped as in earlier types but as it was a long distance boat it often carried more provisions, filling the gained space
    The design showed not to be as successful as the VII's though.
    This was a large boat in need of more time and space to manouver, dive, etc. Ad in rough sea or at high speed, the tower took more water, giving anyone there frequent, salty showers.
    8 were built: U 37 - U 44.



    IX-B
    (1939) Improved version of IX A. ie more fuel.
    14 were built: U 64 - U 65, U 103 - U 111 and U 122 - U 124.



    IX-C
    (1940) A further improved version of the IX A and IX B. ie more fuel.
    The largest number of produced boats of the type IX's.
    143 were built: U 66 - U 68, U 125 - U 131, U 153 - U 176,
    U 183 - U 194, U 501 - U 550, U 801 - U 806, U 841 - U 846,
    U 853 - U 858, U 865 - U 870, U 877 - U 881, U 889 - U 891
    and U 1221 - U 1235.



    IX-C/40
    (1942) Sightly modified version of IX C
    According to "U-boats under the Swastika" 85 were built:
    U 167 - U 170, U 183 - U 194, U 525 - U 550, U 801 - U 806,
    U 841 - U 846, U 853 - U 858, U 865 - U 870, U 877 - U 881
    and U 1221 - U 1235.



    IX-D1
    (1941) A hard to manouver, modified version, based on earlier versions of type IX's. This was an even larger boat and was nick-named "überseekuh". Originally designed and built for cargo transports the IX D1 had no torpedo tubes!
    2 were built: U 180 and U 195 (but after refit, same as IX D2)



    IX-D2
    (1941) As large and clumsy as IX D1-freighter, the IX D2 was the fighting version. Because of their size, their need for extra time to maneuver and dive, these boats were defenately unsuitable for action in the Atlantic and meant for service in the Indian Ocean, The Pacific and other distant waters.
    8 were built: U 177 - U 182, U 196 - U 200, U 847 - U 852,
    U 859 - U 864, U 871 - U 876 and U 883 - U 884.

  2. #17
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    X-A
    (1938)
    “Never Built” Minen-Uschiff für ozeanische Verwendung (Ocean Mine U-boat)
    A large double hulled U-cruiser designed in 1938.
    Project was abandoned and switched to X B. A 1937 design for a ocean-going minelayer U-boats. 4 mine-shafts like the XB with additional dry storage for mines and two mine launching tubes in the stern for SMA mines. 4 torpedo tubes at the bow below the CWL. One 105mm/45 deck gun. No contracts granted for these boats. “Never Built”



    X-B
    (1941) Minen-Uschiff für ozeanische Verwendung (Ocean Mine U-boat)
    This large mine-layer was developed from type I A and plans for type X A. It was quite easy to identify as it had a raised section on front deck.
    The X B could carry over sixty mines! Eighteen in six bow shafts and the rest in side shafts.
    Besides laying mines, this type also were used as supply vessel.
    8 were built: U 116 - U 119, U 219 - U 220 and U 233 - U 234.



    XI
    (1937)
    “Never Built” U-Kreuzer (Tauchkreuzer) (Sub-Cruiser) A huge, double hull submarine cruiser designed before the war (1937-1938) but halted and cancelled in fall/autumn of 1939. Huge U-boats, designed in 1937-1938, with 4 127mm deck guns in two gun-towers (one fore and aft of the conning tower).

    6 torpedo tubes (4 in the bow and two at the stern, all below the CWL). One Ar 231 small aircraft in a watertight 2.6m in diameter container shaft. These boats were to have a crew of about 110 men almost double that of any constructed German U-boat. 4 contracts (U-112 thru U-115) were awarded to the AG Weser yard in Bremen on Jan 17, 1939 but wisely cancelled at the outbreak of war in September that year and none of the boats had been laid down at the time (some sources mention U-112 as being laid down but that does not make sense).

    These boats are often claimed to not only have been completed but sailed, usually on very clandestine missions and for good measure words like SS, Hitler, Bormann and the like are thrown into the mix. None of this is true and they very certainly not black as some suggest as it is somewhat hard to paint something that does not exist black. “Never Built”



    XII
    (19??)
    “Never Built” U-Schiff-Projekt (Flotten-Uboot) (Fleet sub)
    A fleet U-boat design from 1938. 8 torpedo tubes, 6 at the bow and 2 at the stern, all below the CWL. This boat was to carry 20 torpedoes and no mines. The gun armament was to be the same as for the type IX boats. No contracts granted for these boats. The type XII was to be able to carry twenty torpedoes! “Never Built”



    XIII
    (1939)
    “Never Built” Kleines Uboot, nur Projekt (small U-boat only project)
    Designed in 1939, this was a further development of the type II coastal U-boat types, with 4 torpedo tubes, all at the bow and below the CWL, one 2cm AA gun. No contracts granted for these boats. “Never Built”



    XIV
    (1941) Versorgungs-Uschiffe für ozeanische Öltransporte (Maintenance ocean subship)
    Early nick-named "Milchkuh" (Milk Cow) these large and thick boats were designed to depart for the Atlantic, get in position, and serve as supply ships for fighting U-boats.
    The XIV's carried fuel, ammunition, torpedoes and provisions to enable the operative boats operate for longer periods and/or further away from their home bases.
    All of these boats were found and sunk by the allies! The type XIV was an easy prey as spotted by an aircraft they had no ability to dive and escape fast enough.
    10 were built: U 459 - U 464 and U 487 - U 490.



    XIV-B
    (19??)
    “Never Built” Project for another, larger Milk Cow.
    “Never Built”



    XV
    (19??)
    “Never Built” A preliminary design for very large (5000-ton and 3000-ton respectively) for transport and repair boats who would carry torpedoes, food and oil as cargo. The engine layout was to be the same as for the VIIC. No contracts granted for these boats.
    The XVs was to be equipped with a workshop to repair operational U-boats!
    LOOK AT IV



    XVI
    (19??)
    “Never Built” Another large design for a transport and repair boat type that was to carry supplies to the front boats in distant parts of the ocean.
    The XVI's was to be equipped with a workshop to repair operational U-boats! “Never Built”

  3. #18
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    XVII-A
    (V 300)
    (1942)
    “Never Built” Versuchs-Uboot (Test sub)
    Contracted to be built during 1942 by Germania Werft.
    Cancelled in 1944 before the boat (U 791) was completed.
    “Never Built”



    XVII-A
    (V 300 II)
    (19??)
    “Never Built” Versuchs-Uboot (Test sub)
    A further developed version of the XVII A (v 300). “Never Built”



    XVII-A
    (V 300 III)
    (19??)
    “Never Built” Versuchs-Uboot (Test sub)
    The final version of the XVII A (v 300).
    Production halted in favour of XVII A (wa 201).



    XVII-A
    (Wa 201)
    (1943)
    Versuchs-Uboot (Test sub) 2 Built U792 & U793
    Experimental boat. Designed by Professor Walter, Germania- and Blohm und Voss Werft.

    U-792. Type XVIIA. Launched on 28 Sep, 1943 and commissioned on 16 Nov, 1943. Fate: Used for trials. Scuttled at 0130hrs on 4 May, 1945 in position 54.19N, 09.43E in the Audorfer See, near Rendsburg.

    U-793. Type XVIIA. Launched on 4 Mar, 1944 and commissioned on 24 Apr, 1944. Fate: Scuttled at 0130hrs on 4 May, 1945 in position 54.19N, 09.43E in the Audorfer See, near Rendsburg.



    XVII-A
    (Wa 202)
    (1943) Versuchs-Uboot (Test sub) 2 Built: U 794 and U 795.
    Experimental boat. Designed by Professor Walter, Germania- and Blohm und Voss Werft.

    U-794. Type XVIIA. Launched on 7 Oct, 1943 and commissioned on 14 Nov, 1943. Fate: Used for trials and scuttled on May 5, 1945 in Gelting Bay. Later raised and broken up.

    U-795. Type XVIIA. Launched on 21 Mar, 1944 and commissioned on 22 Apr, 1944. Fate: Used for trials and scuttled on May 3, 1945 at Germaniawerft in Kiel. Later broken up.



    XVII-B
    (1944) Versuchs-Uboot (Test sub) Small Coastal Research vessels
    Double hull experiment designed by Ingenieurbüro Glückauf 1941-1942.
    Totally 12 were contracted (U 1405 - U 1416) 3 were built: (U 1405 - U 1407).

    U-1405. Type XVIIB. Launched on 1 Dec, 1944 and commissioned on 21 Dec, 1944. Fate: Scuttled on 5 May, 1945 in Eckernfjörde Bay. Later broken up.

    U-1406. Type XVIIB. Launched on 2 Jan, 1945 and commissioned on 8 Feb, 1945. Fate: Scuttled on 5 May, 1945 at Cuxhaven. Later raised and transported to the USA on the deck of the US transport vessel Shoemaker on 15 Sep, 1945. She was used for trials by the US Navy and broken up in New York harbor sometime after 18 May, 1948.

    U-1407. Type XVIIB. Launched on , 0000 and commissioned on 13 Mar, 1945. Fate: Scuttled 5 May, 1945 at Cuxhaven.

    U-1408 through U-1410 (3 boats) were under construction at Blohm & Voss in Hamburg from 1943 but were not complete when the war ended.
    U-1411 through U-1416 (6 boats) Under construction at Blohm & Voss in Hamburg (Werk # 260-266) but were cancelled on 20 Sept, 1943 in favour of the XXI.



    XVII-B2
    (19??)
    “Never Built” Versuchs-Uboot (Test sub)
    Projected improvements of the XVII B. “Never Built”



    XVII-B3
    (19??)
    “Never Built” Versuchs-Uboot (Test sub)
    Projected improvements of the XVII B.



    XVII-G
    (1941)
    “Never Built” Versuchs-Uboot (Test sub)
    Designed by Ingenieurbüro Glückauf 1941-1942.
    Cancelled. “Never Built”



    XVII-G2
    (19??)
    “Never Built” Versuchs-Uboot (Test sub)
    Projected improvements of the XVII G.
    “Never Built”



    XVII-K
    (1945)
    “Never Completed” Versuchs-Uboot (Test sub)
    Launched in February 1945 (but not completed), this experimental boat (U 798) obtained its oxygen from the water(!)(Ingolin)

    Laid down 23 Apr, 1944
    Ordered 15 Feb, 1944
    Shipyard Germaniawerft, Kiel

    Werk 787
    Construction not completed in May 1945.



    XVIII
    (1943)
    “Never Built” Walter-Uschiff (Walter sub)
    On 4 Jan, 1943 contracts were granted to Deutshce Werke in Kiel for 2 XVIII Walter submarines (werk # 330 and 331). These boats (U-796 & U-797) were intended to be the first real combat Atlantic submarines based on the Walter design and they had incredible potential on the drawing board.
    These boats were transferred to Germaniawerft in Kiel on 14 Dec, 1943 for completion but were cancelled in favour of the XXI on 28 March 1944. The XXI electro boat was extremely similar in appearance and size but used massive amount of batteries (3 times the power of the VIIC) to reach submerged speed of 17 knots.
    U-796 and U-797 were broken up on the slips at Germaniawerft in 1944. “Never Built”



    XIX
    (1943)
    “Never Built” U-(transport)-Frachtschiffe (merchant subs)
    Designed by the OKM from the XB plans in late 1942. Those large vessels were nor armed with any offensive armament, only AA guns, as they were only for transportation of material. Those plans were preliminary for the type larger XX U-boats and no contracts were awarded. A design for a large freighter submarine based on the late 1942 type X B boat. Supposed to carry important material to and from Germany.



    XX
    (1943)
    “Never Built” U-(transport)-Frachtschiffe (merchant subs)
    Designed in 1943 by AG Weser and the OKM (German Navy High Command) as transport U-boats to carry material from the Far East. They were based on the type XB mine layers. They could carry 800 tons of material and they had no torpedo tubes and no deck gun, only AA armament. They were to have a crew of 6 officers and 52 men. 30 contracts granted, 15 to Deutsche Werft in Hamburg (U-1601 thru U-1615) and 15 more (U-1701 thru U-1715) to Vegesacker Werft in Bremen-Vegesack. Of those 30 contracts only 3 (U-1701 thru U-1703) were continued after 15 Aug 1944, but none was completed and their construction was halted in early 1945.
    Developed for possible voyages to the Far East..
    Thirty were planned. “Never Built”



    XX-B
    (1943)
    “Never Built” U-(transport)-Frachtschiffe (merchant subs)
    Yet another late war project for a large freighter sub.



    XXI
    (1944) Unterseeschiffe (subships)
    The most important submarine based on new technology which stayed unsurpassed for a decade! The XXI came to late but the plan was to halt all other U-boat production and make some 1500 of this new type.

    118 boats commissioned.
    U-2501 - U-2531, U-2533 - U-2536, U-2538 - U-2546, U-2548, U-2551 - U-2552,
    U-3001 - U-3035, U-3037 - U-3041, U-3044, and, U-3501 - U-3530.



    XXI-B
    (19??)
    “Never Built” A planned electro-type like the XXI.



    XXI-C
    (19??)
    “Never Built” A planned electro type like the XXI. Among other improvements, this boat would have a larger amount of torpedo tubes to gain better firepower.



    XXI-D
    (19??)
    “Never Built” A planned electro type on the base of a XXI. This boat however would have been a brand new submarine tanker.



    XXI-E
    (19??)
    “Never Built” A planned electro type on the base of a XXI. This boat was to be a new large submarine freighter.



    XXI-T
    (19??)
    “Never Built” A planned electro type on the base of a XXI. This boat was to be a new large submarine freighter.



    XXII
    (1944?)
    “Never Completed” Unterseeboote für Mittelmeer und küstennahe Verwendung (subs for the Mediterranean Sea and coastal areas)
    A small coastal boat (for Mediterranean purposes?) from which type XXIII later was developed.
    Of the 72 contracts only two got far enough in production line to receive numbers (U-1153, U-1154).



    XXIII
    (1944) Unterseeboote für Mittelmeer und küstennahe Verwendung (subs for the Mediterranean Sea and coastal areas)
    Type XXIII, the coastal counterpart of the full sized XXI.
    New, late war tactics played a role in the making of this boat.

  4. #19
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    XXIV
    (1943)
    “Never Built” Walter-Uschiff Projekt (Walter subship project)
    A 1943 design to a ocean-going U-boat using the Walter turbine. It was to have 14 torpedo tubes below the CWL, six at the bow and 4 each side trailed aft (The Schnee Organ). 14 torpedoes, AA guns the same as for the XXI. No contracts were granted. Based on Type XVII and similar in appearence to Type XXI.



    XXV
    (19??)
    “Never Built” Elektro-Unterseeboot Projekt für Küsteneinsatz (Coastal E-sub project)
    These vessels were to be a pure U-boats with electric-only propulsion and to operate as coastal U-boats. Roughly 160-tons with a similar hull to the of type XXIII. With a crew of about 58 men the would have 2 torpedo tubes fitted at the bow below CWL, 2 torpedoes only, no other armament. No contracts granted for these boats.
    A U-boat able to run submerged and silent for long periods, propulsed by electric only.



    XXVI-A&B
    (1944?)
    “Never Completed/ Never Built” Hochsee-Walter-Uboot (highsea Walter sub)
    Laid down as high-seas U-boats propelled by the Walter turbine, they were to have a crew of 3 officers and 30 men. They were to have 10 torpedo tubes, 4 at the bow and 6 in a so-called Schnee organ, no AA guns. 100 contracts were awarded to the Blohm & Voss yard in Hamburg (U-4501 thru U-4600) and sections were under construction for U-4501 thru U-4504 when the war ended, the other contracts had been cancelled at the time.
    A large sub that was to take up the fight in the front zones.
    “Never Built”

    XXVI-E1 Alternativ-Projekte zu XXVI (alternatives to XXVI)

    XXVI-E2 Alternativ-Projekte zu XXVI (alternatives to XXVI)



    XXVI-W
    (19??)
    “Never Built” Alternativ-Projekte zu XXVI (alternatives to XXVI)
    A Walter engine equipped boat with stunning speed abilities, submerged.



    XXVII-A
    (1944) Kleinst-Uboot "Hecht" (mini-sub)
    Type XXVII A - also known as "Hecht" (Eng: Pike).
    A small coastal mini U-boat equipped with only one torpedo and propulsed with a torpedo motor this was really a midget sub.
    Original design from Midget U-boat "Molch".(U-2111 - U-2113 and U-2251 - U-2300)
    Minly used for training and testing. About 53 were built. 3 man crew



    XXVII-B 5
    “Type 127”
    (1944) Kleinst-Uboot "Seehund" (mini-sub)
    Type XXVII B - also known as "Seehund" (Eng: Seal).
    A small boat operated by two men known as "Germanys
    most successful type of the mini subs".
    Original design from (improved) Midget U-boat "Hecht".
    There were to be 1000 of this late war type.
    Over 138 were were commissioned into the Kriegsmarine. But 285 were built. (U-5001 - U-5118 and U-5251 - 5269) About 50 Seehund boats had an additional fuel storage that gave them a range of 300 miles at 7 knots surfaced and 63 miles at 3 knots submerged. These saw limited action at Dungenees.



    XXVIII
    (1943)
    Projekt, Reines Unterseeboot für Mittelmeereinsatz (indirekter Walterantrieb) (Walter sub for Mediterranean Sea).



    XXVIII-F
    (1944/1945?) Projekt, "Schwertwal" (project)
    "Schwertwal I" (Eng: ?), This vessel, also known as SW 1, was built only as a prototype. It was designed to use a Walter-turbine in a midget-boat. It was built to reach a maximum speed of 30 knots while submerged.
    The prototype was scuttled in May 1945 in the Plöner See. Two months later the SW 1 was raised by English Royal Marine Engineers, which had searched for the boat. Later they scrapped it in Kiel.
    It was supposed to be an underwater fighting craft with functions similar to fighter aircrafts. Equipped with Dräger ventilation and air purification system, auto pilot and automatic direction finder. Only prototype was made.
    1 were built.



    XXVIII-F2?
    (1944/1945?) "Schwertwal II" (Eng: ?), another small sub built at the end of the war. It was supposed to be an underwater fighting craft with functions similar to fighter aircrafts. Equipped with Dräger ventilation and air purification system, auto pilot and automatic direction finder. Only prototype was made.
    1 were built



    XXIX-A
    (19??)
    “Never Built” Studienprojekte zur SKL-Forderung "halbe XXI-Maschinenanlage" (project-study)
    A larger coastal boat (?)



    XXIX-B
    (19??)
    “Never Built” Studienprojekte zur SKL-Forderung "halbe XXI-Maschinenanlage" (project-study)
    A larger coastal boat (?)



    XXIX-B1
    (19??)
    “Never Built” Studienprojekte zur SKL-Forderung "halbe XXI-Maschinenanlage" (project-study)
    A larger coastal boat (?)



    XXIX-C
    (19??)
    “Never Built” Studienprojekte zur SKL-Forderung "halbe XXI-Maschinenanlage" (project-study)
    A larger coastal boat (?)



    XXIX-D
    (19??)
    “Never Built”
    Studienprojekte zur SKL-Forderung "halbe XXI-Maschinenanlage" (project-study)
    Ocean going project boat (?)



    XXIX-E
    (19??)
    “Never Built” Ocean going project boat (?)



    XXIX-F
    (19??)
    “Never Built”
    Studienprojekte zur SKL-Forderung "halbe XXI-Maschinenanlage" (project-study) Ocean going project boat (?)



    XXIX-GK
    (19??)
    “Never Built” Studienprojekte zur SKL-Forderung "halbe XXI-Maschinenanlage" (project-study) Ocean going project boat (?)



    XXIX-H
    (19??)
    “Never Built” Studienprojekte zur SKL-Forderung "halbe XXI-Maschinenanlage" (project-study) Ocean going project boat (?)



    XXIX-K1
    (19??)
    “Never Built” Vergleichsentwurf zu XXIX A – D (comparative design to XXIX A-D) Ocean going project boat (?)



    XXIX-K2
    (19??)
    “Never Built” Vergleichsentwurf zu XXIX A – D (comparative design to XXIX A-D) Ocean going project boat (?)



    XXIX K3
    (19??)
    “Never Built” Vergleichsentwurf zu XXIX A – D (comparative design to XXIX A-D) Ocean going project boat (?)



    XXIX-K4
    (19??)
    “Never Built” Vergleichsentwurf zu XXIX A – D (comparative design to XXIX A-D) Ocean going project boat (?)



    XXX-A
    (1944)
    “Never Built” A late 1944 project for an ocean going boat w. v. (as above)



    XXX-B
    (1944)
    “Never Built” A late 1944 project for an ocean going boat close related to the Type XXX A. The B-version was shorter and lighter with less firepower. Eight torpedo tubes.



    XXXI
    (1944)
    “Never Built” A late 1944 project for an ocean going boat.
    Planned to have 8 + 4 torpedo tubes.



    XXXII
    (1944)
    “Never Built” Projekt, Kleinst-Uboot nur Batterie (minisub project, battery only)
    A late 1944 project for an ocean going boat (?)



    XXXIII
    (1944)
    “Never Built” Projekt, Küsten-Uboot mit Dieselkreislaufantrieb (minisub project, diesel recirculation) A late 1944 project for an ocean going boat.
    Planned to have 4 bow torpedo tubes.



    XXXIV
    (19??)
    “Never Built” Projekt, wie XXXIII jedoch ohne Turm (project similar to XXXIII but without sail) A late project for a small coastal boat with great speed submerged.



    XXXV
    (19??)
    “Never Built” Projekt, Uboot für reine Sauerstoffverwendung (project, sub for Oxygen use)
    A late project for an ocean going boat, smaller than the XX-, the VII- and IX-types but stll with a pretty good speed both above and below surface.



    XXXVI
    (19??)
    “Never Built” A late project for an ocean going boat. w. v. (as above)



    Listed As Other Or Not Sure Where To Put It In The List. ( Note most other foreign subs in German hands are not included here but i could add those...) Mini Subs On Next Post...

    UA
    (1938)
    “Not Delivered” Built by Germania Werft for export to Turkey, as the "Batiray".
    Not delivered - kept in Germany for the Kriegsmarine. 1 were built: UA. 45 men

    Projekt K Kleines Tauchboot für Naheinsatz (Diesel-Kreislaufantrieb) (small sub for close combat, diesel recirculation)
    VB 60
    (1939) Versuchs-Uboot (Test sub) another test sub similar to the V 80
    V 80 Versuchs-Uboot (Test sub) Walter 28k
    V 300 Versuchs-Uboot (Test sub)

    Other...

    VS 5
    (1939)
    Details found! VS 5 was an experimental semi-submersible torpedo boat (Versuchs Schnellboot) completed in 1941. Designed in 1939 and based on a 1938 patent by a Berlin dentist. The intended armament included two 21in torpedo tubes and two 2cm cannon. Its fate after 1941 is unknown. It was considered highly dangerous! No record of its fate. 17 crew men were carried.
    Last edited by 50gunship; 07-18-2007 at 11:04 PM.

  5. #20
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    Last But Not Least...

    Mini Subs
    Biber
    (1944-45)
    Midget U-boat "Biber" (Eng: Beaver), another small, one man sub built at the end of the war. Click here and click here for colour images of Biber 90 (in new window), today at Imperial War Museum. About 325 were built. 2 torpedoes slung underside. No reloads.



    Molch
    (1944-45)
    Midget U-boat "Molch" (Eng: Newt/Salamander), another small, one man sub built at the end of the war.
    All electric to operate mainly below surface. Approximately 363 were built. 2 torpedoes slung underside. No reloads.



    Marder
    (1944)
    Midget U-boat "Marder" (Eng: Marten), another small sub built at the end of the war. This actually was a manned torpedo with a war-head torpedo underneath. About 300 were built. 1 torpedoes slung underside. No reloads.



    Neger
    (1944-45)
    Midget U-boat "Neger" (Eng: Negro), another small, one man sub built at the end of the war. Reliable, detailed data missing. All info below therefore, more or less, are estimated. About 200 were built.



    Delphin
    (1944-45)
    Midget U-boat "Delphin" (Eng: Dolphin), another small sub built at the end of the war. Only the prototype of this fast, new tech, midget sub was made - the Experimental apparatus 205. 1 were built.



    Seeteufel
    (1944)
    Midget U-boat
    "Seeteufel, or Elefant" (Eng: Sea-devil or Elephant), another small sub built at the end of the war. (Also known as Project Lödinge). The Seeteufel could move on land like a tank to make its own way to water, it was fitted with Dräger ventilation and air purification system. ? were built. 2 men 2 torpedoes slung underside or 2 mines. No reloads



    Grundhai
    (1944)
    Midget U-boat
    "Grundhai" (Eng: ?), a project for a deep sea rescue craft designed to dive to 1000 meters. It was to have tracks to be able to crawl on the sea bed. 1 were built. Deep sea rescue U-boat.


    Infomation is hard to come by so if you can fill in the gray areas it would be helpful... Thanks.

  6. #21
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    Default Lafferenz Projekt, ICBM for the Kriegsmarine.

    Lafferenz Projekt, ICBM for the Kriegsmarine.

    One remarkable technological experiment

    Director OTTo Lafferenz of the German Arbeitsfront, work front had proven by practical attempts that a submarine up to three could drag largest dipable flotation chambers. With U 1063 underwaterdrag tested and showed only minimum problems. From the question resulted whether it was possible to carry in these flotation chambers A 4-Raketen.

    The thought was to start these rockets from the dipping containers. Thus 1943 a further project developed. The transportation and firing container should have a length of 37 m and a diameter of 5,5 m. With the size one spoke of the enormous water displacement of 500 tons. After reaching the goal the tail would have been flooded and the flotation chambers would have perpendicularly placed and approx. 5 meters risen up out of the water.

    The Type XXI u-boote and the container for the V-2.




    On a gyro-stabilized platform A 4 would have been refuelled and examined. The current supply should take place via the submarine. Briefly before the start the operator crew would have left the container. The starting signal would have been given from the submarine. On the start distance within the flotation chamber one intended to lead A 4 in rails and to return the gas jet across a Schurre around l80°, so that he could withdraw upward. For the travel over the Atlantic one computed about 30 days with 12 nautical miles speed to the planned goal (the USA). The container would be towed by a tp XX1 "elektro boat" submarine, and it ws expected to shot the missile about 200-220 km from the U.S coast, the main target New York.

  7. #22
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    The Lafferenz Project






    http://www.everything2.com/index.pl?node_id=1818438




    The Lafferenz project was based upon an idea in the fall of 1943 by Deutsche Arbeitsfront Direktor, Otto Lafferenz which he had after witnessing the test launch of an A4 rocket. He proposed a submersible barge containing the ballistic missile be towed across the Atlantic by U-boat and then tilted upright to fire the rocket.

    Little bio-graphical information survives about Otto Lafferenz and his fate after the war is unclear. Any further information would be welcomed. It is quite possible that he was either killed or captured by Soviet forces. Another possibility is that he may have been evacuated from Peenemunde along with Werner von Braun. In the latter case, it is possible he was given US citizenship and a new false identity to work on the US submarine ballistic missile program. Lafferenz supervised slave labour and therefore, if he survived the war, would have probably needed to conceal his Nazi activities. These remain just conjectures until firm bio-graphical details emerge.

    This rocket was more commonly termed the V-2 missile. Peenemunde engineers termed the rocket type as Aggregate 4 which reflects how the lineage evolved with aggregated features from one missile to the next, gradually building performance.

    . The correct name appears to have been Projekt Schwimmweste (project swim vest) and also as Apparat F. From December 1944 Dr ****mann led a team of engineers to create Lafferenz capsules.
    The 105ft long (32 metre), 300 ton Capsule was intended to launch a 46 foot long, V-2 rocket at New York from within the 190 nautical mile range, which the missile could be fired. Plans later evolved to consider towing three 500 ton capsules. Tests were conducted with one Lafferenz capsule in the Baltic by U-1063 for Weapon Test Department 10. The whereabouts of this capsule after the war remains a mystery.

    At least one uncompleted Lafferenz capsule was captured by Soviet forces at Stettin in the Eastern Baltic. Another capsule was completed in Schichau dockyards at Elbing, but could not be located after the war. A contract is known to have been let with Stettiner Vulcanwerft for construction of three such capsules.

    U-873 was thought to have attempted a launch at New York, but to have aborted the mission in the last days of World War 2. She had originally been loaded with cargo in her keel for a mission to Japanese territory and then in March 1945, her mission was changed at short notice to attack New York. U

    If U-873 had indeed embarked upon such a mission, then it is likely it was abandoned at sea, well away from New York. US Naval intelligence certainly seemed convinced that Steinhoff had been on a Lafferenz type mission.


    In practice storage of the liquid fuel of the V-2 created many problems in terms of time required to pre-pare for a launch. The sodium permanganate for example used to generate steam for the high speed fuel pumps, had to be preheated. Gyroscopes needed to be spun up. The rocket's own fuel tanks needed to be filled without spillage as this could lead to explosion if the chemicals mixed.


    The V-2 fuel comprised 8 tons of fuel, including liquid oxygen with ethyl alcohol and sodium permanganate for the turbo pump. Fuels would be stored in the barge's own tanks until before launch when there would be a transfer to the rocket's own tanks.

    Another draw back was the high fuel consumption of the towing u-boat made the mission all but impossible except for a type IX-D2 class u-boat.
    Plans have come to light after the war in private hands, which indicate the V-2 was intended to target lower Manhattan with a nuclear warhead. On Tuesday 2 April 1946, the New York Times published a map captured from Reichsmarschall Hermann Goering's files, illustrating the aiming point for Vergeltungswaffe weapons at Delancey Street and the Bowery. This point was designated Zielpunkt.

    On 10 December 1944, New York's mayor Fiorello LaGuardia disclosed to the press he had knowledge of planned attacks. Then in January 1945, Germany's Chief of War Production, Albert Speer boasted in Berlin radio broadcasts of planned Vergeltungswaffe attacks on New York.

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    Sub aquatic rocket launchers, The Do 38 Gerät:

    The idea to fire rockets under water came from the Peenemuender Dr. Ing. Ernst Steinhoff. No miracle, because its brother was the commander of submarine captain second lieutenant stone-hopes. In order to be able to accomplish at all first attempts, one used existing solid fuel rockets.



    Under responsibility of Walter Dornberger (= name giver) were in the 30's for sucked. Nebula troop, a military unit at first responsibly for atomising, different rocket launchers developed. So e.g. also the DO equipment 38, which was intended for paratroopers. Starting from 1941 one manufactured and others "weight the launcher 41", a rack for four steel luggage crates, manufactured from steel. In each case six steel luggage crates were fastened provisionally in a thrower rack on deck of the submarine U 511, which belonged to the IX C-class. At the 4.Juni 1942 the first firing attempts of this submarine in the dipped condition in the proximity Greifswalder Oie took place. It gave fewer problems than expected.

    The submerged depth amounted to 10-15 m. Even if the reached distance amounted to only 4 km, then the procedure in several salvos had proven as practicable. As a result of the initial "guidance" that projectile in the water arose a smaller dispersion. Thus the thought was obvious, on goals, in particular to outer fuel stored at the coast, of shooting from approximately three kilometers distance. Since the office for naval weapon with that was not content provisional structure of the thrower racks,
    Another wa sthat the submarines rarely dare to approach so near the allied coasts.


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    Quote Originally Posted by Panzerknacker View Post
    The Lafferenz Project






    U-873 was thought to have attempted a launch at New York, but to have aborted the mission in the last days of World War 2. She had originally been loaded with cargo in her keel for a mission to Japanese territory and then in March 1945, her mission was changed at short notice to attack New York. U
    The crew of U-873 were interrogated by the USN while POW's, after the end of the war, and a report on the finding of this interrogation are on the uboat. net site

    http://www.uboatarchive.net/U-873PreliminaryReport.htm

    There is no mention of the Lafferenz Project by the crew, and if we take into account this interrogation took place post-war, after the defeat of Germany, and therefore there was no longer any need for secrecy. I would take the view the U-873 had no involvement in the project

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    There is no mention of the Lafferenz Project by the crew,
    Thanks for the data, I guess my source was pretty lousy.

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    Default U-Bootes in Mar del Plata.

    U-bootes in Mar del Plata.

    At the end of 2 ª World war, in 1945, two German submarines gave up themselves in the Argentine Naval Base of Mar del Plata. On July 10, 1945 the U-530 gave up itself, with his crew of 54 men commanded by the Oberleutnant Otto Wermouth; On August 17 the U-977 gave up itself, with 31 men under the command of the Oberleutnant Heinz Zchaffer.

    U-530







    August 17, 1945

    In the sparkling waters off Mar del Plata, Argentina, a submarine's prow breaks the surface. Up comes the U-977, commanded by Capt. Heinz Schäffer. She sits dead in the water until the Argentinian cruiser Belgrano comes alongside. Then Schäffer is piped aboard the Belgrano and surrenders his boat and crew.

    During the debriefing, the Argentinian commodore told Schäffer:

    Captain, I must tell you that your boat is suspected of having sunk the Brazilian steamship Bahia a few days ago. It is also suspected that you had Adolf Hitler, Eva Braun and Martin Bormann on board and put them ashore on the southern part of our continent.

    Schäffer was stunned. But it was no joke, as he himself learned when he was flown to Washington D.C. and held prisoner for months "as though I were a major political figure of the Third Reich.

    ( Idle to say that the alleged figure was A.H in person )

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    Default Re: U-Boote Typ XX1

    50 Gunship: Do you have any more info on the VB60 trials submarine??

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