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D-Day Invasion

Discussion in 'WWII General' started by Colin, Jan 13, 2003.

  1. Colin

    Colin Member

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    hello again. i have a question about a certain type of beach obstacle. i've been trying to find out what it is and what it does but no luck yet. it's a long wooden log that is elevated into sort of an angle by supports. if anyone could please tell me what they are and their purpose, i would really appreciate it. thanks
     
  2. Martin Bull

    Martin Bull Acting Wg. Cdr

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    I don't know if you mean something like this. Many of the D-Day Foreshore Obstacle defences were designed on an ad hoc basis with input from Rommel himself.

    'Foreshore obstacles consisted in their essentials of : -

    1) Stakes driven into the sea bottom, many carrying an anti-tank mine at the tip.
    2 ) Concrete tetrahedrons, also equipped at the apex with either steel blades or anti-tank mines
    3) Various other items, such as captured anti-tank obstacles
    4) Rommel's proposed 'nutracker mine'. This consisted of a stake let into a concrete housing containing a heavy shell. A landing-craft striking the stake would, by lever action, cause the other end to press against the fuze and detonate the shell. '

    Liddell Hart, note to 'The Rommel Papers', 1953 p. 458.
     
  3. charlie don't surf

    charlie don't surf Member

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    The obstacles you are thinking of are for denying ships access to the beach.

    regards
     
  4. C.Evans

    C.Evans Expert

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    They were also used because they were to rip the bottoms out of the landing craft.
     
  5. Erich

    Erich Alte Hase

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    If I remember the pics correctly the logs were euqipped with mines and were used for destroying landing craft/boats as well as amphibious Shermans.

    E
     
  6. Panzerknacker

    Panzerknacker New Member

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    And when the Germans realised troops were moving freely on teh shore, especially at Utah and Omaha-German snipers shot at and detonated the mines, blowing men who were sheltering behind them into smithereens.
    Also, the shrapnel from wooden logs is not nice!!! Imagine the destruction such shrapnel wrought!!!
    Their original intention was to rip open LC'S, especially the larger ships, detonate the mine, wreck the LCs and cause a buildup on the shore, which the defenders could capitalise on...
     
  7. Kai-Petri

    Kai-Petri Kenraali

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  8. De Vlaamse Leeuw

    De Vlaamse Leeuw Member

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    Oh, now that we are talking about D-Day. Can anyone give me some information about the ships used.

    Like the LCT, liberty ship, ... I'd like to know a few things about them:
    - speed
    - reachable targets
    - troops they could carry
    - tanks they could carry
    - the distance they could travel
    - ...

    Thanx
     
  9. Jet

    Jet Member

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    I'm not entirely sure about this but I heard somewhere that the LCT could carry about 30 men and it's top speed was 25 kph (whatever that means :confused: :confused: ). I'm guessing I am probably wrong on both counts, but just thought I'd give it a try.

    Jet
     
  10. Jet

    Jet Member

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    Oh yeah before I forget. Great pictures Kai 2nd and 4th pictures taken by Robert Capa on Omaha beach
     
  11. De Vlaamse Leeuw

    De Vlaamse Leeuw Member

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    kph means probably kilometers per hour.
     
  12. Doc Raider

    Doc Raider Member

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    I think if it's in nautical terms in probably means knots per hour. Although the spelling is off, knots means nautical miles.

    [ 14. January 2003, 11:51 AM: Message edited by: Doc Raider ]
     
  13. Doc Raider

    Doc Raider Member

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    Just to give you an idea of knots,
    Conversion table for
    knots to miles per hour
    KTS to MPH 5 Knots = 5.8 MPH
    10 Knots = 11.5 MPH
    15 Knots = 17.3 MPH
    20 Knots = 23.0 MPH
    25 Knots = 28.8 MPH
    30 Knots = 34.6 MPH
    35 Knots = 40.3 MPH
    40 Knots = 46.1 MPH
    45 Knots = 51.8 MPH
    50 Knots = 57.6 MPH
    55 Knots = 63.4 MPH
    60 Knots = 69.1 MPH
    65 Knots = 74.9 MPH
    70 Knots = 80.6 MPH
    75 Knots = 86.4 MPH
    80 Knots = 92.2 MPH
    85 Knots = 97.9 MPH
    90 Knots = 103.7 MPH
    95 Knots = 109.4 MPH
    100 Knots = 115.2 MPH
    105 Knots = 121.0 MPH
    110 Knots = 126.7 MPH
    115 Knots = 132.5 MPH
    120 Knots = 138.2 MPH
    125 Knots = 144.0 MPH
    130 Knots = 149.8 MPH
    135 Knots = 155.5 MPH
    140 Knots = 161.3 MPH
    145 Knots = 167.0 MPH
    150 Knots = 172.8 MPH

    http://www.disastercenter.com/convert.htm
     
  14. De Vlaamse Leeuw

    De Vlaamse Leeuw Member

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    Do you know where I can find a conversion in KMH (kilomers per hour)?
     
  15. Sniper

    Sniper Member

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    Erwin, here’s a few basic specs on the various LCT’s etc. used in WW2.

    Landing Ship, Infantry (Large) – LSI/(L)

    Crew, 290
    Max speed, 18 knots
    Range, 22,250 km (13,285 miles) at 14 knots
    Capacity, 2 LCM’s, 12 LCA’s, 230 landing craft crew, 1,100 troops

    Landing Ship, Infantry (Medium) – LSI(M)

    Crew, 170
    Max speed, 22 knots
    Range, 12,979 km (8,065 miles) at 13 knots
    Capacity, 2 LCM’s, 6 LCA’s, 60 landing craft crew, 370 troops

    Landing Ship, Tank Mk 1 – LST(1) (converted “Maracaibo” type oil tankers)

    Crew, 98
    Max speed, 11 knots
    Range, 12,045 km (7,845 miles) at 10 knots
    Capacity, 2 LCM’s, 20 25-ton tanks, 207 troops

    Landing Ship, Tank Mk 1 – LST(1) (purpose built “Boxer” type)

    Crew, 169
    Max speed, 17 knots
    Range, 14,830 km (9,215 miles) at 14 knots
    Capacity, 20 medium, or 13 heavy tanks, 27 trucks, 193 troops

    Landing Ship, Tank Mk 2 – LST(2)

    Crew, 211
    Max speed, 10 knots
    Range, 11,120 km (6,910 miles) at 9 knots
    Capacity, 2 LCVP’s, 18 heavy tanks, 27 trucks, or 1 LCT (5), 163 troops

    Landing Ship, Tank Mk 3 – LST(3)

    Crew, 104
    Max speed, 13 knots
    Range, 14,822 km (9,210 miles) at 11 knots
    Capacity, 5 LCA’s, 15 heavy, or 27 medium tanks, with crews, 14 trucks, 168 troops

    Landing Ship, Dock – (LSD)

    Crew, 254
    Max speed, 17 knots
    Range, 14,830 km (9,215 miles) at 15 knots
    Capacity, 2 LCT(3)’s or LCT(4)’s, or 3 LCT(5)’s with relevant crews, 263 troops

    Landing Craft, Tank Mk’s 1 to 3 – LCT (1-3)

    Crew, 12
    Max speed, 10 knots
    Range, 1,666 km (1,035 miles) at 10 knots
    Capacity, 3 heavy, or 6 medium, tanks with crews

    Landing Craft, Tank Mk 4 – LCT(4)

    Crew, 12
    Max speed, 9 knots
    Range, 2,035 km (1,265 miles) at 8 knots
    Capacity, 6 heavy, or 9 medium, tanks with crews

    Landing Craft, Tank Mk’s 5 to 8 – LCT(5-8)

    Crew, 52
    Max speed, 13 knots
    Range, 6,486 km (4,030 miles) at 11 knots
    Capacity, 3 heavy or 5 medium tanks, 54 troops

    Landing Craft, Infantry Large and Small – LCI(L) and LCI(S)

    Crew, 29
    Max speed, 14 knots
    Range, 14,822 km (9,210 miles) at 12 knots
    Capacity, 210 troops

    Landing Craft, Mechanised Mk’s 1 to 7 – LCM(1-7)

    Crew, 4
    Max speed, 8 knots
    Range, 1,577 km (980 miles) at 6 knots
    Capacity, 1 medium tank, or 60 troops

    Landing Craft, Assault – LCA

    Crew, 4
    Max speed, 7 knots
    Range, 95-150 km (60-95 miles)
    Capacity, 35 troops

    As well, several landing craft types were converted to other uses, such as the Landing Craft, Flak, (LCF), which carried eight 2-pdr pompom guns and four single 20-mm guns, the Landing Craft, Gun, (LCG), designed to engage pillboxes etc, which carried two 4.7-in guns (usually manned by Royal Marines), and one or two 20-mm guns, and the Landing Craft, Tank (Rocket), LCT(R), which could carry over 1,000 rockets, launching them from a distance of about 3 km’s (2 miles) into an area measuring 700 by 150 metres wide. These 1000 rockets would deliver 17 tons of explosives onto the target area in one hit.

    ___________________

    "Chamberlain seemed such a nice old gentleman that I thought I would give him my autograph."
    Adolf Hitler.
     
  16. De Vlaamse Leeuw

    De Vlaamse Leeuw Member

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    Thanks Sniper!
     
  17. Mike L

    Mike L Member

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    Hi all,
    Not sure if anyone will see this, last post seems a good while ago.
    Sorry Sniper but some of your LCT info is incorrect. I have done some research on this - my uncle was killed on Mk3 LCT Oct 44 (HMLCT 488).
    Various marks of LCT (eg1-5) were developed pre D-Day, the largest being the Mk3, produced in 2 series (No.s 300 - 499 and 7001 - 7150). Displacement (light) 350T, loaded 640T (1st series) 625T (2nd series). Dims: o/a length approx 190ft L x 31ft W.
    Propulsion: 1st series 2 x 500HP Davey Paxman deisel, 2nd series 2 x Stirling petrol.
    Both series max speed approx 10.5 to 11,5 Kts (knots, Nautical MPH).
    Best range: Series 1 deisel, 2700 NM @ 9 Kts (24 tons diesel fuel bunker).
    Complement (crew):12. Armament 2 x 2pdr or 2 x 20mm AA.
    Tank/cargo capacity: 5 Heavy tanks eg Churchill/11 Medium tanks eg Sherman/ 10 x 3 ton lorries/ 300T cargo.
    Some Mk3s converted to hospital, kitchen, Gun (LCG), rocket (LCR) and engineering vessels.
    Hope that is useful, I have more info if required.

    Best regards,

    Mike
     

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