DD or Duplex Drive tanks, nicknamed 'Donald Duck tanks', were a type of amphibious swimming tank developed by the British during the Second World War. Ddtank thai เปิดแล้วคนเยอะสนุกสุดมันส์ กิจกรรมเยอะ แจกฟรี ไอเท่มมากมาย ไม่ต้องโหลด เล่นได้เลยฟรี boomz เกมส์ปาระเบิดบนเว็ป เล่น.
About the game: Title: Status: Released Graphics: 2D Genre: Type: Browser Developer: NGames Publisher: Aeria GamesDDTank is a free to play 2D turn based multiplayer online shooter. There is no need to download, just login and play. You can compete with different players in game and engage in cartoon warfare with strange and unique weaponry, all from the safety and comfort of their web browser of choice.
The simple keyboard operation makes interaction and PvP easier so that players can enjoy the excitement and fun. Carrying on in the tradition of hit games like Worms and, DDTank is a turn-based PvP shooter already enjoyed by over 3.5 million players. Combining a selection of hilarious weapons with a wealth of social features, DDTank provides an explosive experienceNo need to download: The first Q-version casual browser game that requires no download.
Only login is needed.Q-version lovely graphs: Cartoon style character design,fresh and lovely pictures.Various battle modes: Enjoy the fun of either breathtaking BOSS raid or PvP competition!Music and sound effects: The first browser game with background music and sound effects in battle. Relaxing music combining with funny sound effects makes the game more lovable.Fashionable suits: Show yourself by freely selecting from thousands of dressing style, from hat,eyes,clothes to facial expression,etc.
It must be preordained to have someone look exactly like you among millions of people.Superb special effect: Different weapons have different attack effects. You may like using a stone age “zax”, or a modern”cannon”,or even a ultra modern “light gun”!Diversified costumes and items in shopping mall can let you display your personal charm and enjoy countless hours of fun. Ddtank Its like a replica of gunbound. But it has its own perks too. Like weapon and outfit fortification but because of that it made the game imbalance. Like if your lv35 then your opponent is lv35 but your +11 then your opponent is +12 its super hard to win Its not a pay to win game but.
Its just really imbalance and its hard to master maybe 3months worth of practicing you can have a sure shot. And levelin here is hard like im level 39 for like im playing 3 years already but i stop sometimes so. Hmm the exp rate is considerable And then the jewels here. Its so cash based you need to load just to have +5(max) like so so so expensive. And you cant get strong here.
This game is really hard and competitive but its noob friendly so thats why many new players play this game Its a 2/5 game ? its worth the try but remember its hard to get strong here. And oh i forgot If u want to fortify your weapon and not having the weapon downgraded(fail) you need to buy divine amulet it protects your item from being downgraded so yeah This game is like pay to get strong i rest my case. Very fun game for 2 weeks butafter that you see it’s play to win.new servers always empty the old ones, imbalanced pvp battles when high level meets low level.
But this is worms style and cooreans/japanese use calculators that simply tell them what angle and what power to use.I got defeated by new players because they never missedNEVER, steer clear if you want to play this a long time.It’s fun for a few weeks only.Also the clans are dominated by the bigger cheating players, small/single players will not go far.
DD or Duplex Drive tanks, nicknamed ' tanks', were a type of swimming developed by the British during the. The phrase is mostly used for the Duplex Drive variant of the, that was used by the Western Allies during and after the in June 1944.DD tanks worked by erecting a 'flotation screen' around the tank, which enabled it to float, and had two propellers powered by the tank's engine to drive them in the water.The DD tanks were one of the many specialized assault vehicles, collectively known as, devised to support the planned invasion of Europe.
Diagram of a flotation screen fitted to a Tetrarch tank, taken from Straussler's patent, issued 1945Amphibious tanks were devised during the; a floating version of the British was being tested in November 1918, just as the war ended. Development continued during the.As tanks are heavy for their size, providing them with enough was a difficult engineering problem. Designs that could float unaided were generally small and light with thin armour, such as the Soviet. Heavier vehicles, such as the experimental, British AT1. had to be so large that the design was impractical.The alternative was to use flotation devices that the tank discarded as soon as it landed–the approach adopted by the Japanese with their and amphibious tanks.
In Britain, the Hungarian-born engineer developed collapsible floats for Vickers-Armstrong that could be mounted on either side of a light tank to make it amphibious. Trials conducted by the British showed that such a tank, propelled by an, 'swam' reasonably well. Valentine DD tank with screen lowered and gun pointing towards the rear of the vehicleThe system was unsatisfactory in other ways, due mainly to the unwieldy bulk of the floats that were big enough to float a tank – these were each roughly the size of the tank itself. In practice, there would be severe difficulties in transporting enough floats, even collapsed ones, to move a large unit of tanks across a body of water. Also, such floats made a tank too wide to launch from an off-shore landing craft, making their use in amphibious landings impractical.In 1940, Straussler solved the problem by devising the flotation screen – a device which folded and was made of waterproofed. The screen covered the top half of the tank effectively creating a canvas, greatly increasing the vehicle's, and providing buoyancy in the water. When collapsed, it would not interfere with the tank's mobility or combat effectiveness.The first tank to be experimentally fitted with a flotation screen was a redundant light tank provided to Straussler.
Its first trial took place in June 1941 in (also known as Welsh Harp Reservoir) in north London in front of General (at the time General Officer-in-Command Home Forces). The reservoir had been the location where trials of the floating version of the World War I, took place, 23 years earlier. Satisfactory sea trials of the Tetrarch took place in Harbour.A prototype of a Duplex Drive began trials on 21 May 1942, although it subsequently sank (during a trial in which it was subject to machine gun fire). In June 1942, permission was given by the for the manufacture of 450 Valentine DDs.It later became clear that the was more suitable for use with a screen than the Valentine and the DD screen was adapted for the Sherman by April 1943. One reason for this was that the Sherman could move in the water with its gun forward ready to fire as soon as land was reached. The Valentine was also an older and generally inferior design.Training.
A Valentine DD tank being loaded onto a landing craft prior to a training exercise, Stokes Bay, Hampshire, January 1944Valentine DDs were used for training and the majority of the US, British, and Canadian DD crews did their preliminary training with them. Crews learned elementary phases of the DD equipment at, on the / border. Here they learnt to waterproof and maintain their tanks, use Amphibious Tank Escape Apparatus, launch from mock up ramps and navigate around the two and a half mile lake. After two weeks of training at Fritton, the crews moved to, Hampshire for three weeks of intensive training from landing craft. The DDs would be loaded on the hards at Stokes Bay, and launch into the.
They would form up in echelon, cross 1,200 yards (1,100 m) of water and land at on the. The regiments would then move to Combined Training Centres, such as at the in Scotland and Barafundle Bay in Wales to train with other elements and units, during which period crews incurred several losses.On 4 April 1944, was held at with the Valentine DDs. The trial run of the tanks ran into difficulty when a change in the weather adversely affected the sea conditions. Six tanks sank with the loss of six crew members.The sunken wrecks of at least 10 tanks, lost during training, are known to lie off the British coast. Another sunken DD tank remains at the bottom of Fritton Lake.
Sherman DD. Rear view of a Sherman DD with its screen raised, showing the twin propellers in their lowered positionModifications to the Sherman included the sealing of the lower hull, the addition of the propeller drive and the addition of Straussler's flotation screen around the hull, together with its inflation system.
The base of the canvas flotation screen was attached to a horizontal mild steel boat-shaped platform welded to the tank's hull. The screen was supported by horizontal metal hoops and by 36 vertical rubber tubes.
A system of compressed air bottles and pipes inflated the rubber tubes to give the curtain rigidity. The screen could be erected in 15 minutes and quickly collapsed once the tank reached the shore. In practice there was about 3 ft (0.91 m) of. In combat, the flotation system was considered expendable and it was assumed the tank crew would remove and discard it as soon as conditions allowed. In practice, some units kept the flotation equipment and their tanks were used in several amphibious operations.A pair of propellers at the rear provided propulsion. One problem presented by the Sherman was that the configuration of the transmission (gearbox at the front) made it impossible to take a drive-shaft directly from the gearbox to the propellers. The solution to this was to have sprocket wheels at the rear of the tank so power was delivered to the propellers by the tank's tracks.
DD Tanks could swim at up to 4 knots (4.6 mph; 7.4 km/h). Both the commander and the driver could steer in the water, although with different methods. A hydraulic system under the control of the driver could swivel the propellers; the commander from a platform at the rear of the turret, where he could see over the skirt, could contribute by operating a large.The first DD Shermans produced by the British were used by both British and US units. Later production was by both the US and the UK. British Shermans were Sherman III (M4A2) and Sherman V (M4A4) conversions. The US used the M4A1 only for their conversions.Experience from D-Day led to an improved, Mark II version of the DD Sherman.
The screen was extended and strengthened by fixing to the turret, a new type of bilge pump fitted and a second set of hydraulic steering controls was fitted at the commander's station, although his tiller was retained. An air compressor replaced the air cylinders that provided the pressurized air to erect the screen. After D-Day, US Army interest decreased, looking for other options.While the US Army in Europe used the Sherman DD design, in the Pacific were equipped with armor and guns to support landings up to the sea line; from the sea line, tanks were supposed to support infantry.Later flotation screen use. Infantry Fighting Vehicle emerging from the water at (1983). This M2 uses a screen but is not DDDesigns were made to give the and the DD treatment, but these were never completed. A floating, flame-thrower equipped version of the was tested, as was a flamethrower-equipped DD Sherman.
This towed an armoured fuel trailer, like those used by the. The trailer, in the water, was supported by an inflatable flotation device.After the war, the was tested with a flotation screen and duplex drive.
By the end of the 1950s, development of DD tanks had ceased, partly because were becoming too heavy to be practically made to swim – although experiments were carried-out in the mid-1960s with a floating Centurion that used a similar system, but with rigid panels instead of a flexible screen.The 38 tonne was fitted with a flotation screen that allowed it to swim.Medium and light vehicles continued to be made amphibious by the use of flotation screens into the 1980s, but without the DD. Instead, they used the movement of their standard running gear (e.g. Tracks) for water propulsion also. These included the Swedish (S-Tank), the American light tank, the British, the Mark IV version of the and early versions of the American. Of these, only the FV432 and the Bradley remain in service and current versions lack flotation screens.Combat The main use of DD tanks occurred on D-Day. They were also used in, the invasion of southern France on 15 August 1944;, the British crossing of the on 23 March 1945 and in several operations on the in 1945. DD Tanks were sent to India; the were trained in their use, but planned operations against the Japanese in Malaya never occurred.
Men of engaged in house to house fighting with the Germans at Riva Bella, near. Sherman DD tanks of 'B' Squadron, are providing fire support and cover, 6 June 1944The DD Sherman was used to equip eight tank battalions of American, British, and Canadian forces for the D-Day landings. They were carried in, also known as Landing Craft, Tank (LCT). These could normally carry nine Shermans, but could fit fewer of the bulkier DDs. British and Canadian LCTs carried five tanks, the Americans carried four as their LCTs were shorter at about 120 feet (37 m).The DDs would typically be launched around two miles from the shore, swim to the beaches and overpower the German defences.
The tank's record was a mixture of success and failure, although they are mainly remembered for their disastrous performance on.Sword BeachOn the British, at the eastern end of the invasion area, the DD tanks worked well, as the sea was reasonably calm. The DD tanks from 'A' and 'B' Squadrons of were launched 2.5 miles (4 km) from shore. Five could not be launched as the leading tank on its LCT tore its screen – they were later landed directly on shore – one tank sank after being struck by an LCT.Gold BeachOn, the sea was rougher. The tanks of the were launched late, about 700 yd (640 m) from the shore. Eight tanks were lost on the way in and by the time the remainder landed, (mine flail) tanks had already destroyed the German artillery and machine-gun positions that would have been their objective.
Sea conditions meant the tanks of ‘B’ and ‘C’ Squadrons, from the, were landed in the shallows. They then drove onto the beach with their screens up so they would not get swamped in the breakers. German anti-tank guns caused heavy losses in some sectors of the beach but the assault was successful.Juno BeachOn the Canadian, and the were equipped with DDs, but only those of the 1st Hussars could be launched. They were assigned to the 7th Canadian Brigade, at the western end of the beach. Some of the tanks were launched at 4,000 yd (3,658 m) and some at 800 yards (700 m); twenty-one out of twenty-nine tanks reached the beach. The 8th Canadian Brigade, at the eastern end of the beach, was forced to land without DD tanks because of rougher seas.
They suffered heavy initial casualties, but were still able to make good progress.Utah Beach. DD tanks on Utah beachOn, the DDs were operated by the. Armoured support was reduced by four DDs when their LCT was lost to German artillery fire. The remaining tanks were launched 15 minutes late 1,000 yards (914 m) from the beach. Twenty-seven out of twenty eight reached the beach but confusion caused by the massive smoke screen meant they landed around 2,000 yards (1,829 m) from their aiming point and saw some German opposition.
At around 7:45 A.M. The 3d battalion who was attached to the 8th infantry landed at Red Beach.
Soon after the 3rd battalion moved to Exit 2 that was now designated as the route vehicles would take to move inland. Some of the 70th tank battalion with its DD Shermans tagged along with the 3rd battalion. Part way along the causeway some congestion had been formed due to an 88mm anti tank gun and a ditch blown in the road. Two Shermans were knocked out (one of them was knocked out by a mine in the road) in the skirmish but the gun was cleared by a direct hit from another Sherman.Omaha BeachAt almost all of the tanks launched offshore were lost, their absence contributing to the high casualty rate and sluggish advance from that beach.The first wave at Omaha included 112 tanks: 56 from each of the 741st. Each of these battalions had 32 DD and 24 other Shermans (including many Sherman bulldozers for clearing obstacles). Starting at about 0540, the put 29 DDs into the sea, but 27 of these sank, the remaining two made the long swim to the beach.
Some of the crews of the sinking tanks managed to radio back and warn following units not to launch so far out. The remaining vehicles of the 741st Tank Battalion and all tanks of the 743rd Tank Battalion, (except for the four aboard one LCT that was hit by artillery fire just off the beach), were landed directly on the beach, starting at about 0640.DD Tanks were designed to operate in waves up to 1 foot (0.3 m) high; however, on D-Day, the waves were up to 6 ft (1.8 m) high. These were much worse conditions than the tanks had been tested in and hence they were swamped.
Also, the tanks of 741st Tank Battalion were launched too far out: about 3 mi (4.8 km) offshore. These factors also exacerbated the inherent difficulty of steering a 35 ton 'vessel' with a low freeboard. The crews were equipped with emergency breathing apparatus capable of lasting 5 minutes, the tanks were also equipped with inflatable rafts. Some sources claim that these life-saving measures were ineffective; this was contradicted by the testimony of survivors. Most of the crews were rescued, mainly by the landing craft carrying the, although five crewmen are known to have died during the sinkings.Until very recently it was believed that most of the DD Shermans of the were sunk almost immediately. Some stayed afloat for a matter of minutes; according to the crews one tank swam for 15 minutes, another: 'We weren’t in the ocean sic 10 minutes when we had a problem'.
Tanks at the other four beaches suffered no such problems.' The landing craft carrying them were drifting away from the target beach – forcing the tanks to set a course which put them side-on to high waves, thus increasing the amount of water splashing over and crumpling their canvas skirts.
Two tanks – skippered by men with enough peacetime sailing experience to know not to turn their sides to the waves – actually made it to the beach. It had been widely believed the other tanks sunk almost immediately on leaving the landing craft, but our work showed some had struggled to within 1,000 metres of dry land.' Operation Dragoon The landings took place on 15 August 1944 between and in southern France.A total of 36 DD tanks were used by three American tank battalions – the, the and the. The 756th had eight tanks that were launched 2,500 yards (2,286 m) from the beaches; one was swamped by the bow-wave of a landing craft and one sank after striking an underwater obstacle.
The twelve tanks of the 191st battalion were all landed on or close to the beach. Five of the C Company tanks of the 191st were immobilized by mines. The 753rd battalion had 16 tanks, of which eight were launched at sea and successfully reached the shore, eight were landed directly on the beach later in the day.Northwest Europe.
Sherman DD tanks crossing the Rhine, 24 March 1945The were converted to DD tanks after D-Day and trained initially at Burton-upon-Stather, near Scunthorpe, before moving with them to Belgium. From early September, they were based at Elewyt at Lac d'Hofstade. On 26 October 1944, they undertook a 7-mile (11 km) swim across the to attack, during the. The DD Tanks' longest operational water crossing took place without casualties, but they had great difficulty in landing – 14 became bogged down in mud and only four were available for action.Operation Plunder, the Rhine crossing, began on the night of 23 March 1945. As well as the Staffordshire Yeomanry, DD tanks equipped the American 736th and 738th Tank Battalions and the British. Some tanks were lost in the river, but the crossings were considered a success. The tanks were launched from points upstream from their objectives, to take account of the Rhine's strong current.
Mats laid at the objective points (carried across beforehand by ) allowed the DDs to climb the steep, muddy banks of the river.The DD's last combat swimming operation was the Staffordshire Yeomanry's crossing of the River at on 29 April 1945. Italian campaign By February 1945, the in Italy had been trained and equipped with DD tanks, both Shermans and Valentines. DD Shermans were successfully used in the crossing of the on 24 April. On 28 April, those tanks still able to swim were used in an assault across the River.
During this operation, Valentine DDs were used to transport fuel (their only known use on active service). The tanks continued to be used in combat in the advance towards Venice. There were no further swimming operations, but it was found that the folded flotation screen offered a large seating area, making the tanks useful troop transports.
'T-6 Device' An alternative to the DD was the 'T-6 Device', developed by the US Army. Limited numbers of the 'T-6 Device' were used by the US Army and Marines during the. The 'T-6 Device' kit consisted of a structure of box-like, pressed-steel floats (pontoons) mounted on the front, rear and sides of a Sherman. No propellers were fitted – propulsion was provided by the rotation of the tracks. The front and rear floats were discarded on the beach, some in the water.
Explosive bolts were used. Side floats were removed from the tanks on shore when the tactical situation permitted. In an oral interview with former Pvt. Maurice Dean Derby 37699146, Browning Automatic Rifleman, Co. A, 17th Infantry Regiment, 7th Infantry Division, he related that 'On the night of the landing (Okinawa, 1 April 1945) we were kept awake all night because the Tank Crews were beating on the pontoons with sledgehammers to remove them from the Tanks.'
The tanks were Co. B, 711 Tank Battalion.Compared with the DD, the floats were bulky and harder to stow, limiting the number of tanks that could be carried in a landing craft. However, the system was more seaworthy and had the advantage of allowing the Sherman to fire its main gun as it approached the beach.
The Sherman's gyroscopic gun stabilization allowed accurate fire even when the tank was being pitched by waves. German equivalent During planning for an invasion of England in 1940 , the Germans also worked on developing amphibious tanks capable of directly supporting infantry during a beach assault. German Tauchpanzer III under test (1940)The Schwimmpanzer II was a modified version of the which, at 8.9 tons, was light enough to float with the attachment of long rectangular boxes to either side of the tank's hull. The boxes were made of aluminum and filled with Kapok sacks to preserve buoyancy if water leaked into the pontoons. Motive power came from the tank's own tracks which were connected by rods to a propeller shaft running through each float.
The Schwimmpanzer II could make 5.7 km/h in the water. An inflatable rubber hose around the turret ring created a waterproof seal between the hull and turret.
The tank's 2 cm gun and coaxial machinegun were kept operational and could be fired while the tank was still churning its way ashore. Schwimmpanzer IIs were deployed from a specially modified landing barge (Type C) and could be launched directly into open water from a hatch cut into the stern. The Germans converted 52 of these tanks to amphibious use prior to Sea Lion's cancelation.Instead of floating, the, a modification of the and, drove on the sea-bed.
A rubber hose supplied the engine and crew with air and gave the waterproofed tank a maximum diving depth of 15 metres (49 ft) making it an extreme example of a. The Germans converted 168 Panzer IIIs and 42 Panzer IVs for use in Operation Sea Lion.Surviving DD tanks Valentine. Bovington Tank Museum.
From the original on 6 October 2008. Retrieved 12 September 2009. ^ Fletcher (2006). The Bovington Tank Museum. From the original on 6 October 2008. Retrieved 12 January 2008.
^ Fletcher (2006) p6. PRO WO 194/658. Fletcher (2006), p.8. 'Sherman DD' AFV Profile No.
20 Churchill and Sherman Specials. Brett Phaneuf, 14 April 2005. Retrieved 16 October 2018. 4 April 2017. Retrieved 16 October 2018.
Fletcher (2006), p.34. Fletcher (2007). Archived from on 1 June 2008. Retrieved 14 April 2008. AFV Profile No.
45. Fletcher (2006), p.39. History.army.mil. Sherman DD Duplex 14 April 2005. ^ oaa.org 1 June 2008 at the. 13 September 2007 at the (Excerpted from Omaha Beachhead (6–13 June 1944) American Forces in Action Series).
Historical Division. War Department (Washington, D.C.: Center of Military History, Facsimile Reprint, 1984, pp. 35–87) at shsu.edu. 30 May 2002.
^ Fletcher (2006), p.37. Fletcher (2006), p.38. Committee 34, The Armored School (1999).
Merriam Press. P. 34. Schenk, p.113.
Archived from on 2 April 2015. Retrieved 14 August 2008. Bibliography.
Evans, Martin Marix (2004). Operation Sealion 1940.
Pearson Education Ltd. (2006).
Swimming Shermans: Sherman DD amphibious tank of World War II (New Vanguard). Osprey Publishing. (2007). Churchill Crocodile Flamethrower. Osprey Publishing.
Schenk, Peter (1990). Invasion of England 1940: The Planning of Operation Sealion. Conway Maritime Press Ltd.External links Wikimedia Commons has media related to. Saving Private Ryan online encyclopedia, 14 April 2005. BBC online news 15 April 2005.
The First Hours of D-Day on Omaha Beach. Extracted from Omaha Beachhead (6–13 June 1944) American Forces in Action Series, Historical Division. War Department (Washington, D.C.: Center of Military History, Facsimile Reprint, 1984), pp. 35–87. Available on-line at the; also at the. Vaughan, Don. Neptune’s Treasures: A survey of ships and other craft lost during Operation Neptune.
Available on-line at the. are a voluntary organisation involved in the preservation and restoration one of the World War II testing sites for DD tanks on the banks of the River Trent. Their website contains interviews with those who worked on the then secret operations and those who lived in the area during the war.
It also includes photographs of the testing site past and present. covers the development of the DD Tank and training in the UK at the various specialist wings (1943–48).