Military Review

Hydrofoil Tank: The Famous Soviet Project

47
You will not learn the details of Project 80 from military-technical reference books and historical books. ABOUT tanksseasoned warriors do not hunt bikes overtaking high-speed boats on the water: despite the fact that the project was embodied in metal, the cars never entered service with the Soviet army. The people who created the unique apparatus and brought it to their senses are almost gone.


Employees of the Vympel design bureau (at that time, the Volgobaltsudoproekt design bureau) and the Navashinsky shipbuilding plant, now deserved engineers, and then young designers and mechanics, told us about the device of the sea-speed tank landing craft of the 80 project. We obtained the technical data in the once-secret archives of the Vimpel design bureau. Only one question remained unanswered: who and for what purposes needed a hydrofoil tank, able to overtake any moving object on the water?

Transformer pontoon

This question could be addressed to Colonel Murgalev, who was the technical task and was the first military curator of the project. Pavel Mikhailovich Murgalev - a legendary person. It was he who invented the mine trawl for the T-34 tank, which was put into service in the 1942 year and went through the entire Second World War. The TK for a high-speed tank landing craft provided for the ability to quickly take on the T-54 tank (later T-55), speed above 50 km / h and high seaworthiness, in particular, the ability to move in waves to five points. An important and perhaps the most difficult requirement was the ability to fire directly from the water.

The development of the craft began at the end of the 1950s. A tank pontoon equipped with its own engine and hydrofoil was designed at the Volgobaltsudoproekt design bureau under the direction of Mikhail Shchukin. The wings were developed at the Central Design Bureau for hydrofoil vessels of the Krasnoye Sormovo plant (now the Central Design Bureau for the SEC named after RE Alekseev) - in the same place where the high-speed motor ships Rocket and Meteor were born. The unit also received the engine from the "Rocket" - the diesel M-50, capable of developing peak power 1200 hp.

Hydrofoil Tank: The Famous Soviet Project

Sea speed tank amphibious craft "project 80"

A set of high-speed tank landing craft consisted of two boats. Like ordinary non-motorized pontoons, they were mounted on the sides of the tank, equipped with special eyes. Each boat had two hydraulic cylinders, with the help of which the boats were raised above the ground. In this position, the tank entered the water to a certain precipitation.

In the transport position, the hydrofoils on the boats were raised and rather resembled the wings of a racing car. The tie-wings in front and behind the tank were raised and pressed to the board. Upon reaching the displacement position, the halves of the buckles were lowered and latched, forming rigid transverse crossbars at the level of the bottom of the craft. Thanks to the screeds, the boats could carry the tank without diverging to the sides. In the next instant, the hydraulic cylinders were already raising the tank above the water level and the pontoons began to displace.

The propeller and steering column of the boat were combined with the rear hydrofoil, so the depth of the propeller could be adjusted. The watercraft departed to a depth in the displacement position, then the hydrofoils dropped completely. The transverse screeds, submerged even in a displacing position, also had a wing profile and helped the boats to rise above the water surface.

It is important that the attachment of boats to the tank, and the closing of the wing-screed took place with the help of hydraulics and did not require manual labor. The complete acquisition of the craft before launching the water took 45 minutes, and the tank could get rid of the pontoons, coming ashore, in just a minute 3.


On the boats of the “80 project”, low-fledged hydrofoils of Rostislav Alekseev's construction were installed. They provide high hydrodynamic quality and low draft, and therefore - high speed. The main drawback of such wings is that they are contraindicated for strong agitation.

Life just a moment

By 1966, a model of hydrofoil boats on the scale of 1: 2, which was tested on the modest river Teshe, was made at Navashino Shipyard. And next year, a full-sized prototype went to the big water - in Sevastopol. “The crew of each car was small, only two people — the driver and the mechanic,” says the leading specialist of the Navashinsky plant, Valentin Borisovich Galin, “and one driver could control both his own boat and the watercraft as a whole. Steering and engines were controlled by electric motors and synchronized via cable. ”

On the water, the watercraft of the “80 project” immediately exceeded the design speed, speeding up to 58 km / h. But with the strength of the design problems. During one of the tests the screed broke. Boats parted, and the tank went under water. By that time, the device had not yet had time to go deep, so neither the crew nor the tank itself was damaged. To investigate the incident, a group of specialists from Volgobaltsudoproekt was sent to Sevastopol. “We stuck a lot of sensors on the tie-wings, fixed them with epoxy resin, connected them to the control equipment in a specially installed wheelhouse and went to sea,” says Pavel Semenovich Karpov, who worked as a designer of the 1 category in the strength sector. “As a result, we managed to find out that in the zone of maximum stress concentration on the wing there was a propylene groove, which became the cause of the rupture.”

Not quite smooth and it was with seaworthiness. Yes, the apparatus could move through the water with an excitement of up to five points, but only in a displacement position, with a corresponding low speed. Float on the hydrofoil could float at the excitement of not more than three points. When trying to storm the turbulent sea in full swing, the pontoons literally dived into the wave. The water got into the air intakes of the engines, and the diesels stalled. As a rule, after stopping the engines could quickly start again. During one of the tests, the lives of the crew members of the pontoon were threatened: the air intake hatch closed and the engine quickly began to evacuate the air from the interior. Fortunately, the mechanic guessed it in time to cut off the fuel supply and shut off the engine.


In the transport position, underwater wings, steering columns, propeller and tie-wings rose up. On land, the hydraulic cylinders lifted the boat above the ground, allowing the tank to move

The task, which initially could be considered impossible, was firing from the water. The tank sight for this type of shooting is not designed. Shooting from a moving ship at coastal targets requires completely different guidance systems and stabilizing devices. The shock wave generated during the shot exerts a tremendous dynamic load on the nodes of the pontoons themselves and on the mechanisms of fastening them to the tank. Needless to say about the threat to the health of the crews of unfortified aluminum boats ...

It should be noted that such impressive shots of the PT-76 tanks emerging from the hold of the amphibious assault ship are just a spectacular window dressing: the shooting is idle with reduced by more than half the powder charges. This is despite the fact that the caliber there is only 76 mm (against the 100 mm at the T-54 / 55), and the tank is initially floating. Still, shooting tests on the go as part of the “80 project” were carried out. Of course, they were not crowned with success.

The problem was the angular transmission of the drive shaft - the one that allowed the propeller to rise out of the water along with the hydrofoil. The complex knot could not withstand the loads, and every now and then it had to be redone. And yet the designers managed to bring the car to mind. At shipyards in Navashino, Rybinsk, Astrakhan, 13 sets of high-speed tank landing craft of the “80 project” were built. The experimental battalion of winged tanks was based in Sevastopol. It was rumored that some of the cars went to the Baltic. And in 1971, the project was closed. Why - none of our current consultants could answer. True, it is not difficult to guess.

Fly to the Bosphorus

The autonomy of the high-speed watercraft of the “80 project” was 350 km. 350 km by water is not at all the same as 350 km by road, at least for reasons of maritime navigation. A qualified navigator is vital for sea trips, and only the driver and the mechanic were placed on pontoon boats.

On the Black Sea, the days when the excitement does not exceed three points at a distance of 10 km from the coast, occur on the strength of three or four times a month. Therefore, the same "Rockets" and "Meteors" ply there only in the coastal zone. Taking into account the location of the experimental battalions, the floating facilities of the “80 project” were intended to quickly capture the shores of the Baltic straits and the Bosporus. And at the forefront was put not so much speed as the suddenness of the appearance of an unusual transport. In the case of the Bosphorus, tanks would have to overcome banks (shallow water lines running parallel to the coast at a distance of 5 − 10 km from it) and land on a rocky steep coast.

Ferry instead of tank

The boats of the “80 project” could be used in the configuration of a cargo ferry for transporting tanks that are not equipped with a special fastening system, as well as other land vehicles. For this purpose, a special cargo pontoon was attached to their hydraulic cylinders, on which a tank was installed across the course. In order to transport the vehicle could call on the ferry and leave it, four lifting tracks or two lifting ramps were provided. For lifting cargo, the steam was equipped with two crane beams.


In the technical data kindly provided by Vympel, the mass of boats of the “80 project” is modestly silent. With 350 km autonomy, the device must carry fuel for at least seven hours of travel. The engine of each pontoon develops power 1200 hp, whereas the ship “Comet” “horses” of all 900. Consequently, the fuel consumption of the “80 project” is greater than the kg / h 400 — on the order of kg / h 600. At seven o'clock it takes 2,8 − 3 tons of fuel in each boat. The ponton of the PMP fleet transported on the Kraz-255 weighs 8,5 tons. We venture to suggest that the boat of the “80 project” with fuel, engine, transmission and wings weighs no less than 15 tons. This is indirectly confirmed by the fact that it does not load onto the Kraz-255 , and towed on special trailer.

In order for a tank to carry two 15-ton boats, it must be fitted with mounting hardware, the weight of which, according to modest estimates, will be 2 − 5% of the mass of the tank itself. This is about a ton of dead metal, which the tank may need only once, but which it should carry with it always.



The suspension of the tank is not designed for such loads: it is believed that even the weight of the KMT-6 knife trawl (800 kg) leads to the rapid destruction of the front roller bearings. If the undercarriage is designed for the extra weight of the 30 − 40 t, then, freeing itself from ships after getting out of the water, the tank will have a too rigid suspension, which will lead to a complete loss of its shock-absorbing properties. The tank will not be able to move normally over land and fire.

The ground pressure of the tracks of the T-54 tank (T-55, T-62) is of the order of 0,78 kg / cm2. With suspended pontoons, it will increase to 1,5 − 1,8 kg / cm2. Tanks with the largest ground pressure in the world (German PzKpfw VI “Tiger”) with a pressure of just 1,04 kg / cm2 in the morning on 5 on July 1943 failed to attack, and waited for 8 hours at night softened up. If we take into account that the bottom soil near the coast does not differ in density and usually withstands a specific pressure of no more than 0,5 − 0,64 kg / cm2, then it is clear that, once at the coast, a tank with mounted boats cannot get out of the water.

No tank in the field

Yet the main problems of the “80 project” are tactical. The landing operation involves the simultaneous participation of several hundred or at least dozens of ships moving on a strict schedule. Tanks, infantry, artillery, sappers, and means of support should land in a certain order on the shore. By the time the battalion of the “80 project” approaches the coast, it should be covered with naval artillery fire. For conventional landing craft, this issue is solved simply - part of the artillery is on the landing craft themselves, part on the ships of the artillery support, which move along with the landing craft. And what about the "project 80"? Artillery support vessels will not be able to accompany such a battalion, since their speed is two to three times lower. It means that they should move to the place of landing earlier. And in this case, the very meaning of speeding the landing of tanks is lost: the enemy, having seen the ships of the artillery support, will be ready to meet the "winged tanks" with fire.

What are tanks without infantry, without artillery, without sappers, without ammunition? Ammunition is enough for 30 minutes of battle, if before that the tanks do not burn the enemy's grenade launchers. Perhaps the tank on a hydrofoil could have unexpectedly approached the combat zone as reinforcement, having landed a little distance away on the unguarded part of the coast. But, you see, this is a very modest role for such an ambitious project.

The creators of the "project-80" focused on solving one very narrow task - the creation of a watercraft capable of transporting a tank by water at high speed. They left out of sight many technical and tactical issues, which ultimately led to the collapse of the project. Of course, the war has its own laws. Nevertheless, the “80 project” is a stunningly elegant and perfect work of Soviet engineering, which, unfortunately, is destined to be forgotten. Together with the people who happened to see the boats with their own eyes, the cars themselves also die. The last "preserved" pontoon, or rather its body, is kept in a closed fund of the Museum of Armored Forces in Kubinka. With all the desire of the museum staff to restore it will not succeed: all attachments machines, including wings and screeds, irretrievably lost. After all, the boats of the “80 project” were made of high-quality and expensive aluminum.
Author:
Originator:
https://www.popmech.ru/weapon/10272-zhertvy-skorosti-tank-na-podvodnykh-krylyakh/
47 comments
Information
Dear reader, to leave comments on the publication, you must to register.

I have an account? Sign in

  1. Petrol cutter
    Petrol cutter 28 October 2017 08: 38 New
    +9
    As an experiment, of course, it’s interesting, but the whole article was tormented by the question why is this necessary? recourse
    1. Vadim Kurbatov
      Vadim Kurbatov 28 October 2017 08: 41 New
      +2
      Well, in principle, a very good development of the current to bring to mind and voila for the Marine Corps would be a good help in storming the coast
      1. Cat
        Cat 28 October 2017 09: 26 New
        +7
        The idea is good for solving highly specialized problems. If you fold the Bosporus, then hypothetically this is exactly what we lacked in 1943-1945 on the Black Sea and Baltic coasts. Regarding the resources of T-54 and 55, compare the weight of the first production samples of the late 40s and early 50s and mid 70s. The difference is 3-4 tons. For attachments, I believe that it could be made removable. Or quickly mounted. Because Once again, a similar delivery vehicle is necessary for one-time specialized landings. Well, the last, if the sea waves on our shores do not exceed 3 points, why the Turkish ones have something different.
        R.s. A bit of imagination. What could prevent advance advance of the fire support ships to the enemy’s shore, landing with light armored vehicles, aviation, and then pushing the pantons with tanks. Although hydrofoil boats have passed the century, we now have a hovercraft in service.
        Bison!
        1. Vadim Kurbatov
          Vadim Kurbatov 28 October 2017 09: 54 New
          0
          Well, the Bison is already bigger than the same tanks with pantons and the sound of it is not so good, as well as to release tanks with pantons for the Marine Corps in advance in order to occupy and expand the area for landing from bison and heavier armored vehicles
          1. Monarchist
            Monarchist 28 October 2017 12: 04 New
            +3
            In my opinion, it’s like this: the idea is tempting, but again to speed up.
            In the fantasy order: the landing craft are concentrated in advance in a certain place and the minute-to-minute declaration of war is the landing troops and immediately these tanks. But in this case, you can do without them: to keep BT on their head in transport vessels along with the landing
            1. Vadim Kurbatov
              Vadim Kurbatov 28 October 2017 12: 30 New
              +5
              well, the usa had shermans DD and showed themselves quite well, but they had a big minus
          2. Petrol cutter
            Petrol cutter 29 October 2017 19: 22 New
            +1
            "pantons and the sound of him wow and release tanks in advance with pantons for the Marine Corps,"
            Noise, yes, a lot from him, but how again! When he goes to the front, there is no particular noise. Rings are not in vain on the screws are actually. They perform many functions. Here we must pay tribute to our wise Soviet designers, who wise thoughts inflicted on paper open spaces! When he comes out to the "running gears" howl stands, Mama don’t cry, but when he goes with his nose to the coast, silence stands however.
        2. Petrol cutter
          Petrol cutter 28 October 2017 18: 59 New
          +3
          Yes, this is the “Bison” “in the photo, anchor to me in ..! It’s worth it in my workshop. Every day I admire him. All covered with dust, absolutely all ...
    2. Mister X
      Mister X 29 October 2017 12: 28 New
      0
      As I looked at the photo, I remembered that I had already seen the technique on exactly the same wings. In parallel with the development of a tank pontoon "project 80" - work was carried out on the creation and light amphibians on hydrofoils. The task was carried out: to create for the needs of the army a subcompact, all-wheel drive, two-medium vehicle.

      NAMI-055B (4x4) In 1958, work began on the theme "High-speed hydrofoil amphibious vehicle". The machine was developed at NAMI, the project was headed by Khlebnikov Alexander Mikhailovich. The work was carried out jointly with the same TsKB on vessels on hydrofoil "Red Sormovo". The design of the amphibian wings NAMI-055В (4х4) is identical to that installed on the pontoon of the "80 project". In 1963, the car was built and the tests that took place on the Volga began. On NAMI-055В with the engine from Tatra 603 a / m it was possible to achieve on wings the maximum speed of 55-58 km / h.





      Amphibian was difficult and difficult, had low permeability in the coastal strip, besides, the process of re-equipment was too long and time consuming, incompatible with military regulations. The NAMI-055V project was not developed, but it still retains the status of the world's first and only light army amphibian on hydrofoils.

      GAZ-46G A year later, at the Gorky Automobile Plant, lead designer Vladislav Yemelyanov tried to develop the idea for us. The basis was taken floating car GAZ-46, known as the "MAV" (Small Water Car). The experimental GAZ-46G also installed a two-winged winged-winged-winged-winged stabilizer circuit with submerged uncontrolled hydrofoil. On the GAZ-46G with the engine from Chaika (195 hp), it was possible to reach 16 km / h in the displaced position, and on the wings only 30 km / h. The GAZ-46G project has not left the experimental stage.







      Video in the subject. Cars in uniform, amphibious hydrofoil.
    3. medvedron
      medvedron 30 October 2017 22: 47 New
      +1
      So in the article there is an answer, for a specific operation.
  2. Golovan Jack
    Golovan Jack 28 October 2017 09: 04 New
    14
    We crossed the hedgehog with snake ... the barbed wire did not work out, the project was closed.
    But in general, as I imagine a tank that is cross-country in such a

    rides a dummy - I don’t even know whether to laugh or cry.
    The sleep of reason gives birth to monsters, yeah request
    1. Cat
      Cat 28 October 2017 09: 37 New
      +1
      Technological progress is interesting in itself!
      The beast, on the contrary, is a "torpedo boat with caterpillars" in Italian.
      1. Golovan Jack
        Golovan Jack 28 October 2017 09: 46 New
        +7
        Quote: Kotischa
        Monster on the contrary "torpedo boat with tracks" in Italian

        Both of them ... monsters laughing
        Quote: Kotischa
        Technological progress is interesting in itself!

        Here at point blank range I see no progress. They would have added a plane there, well, just, "so that it was" wink
        1. Skay
          Skay 28 October 2017 12: 57 New
          +9
          They would have added a plane there

          Sure, not a problem!
          1. serg.shishkov2015
            serg.shishkov2015 29 October 2017 10: 34 New
            0
            it's not him, the A-40 based on the T-60, but here is some kind of Christie like BT-2 and it accelerated on take-off on its tracks
      2. serg.shishkov2015
        serg.shishkov2015 29 October 2017 10: 30 New
        0
        Grillo was created to solve a specific problem, he performed it, at least in the harbor through the boom crawled on the tracks
    2. Lopatov
      Lopatov 28 October 2017 09: 56 New
      +4
      Quote: Golovan Jack
      how can I imagine a tank that crosses in such a body kit

      So he did not have to ride the intersection in this form. Moved into the water in a base. On the spot after going ashore he threw the pontoons into battle. And only at the stage of capture and retention of the bridgehead on the shore
      1. jjj
        jjj 28 October 2017 13: 10 New
        +2
        As I understand it, on the pepelats stood two m-50, To deliver the 1 tank across the lake. For such a speed is unnecessary for crossing the river, and there is not enough fuel to go on wings through the sea. A completely unnecessary project
      2. Krasnodar
        Krasnodar 28 October 2017 13: 16 New
        +1
        Quote: Spade
        Quote: Golovan Jack
        how can I imagine a tank that crosses in such a body kit

        So he did not have to ride the intersection in this form. Moved into the water in a base. On the spot after going ashore he threw the pontoons into battle. And only at the stage of capture and retention of the bridgehead on the shore

        And you can thus enter the tank group about 20 kilometers from the main bridgehead of the landing and voila ... unexpected ... tanks work on the rear with air support
    3. Vanek
      Vanek 6 August 2018 11: 45 New
      0
      Quote: Golovan Jack
      which is the intersection in such a

      dodger rides


      They put it on their shore, took the ford, removed it on the enemy shore.

      The purpose of this know-how is DELIVERY.

      Novel hi
  3. vnord
    vnord 28 October 2017 09: 28 New
    +2
    A few years ago there was a more detailed article on this site. And this system was deployed in the Crimea.
    The unit was intended to capture the Black Sea straits. Just do not remember how much ..
    1. Krasnodar
      Krasnodar 28 October 2017 13: 17 New
      +1
      Will they cross the Lamansh? )))
  4. vnord
    vnord 28 October 2017 09: 31 New
    +2
    [quote = Golovan Jack] The hedgehog was crossed with a snake ... the barbed wire didn’t work out, the project was closed. But in general, as I imagine a tank that’s riding in such a dodger, I don’t even know whether to laugh or cry. Sleep of Reason gives birth to monsters, huh [/ quote

    And, funny, the tank is underweight and should not move along the intersection. . The task was to attach a body kit, to get under its own power from the Crimea to the Bosphorus, when they go ashore, throw them off ...
    1. Cat
      Cat 28 October 2017 09: 39 New
      +1
      I agree, the end justifies the means!
      Moreover, the funds - for a highly specialized purpose!
    2. Golovan Jack
      Golovan Jack 28 October 2017 09: 44 New
      +7
      Quote: vnord
      The task was to attach a body kit, to get under its own power from the Crimea to the Bosphorus ...

      Well, so am I about the same thing ...
      Or do you think that throughout the route there will be a smooth concrete, densely strewn with roses (from the grateful population, huh)?
      The project is crazy initially. Now everyone would yell - "cut !!!", and then it was just ... it was stupidity, in short.
      PS: the tanks were "closely seen", even closer and longer than desired. What they can (and what can not), in Courses yes
      1. Lopatov
        Lopatov 28 October 2017 09: 57 New
        0
        Quote: Golovan Jack
        Well, so am I about the same thing ...
        Or do you think that throughout the route there will be a smooth concrete, densely strewn with roses (from the grateful population, huh)?

        Throughout the route, the sea.
        1. Golovan Jack
          Golovan Jack 28 October 2017 10: 03 New
          +7
          Quote: Spade
          Throughout the route, the sea.

          Right I didn’t notice the elephant:
          Quote: vnord
          to get under its own power from the Crimea to the Bosphorus, when going ashore.

          You know, this is even more nonsense than by land ... where to refuel, what to do in a storm, and those and those ...
          Okay. Read, sing, dance ... and the project is all the same crazy, IMHO request
          1. Lopatov
            Lopatov 28 October 2017 10: 30 New
            +2
            Quote: Golovan Jack
            where to refuel, what to do in a storm, and those and those ...

            As far as I understand, there should have been enough fuel to throw in one direction. Yes, and the landing operation in the storm is an unrealistic thing, not only for "super-floating" tanks

            Quote: Golovan Jack
            and the project is all the same crazy

            You are trying to consider the project as a universal tool. And this is wrong.
            It was a highly specialized tool, “sharpened” for specific landing operations.
            Could the “super-floating” tanks qualitatively strengthen the first wave of the landing intended to capture and hold the Black Sea and Baltic straits? I think yes.
  5. faiver
    faiver 28 October 2017 09: 38 New
    +4
    Well, in general, everything is as always - the engineering solution is interesting, but in isolation from the realities of life ..., the tanks landed, and the marine corps, apparently on eagles or civil meteors, should have come up, and apparently everything had to cover the "lun" just not with mosquitoes and with hail systems hi
  6. Settlement Oparyshev
    Settlement Oparyshev 28 October 2017 11: 59 New
    0
    This project is garbage. Fresh to you: a shell is made. A tank drives into it. Then it hits a water with a bulldozer. A tank with a shaft is mounted on a propeller and rushes to the beach. There it flies ashore, shells are dumped and the tank breaks into attack. Cheaper and more effective.
    1. AFHENOGEN
      AFHENOGEN 28 October 2017 18: 36 New
      +2
      Quote: pp to Oparyshev
      This project is garbage. Fresh to you: a shell is made. A tank drives into it. Then it hits a water with a bulldozer. A tank with a shaft is mounted on a propeller and rushes to the beach. There it flies ashore, shells are dumped and the tank breaks into attack. Cheaper and more effective.

      Are you a maggot association, and then a fly will fly out?
  7. Monarchist
    Monarchist 28 October 2017 12: 22 New
    +3
    Sergey, thank you for the interesting project for the story. As a child, someone said that now there are tanks that floats on the sea, and on the shore floats dropped and attack. I was small, but tried to imagine how technically? It seemed to me that the driver should sit on the tower and turn the helm. I really wanted to see how he sits on the tower under a tarpaulin visor so that the rain does not wet and turns the helm. For some reason, it seemed to me that he should have a wooden chair,
  8. Old26
    Old26 28 October 2017 13: 31 New
    +2
    Quote: Benzorez
    As an experiment, of course, it’s interesting, but the whole article was tormented by the question why is this necessary? recourse

    Me too. Effectively, originally, but no more. For example, I did not understand the whole tank loading scheme. Okay, the watercraft on the sides rise, but to what depth should the tank call in order to stand on the platform, and then, when the pontoons go down, rise above the water.

    Quote: Vadim Kurbatov
    Well, in principle, a very good development of the current to bring to mind and voila for the Marine Corps would be a good help in storming the coast

    In conditions of absolute calm and in the complete absence of coastal defense
    1. Vadim Kurbatov
      Vadim Kurbatov 28 October 2017 14: 09 New
      0
      And with the presence of the defense of norms, it will be especially in order to quickly occupy the bridgehead
  9. polpot
    polpot 28 October 2017 14: 21 New
    0
    The dream of the Lamans and the Bosphorus straits gave birth to such projects, thank God, the series did not go. PT 76 was enough
  10. Eight
    Eight 28 October 2017 14: 41 New
    +2
    “In the technical data kindly provided by Vympel Design Bureau, the mass of boats of the“ Project 80 ”is modestly silent.”
    "A set of watercraft had a mass of 22 tons, a width of 10,7 m and a length of 16,3 m. A tank landing craft provided movement afloat with sea waves up to 3 points on hydrofoils and up to 6 points in a displacement position."
    "The autonomy of navigation was 400 km. The maximum hydrofoil speed reached 60 km / h, in the displacement position - 16 km / h. In both driving modes, the ability to fire from the tank was provided. The maximum angle of entry into the water was 15 °, the angle exit 13 ° "
    (.http: //zonwar.ru/news/news_55_Proekt-80.html)
    If anyone is interested in other boats for armored vehicles - http://bastion-karpenko.ru/plavsredstva_bt/
    1. AFHENOGEN
      AFHENOGEN 28 October 2017 18: 41 New
      +2
      Quote: Eight
      “In the technical data kindly provided by Vympel Design Bureau, the mass of boats of the“ Project 80 ”is modestly silent.”
      "A set of watercraft had a mass of 22 tons, a width of 10,7 m and a length of 16,3 m. A tank landing craft provided movement afloat with sea waves up to 3 points on hydrofoils and up to 6 points in a displacement position."
      "The autonomy of navigation was 400 km. The maximum hydrofoil speed reached 60 km / h, in the displacement position - 16 km / h. In both driving modes, the ability to fire from the tank was provided. The maximum angle of entry into the water was 15 °, the angle exit 13 ° "
      (.http: //zonwar.ru/news/news_55_Proekt-80.html)
      If anyone is interested in other boats for armored vehicles - http://bastion-karpenko.ru/plavsredstva_bt/

      Briefly and clearly, otherwise they divorced the search!
  11. Doliva63
    Doliva63 28 October 2017 18: 41 New
    +4
    Well, damn it, the engineers were - any "whim" could translate into reality! In the 70s, I remember, some old house in Leningrad was transported to a new place overnight - the neighbors in the morning o..panareli laughing
    1. polpot
      polpot 28 October 2017 19: 15 New
      +1
      In Moscow, even in the 30s, this was very widely dealt with even by the comedy “Shumi Gorodok” was shot on this subject in the late 30s.
    2. ZVO
      ZVO 30 October 2017 20: 04 New
      0
      Quote: Doliva63
      Well, damn it, the engineers were - any "whim" could translate into reality! In the 70s, I remember, some old house in Leningrad was transported to a new place overnight - the neighbors in the morning o..panareli laughing


      You're lying. Yes, do not lie.
      In order to “transport” the house overnight, they would tear it from the foundation for 2-3 months with so much equipment. that the neighbors were resettled ...
      Look how they expanded Tverskaya ...
  12. Bormanxnumx
    Bormanxnumx 28 October 2017 19: 43 New
    0
    It should be noted that such impressive shots of the PT-76 tanks floating out of the hold of the landing ship are just spectacular window dressing: they are fired at idle with powder charges reduced by more than half. This despite the fact that the caliber there is only 76 mm (against 100 mm for the T-54/55), and the tank is initially floating.

    If my memory serves me right, the PT-76 tank was originally designed with the possibility of firing afloat and there were no problems with this.
  13. rumpeljschtizhen
    rumpeljschtizhen 29 October 2017 01: 55 New
    0
    Yes, the grandmother did not consider any phantasmogoric development
  14. sxfRipper
    sxfRipper 29 October 2017 02: 23 New
    0
    Dyrenkov with his surrogate tanks nervously smokes on the sidelines ... And on the other hand - how much something new has appeared))) Glory to the Lefthander!
  15. xomaNN
    xomaNN 29 October 2017 22: 02 New
    0
    Such a technique could be developed and spent money only for the state program from the military. Here is the question: What strategic or tactical task was laid in such a development ???
  16. abc_alex
    abc_alex 30 October 2017 03: 27 New
    0
    A task that could initially be considered impossible is firing from the water. Tank sight for this nature of firing is not designed. Shooting from a moving ship at coastal targets requires completely different guidance systems and stabilizing devices. The shock wave generated during the firing exerts an enormous dynamic load on the nodes of the pontoons themselves and on the mechanisms of their fastening to the tank. Is it worth talking about the threat to the health of crews of unfastened aluminum boats ...


    Hmm ... But modern tanks are equipped with gun stabilizers and even target retention systems. The SLA of a modern tank allows him to shoot on the go. In theory, maybe afloat. :) The problem of dynamic loads during shooting remains, of course, but shooting is already possible! :)
    Since the 50s, how much has been done and ships on a dynamic airspace and ekranoplan. Can such speed tank tugs really be made? :)
  17. fuch
    fuch 31 October 2017 11: 31 New
    0
    How to solve an engineering problem is interesting. Although I would choose something poorer than a tank, BMD or something. Disposable pontoons quickly flew to the enemy shore, shot the pontoons, then under their own power. A full-fledged tank when capturing a bridgehead is somehow not very needed.
  18. Larum
    Larum 16 March 2018 13: 13 New
    +1
    Shitty written. Who is famous if no one knows?