How planes were taught to shoot through the propeller

56

The First World War gave an unprecedented impetus to military science. Man in his ability to kill other people has never been equal. The war only confirmed this thesis. Having started a conflict with rather primitive aircraft, which often did not carry any weapons at all and performed mainly reconnaissance tasks, the military and industry very quickly withdrew Aviation to a whole new level.

In the first air battles, aviators often fired at each other with revolvers and pistols, while the battles literally took place at pistol-shot distance. However, already in 1914, the first synchronizers were presented, which made it possible to fire through a rotating propeller without the danger of damaging it. In 1915, the first synchronizers appeared on combat aircraft. First in French, and then in German.



The appearance of the first synchronizers


In fact, the question of how planes shoot through a rotating propeller and do not shoot off their blades has popped up in almost every person's head at some point. Almost everyone who was interested in aviation in the pre-jet era was looking for an answer to this question. At the same time, interest in the topic was fueled by a large number of military-themed films, which continue to be filmed to this day.

How planes were taught to shoot through the propeller

The answer to the question that torments people just getting acquainted with the world of aviation is the "synchronizer". This is the name of the mechanism invented during the First World War. The synchronizer itself was a device that allowed the pilot to fire through the area that was thrown by the aircraft's propeller, without the danger of damage to the propeller by bullets, and then by shells.

The appearance of such a device was dictated by the very development of aviation and the experience of the very first air battles. At first, when the planes were planned to be used only for reconnaissance and adjusting artillery fire, there were no particular problems, and the pilots really did manage with personal weapons... But the concept of the use of aviation changed rapidly already in the course of hostilities.

Soon, turrets with a machine gun or machine guns that could shoot above the propeller began to appear on planes. Separately, it was possible to distinguish models with a pusher propeller, which did not interfere with firing directly along the course. At the same time, the technology for placing weapons in the wing of the aircraft simply did not exist at that time. There were no remote control systems either.


Roland Garosse, photo 1910

A turret with a machine gun, of course, made life easier in battle, but it allowed fire only in the rear hemisphere, excluding the frontal zone, which is most relevant for all fighters. The first solutions to the problem with directional shooting through a rotating propeller were proposed as early as 1913-1914. It is believed that the first such devices were proposed by the Swiss engineer Franz Schneider and the French Saulnier.

Already during the war, the idea of ​​Saulnier was developed by the French pilot, athlete and hero of the First World War Roland Garosse. Today this name is familiar to people even as far as possible from aviation. It is in his honor that the tennis tournament is named - one of the four Grand Slam tournaments held in Paris.

The device, designed and implemented by Roland Gaross, rightfully marked the birth of a fighter aircraft in the classical sense of the term. Gaross proposed a "cutter" or "deflector" of bullets. The system was as simple and utilitarian as possible, but it allowed shooting through a rotating propeller. Visually, it consisted of metal corners, which were fixed at the base of the propeller blades so that the bullets, when hit, would ricochet into an area safe for the aircraft and the pilot.

The design had its drawbacks. About 7-10 percent of the bullets were lost like this, hitting the reflectors. At the same time, the propeller added weight, the load on the engine increased, which led to premature failure. The effective power of the propeller also dropped by 10 percent. But all these shortcomings were compensated by the possibility of firing along the course of the aircraft.


The propeller with reflectors, which the Germans removed from the plane of Garossa

In February 1915 at the disposal of sous-lieutenant Roland Garros was given a single "Moran Parasol", which received a new system with cutters on the propeller blades. Already on April 1 of the same year, the innovation showed itself in all its glory. At an altitude of a thousand meters, the pilot shot down a German reconnaissance aircraft "Albatross", and then in a short time won a number of aerial victories.

Fokker's Beach


On the morning of April 18, 1915, Garossus made an emergency landing in German-occupied territory and was captured. Before the arrival of German soldiers, he managed to set fire to his plane, but he was not completely destroyed. The Germans were given the opportunity to study the French propeller-firing device. It quickly became clear that the chrome-plated German bullets carried both the reflectors and the propeller, in contrast to the copper French bullets.

In any case, the Germans did not copy the French development. At the same time, work on the creation of synchronizers was carried out in many European countries even before the start of the war. Germany was no exception. The mechanical synchronizer was invented for the Germans by the Dutch aircraft designer Anton Fokker. He equipped them with a Fokker EI reconnaissance fighter.

The aircraft was a bracing monoplane, a further modification of the Fokker M5K reconnaissance aircraft, which, in turn, was created on the basis of the French airplane Moran Saulnier G. The main difference from both the M5K model and the French aircraft was a synchronized machine gun.


The first production fighter with a mechanical synchronizer Fokker EI

Fokker EI - became the first full-fledged production fighter capable of firing through propeller blades. In air battles, this gave the German pilots a strong advantage over the Allied fighters, who had less convenient machine guns. By the end of the summer of 1915, the superiority of the Germans in the air had become absolute. The British press even came up with the name "Fokker Beach" for the new German aircraft, which reflected the heavy losses that the British Air Force had suffered in the battles with the Germans.

Due to the appearance of a mechanical synchronizer, the new German fighter was dangerous even for French armed fighters, including models with a pusher propeller. Even with a machine gun on board, such vehicles lacked the protection of the rear hemisphere. German pilots, who went to the tail of French aircraft, shot the enemy with impunity, hitting the engine.

The simplest Fokker device provided the Germans with complete superiority in the skies until the spring of 1916, when one of the aircraft made an emergency landing in French-occupied territory. The British and French quickly copied the device and were able to fight the Germans on equal terms.

Fokker mechanical synchronizer device


Fokker's mechanical synchronizer made it possible to link the firing of the machine gun with the rotational speed of the propeller. The design was reliable and simple and settled in the aircraft industry for a long time. Fokker linked the trigger to the rotor thrust, allowing the bullets to fly past the rotating blades. In fact, he presented a simple and elegant cam mechanism, which once per rotation "turned off" the trigger at the moment when the propeller blades were at a certain point.

The designer installed a disc with a protrusion on the rotating part of the engine. When rotating, this cam moved the thrust, which was associated with the trigger mechanism of the machine gun. Each time a shot was fired immediately after the blades passed in front of the machine gun barrel. So Fokker solved two main problems: ensured the safety of the propeller and achieved a high rate of fire. Although the rate of fire here directly depended on the engine speed.


Fokker Synchronizer


Synchronizer device. From 40 seconds, you can clearly see how the synchronizer cam works

The synchronizer definitely required fine tuning after installation on the aircraft, but it was so successful that it completely changed the course of the air war, becoming a role model for many years. Later, by the beginning of World War II, more advanced electronic synchronizers appeared on fighters, which made it possible to increase the rate of fire.

At the same time, even by that time, there could be problems with synchronizers. For example, they appeared on the Soviet MiG-3 fighter, which began arriving en masse in units just before the start of the Great Patriotic War. Failures of synchronizers in 1941 happened on this model quite often, which led to the shooting of the propeller blades with large-caliber bullets. At high flight speeds, such a defect could lead to the loss of the aircraft and the death of the pilot.

Synchronizers were completely abandoned only after the transition from propeller-driven aircraft to jet aircraft, when these devices lost their relevance. This happened already in the 1950s.
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56 comments
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  1. +2
    April 21 2021 18: 15
    I heard about such a device, but I didn't know how it worked.
    The video shows everything very clearly.
    Thank you
  2. -2
    April 21 2021 18: 43
    And in World War II, only the USSR and Germany were able to use synchronizers in large quantities, all the others had a too low rate of fire when firing. And they used wing armament, which was inferior in accuracy to the course.
    It is worth noting that as soon as the propeller was removed (switched to reagents), everyone began to use only forward-firing weapons for firing.
    1. +5
      April 21 2021 20: 25
      The point is not only that the propeller was removed, but also in the engines, which moved from the nose to the wings or behind the cockpit, making room for weapons. Course armament in the form of suspended containers under the wings continued (and continues) to be used on jet aircraft.
    2. +9
      April 21 2021 20: 38
      On "Cobras" there were synchronous M2 .50, so they knew synchronizers in America, and knew how to use them. Another thing is that synchronous machine guns were poorly combined with American air-cooled engines, so it was easier and safer to carry them into the wings.
      1. +1
        April 21 2021 21: 16
        On the aircobra, this problem was irrelevant, there the engine was behind the pilot, and there was a place for the cannon in front
        1. +3
          April 21 2021 21: 49
          But synchronous 12,7 mm machine guns (position 4) were also there:
          1. +3
            April 21 2021 21: 53
            It is clear, there was a lot of empty space ahead
      2. +2
        April 22 2021 19: 08
        Well, how to say, on the la-5 with an air-cooled engine there was also a synchronizer, on the I-16 too)
  3. +8
    April 21 2021 18: 52
    Synchronizer failure is suspected as the cause of death of the famous German ace of the First World War Max Immelmann. Although the British attributed his shooting down to themselves, there is an opinion that he shot off one of the two propeller blades, and the resulting vibration from the unbalanced propeller literally broke the plane into small components in a matter of seconds. According to the testimony of his wingman, a few seconds after opening fire on the enemy, the plane shook for no obvious reason, and first its tail fell off, and then its wings. Machine gun fire was hardly capable of inflicting such damage.
    The altitude was about 2000m, and the parachute was not included in the pilot's equipment at that time.
    1. +1
      April 21 2021 19: 28
      I did not know about this version, as the death of the British from the fire was deposited in my memory, the guy at 25 was unlucky.
      1. +2
        April 21 2021 20: 21
        Quote: Andrey Korotkov
        I did not know about this version, as the death of the British from the fire was deposited in my memory, the guy at 25 was unlucky.

        Well, in theory, of course, the British could have shot the propeller too, but it looks more like a synchronizer failure.
        Alas, parachutes were used much later.
        1. +1
          April 21 2021 20: 28
          Versions differ, especially since he did not make his last flight on his plane, engine defect (repair), an English bullet like a propeller, the version about the synchronizer was rejected like the fact that the battle was almost over
    2. 0
      April 24 2021 23: 17
      The destruction of wooden propellers in the air was then a relatively frequent phenomenon, usually not leading to the complete destruction of the aircraft. But the cross through the strut led to the fact that the airplane flew normally for some time, but when performing a maneuver with an overload, it was destroyed.
  4. +7
    April 21 2021 19: 02
    The example of the MiG does not mean that this problem did not exist in the air forces of other countries; blade shots occurred in everyone who used a synchronizer. By the way, the propellers of Soviet aircraft withstood the 20mm shell of the ShVAK cannon (mandatory). Since this is a mechanism, it must have an MTBF, respectively, those services, after a certain time, carried out routine maintenance. An interesting relationship between the rate of fire and the speed of the propeller - if the rate of fire of the weapon was greater than the number of revolutions in the same unit of time, then the rate of fire loss was minimal, especially in the zone of maximum revolutions. If the rate of fire of the weapon was less than the number of revolutions, then they (revolutions) "cut off" the rate of fire. For example, UBS 12,7mm rate of fire 1000v / m, in a synchronized version with the VK-105PF motor (Yaki, LaGGi), max 2700 rpm gave 2700: 3 (number of blades) = 900w / m (in real life up to 800w / m) ... Colt Browning M2 .50 rate of fire 750v / m in a synchronous version with the Allison engine (R-39) 3000rpm (combat mode) could give 1000v / m, but the rate of fire of the weapon did not allow, in real life up to 650v / m.
    P.S. In the literature so far, I have come across the spelling of the name of the inventor - Garro.
    1. 0
      April 22 2021 08: 03
      Quote: motorized infantryman
      For example, UBS 12,7mm rate of fire 1000v / m, in a synchronized version with the VK-105PF motor (Yaki, LaGGi), max 2700 rpm gave 2700: 3 (number of blades) = 900w / m (in real life up to 800w / m) ...

      Colleague, is this formula applicable to Gustav (Bf.109)? That is, we divide the number of revolutions of DB-605A (2800) by 3 blades, we get 933 rpm? But the duration of a salvo of paired MG-17s with a 500-round AP was 32.4 seconds. That, in general, corresponds to the nominal rate of fire of 1100 rpm. If I'm not mistaken in my calculations.
      1. +1
        April 22 2021 14: 57
        This formula applies to any aircraft, i.e. theoretically, at maximum speed, the MG-17's rate of fire made it possible to "fill" the propeller speed with shots. Another thing is that the rate of fire during synchronization, in reality, was always slightly lower. In your example, the firing duration should be at least 500: 933 = 0, 54m = 32.15 s
  5. +8
    April 21 2021 20: 24
    Dear author, to tell about the aircraft synchronizer and not even mention in passing (although he deserves more) Gheorghe Constantinescu and his witty hydraulic synchronizer ... this, you know, is not the order ((
    The British, up to WWII, equipped their Gloucesters Gladiators with it.
    1. +1
      April 21 2021 21: 59
      Synchronizer of the Scarf-Dibovsky system, proposed by Lieutenant of the RI Fleet Viktor Dibovsky (served in Britain as an attaché). Together with Warrant Officer Scarfe, it was modified and used on the Royal Naval Air Service aircraft built by Sopwich in 1916.
      1. +3
        April 21 2021 22: 06
        Quote: Bolt Cutter
        Synchronizer of the Scarf-Dibovsky system, proposed

        Oh yes, again. hi You cannot limit yourself in this topic to the names of Fokker and Garros.
    2. +3
      April 21 2021 22: 16
      Gheorghe Constantinescu and his ingenious hydraulic synchronizer
      Known as C.C Gear (Constantinesco-Colley), the hydraulic synchronizer was developed in conjunction with a British Army artillery major who, among other things, procured a Vickers machine gun and 1000 rounds of ammunition for testing. Everything worked well initially, the patent was filed on July 14, 1916. But there were failures - it turned out that they were caused by the poor quality of the cartridges - the primers gave a delay, albeit small, but sufficient to upset the operation of the system. The system was further refined with an engineer from Alperton Walther Haddon and in November 1917 was made standard and put into production. The system's key advantage is compatibility with any aircraft engine.
      1. +2
        April 21 2021 22: 29
        Sikorsky S-16 was originally built with Lavrov's mechanical synchronizer. It took off in February 1915 (thus becoming one of the first aircraft with a firing synchronizer), but due to the lack of imported motors (it was necessary to put 80 hp instead of the design 100), it was built in a small series of 18 copies.
      2. +2
        April 21 2021 22: 47
        https://www.reddit.com/r/mechanical_gifs/comments/ml25k8/constantinescocolley_synchronization_gear_that/
        The Constantinesco-Colley system worked like this Yes
  6. -12
    April 21 2021 20: 29
    The author also forgot to mention the machine gun / cannon built into the engine crankshaft, to which the propeller was attached ...
    1. +14
      April 21 2021 20: 42
      Quote: Xlor
      The author also forgot to mention the machine gun / cannon built into the engine crankshaft, to which the propeller was attached ...

      Nothing was built into the crankshaft, and in principle could not. The cannon was placed in the camber of the engine cylinders, and it fired through the hollow secondary shaft of the gearbox. It has nothing to do with synchronizers.
      1. -7
        April 22 2021 18: 45
        Can you explain what "camber of the engine cylinders" and "hollow secondary shaft of the gearbox" are? You are probably a humanitarian?
    2. 0
      April 21 2021 22: 08
      Quote: Xlor
      The author also forgot to mention the machine gun / cannon built into the engine crankshaft, to which the propeller was attached ...

      laughing laughing Where are you from? Did your parents take you from kindergarten for a long time? Traffic jams?
      1. -4
        April 22 2021 18: 46
        Traffic jams in your head ...
        It will be more true
  7. +5
    April 21 2021 21: 16
    Setting up the synchronizer using a stencil in January 41st on Messerschmitt Bf109E
  8. +9
    April 21 2021 21: 38
    Later, by the beginning of World War II, more advanced fighters appeared on fighters. electronic synchronizers

    The author clearly got excited. Electric, yes, they appeared, but there were no electronic ones.
    1. +2
      April 21 2021 22: 28
      Quote: Undecim
      The author clearly got excited. Electric, yes, they appeared, but there were no electronic ones.

      Sorry, Viktor Nikolayevich, it's been a hard day, I fiddled with the port vigno from old stocks ...
      Suffered slightly .... sorry)

  9. The comment was deleted.
  10. +5
    April 22 2021 04: 16
    the technology of placing weapons in the wing of an aircraft at that time simply did not exist. Not in the wing? But it was on the wing!


    There were no remote control systems either.
    How was it not? And this ...!

    And there was such a thing!
    1. 0
      April 22 2021 08: 21
      But it was on the wing!

      Vickers on the wing of Newport is a song)) I was surprised - why not remove the casing from it? There are no problems with cooling. And the weight will decrease again. I especially like tape feeders)
      Quote: Nikolaevich I
      And there was such a thing!

      What is that ... On the Newpors-10 of the 7th AO of the First Army, maxims were put on the hood at an angle of 24 degrees. for shooting over the screw disk... Inventor V.V. Jordan. That is, the Russian pilot in the attack must always be behind and below the attacked one? For the basics of Böhlke's tactics (from the sun from above) is such an installation of weapons useless?
  11. +2
    April 22 2021 07: 10
    It quickly became clear that the chrome-plated German bullets carried both the reflectors and the propeller, in contrast to the copper French bullets.

    German bullets had a steel shell covered with cupronickel.
  12. SNA
    +4
    April 22 2021 08: 11
    Quote: Xlor
    The author also forgot to mention the machine gun / cannon built into the engine crankshaft, to which the propeller was attached ...

    Oh, and the path of the projectile would be difficult ...
    1. +5
      April 22 2021 08: 28
      Quote: SN
      Quote: Xlor
      The author also forgot to mention the machine gun / cannon built into the engine crankshaft, to which the propeller was attached ...

      Oh, and the path of the projectile would be difficult ...

      laughing Exactly)
      1. -1
        April 22 2021 18: 49
        Do you actually know how the crankshaft works on an aircraft engine?
        And how is the propeller attached to it?
        Do you even know what a propeller is?
        1. +1
          April 23 2021 02: 35
          Quote: Xlor
          Do you actually know how the crankshaft works on an aircraft engine?
          And how is the propeller attached to it?
          Do you even know what a propeller is?

          V-shaped engine with one crank crankshaft for two opposing cylinders.
          This solution (one connecting rod journal for every two cylinders connecting rods) is standard for both 2-stroke and 4-stroke engines with any even number of cylinders. The camber angle of 90 ° is typical for 8-cylinder engines.
          wink I am not a pilot, but personally I do not like V-shaped internal combustion engines.

          In the longitudinal placement of the engine (along the axis of the aircraft fuselage), between the left and right engine blocks (camber angle), a cannon or machine gun was installed.


          When viewed from the front of the engine, the torque from the crankshaft by a gear drive (reducer) is transmitted to the hollow shaft of the propeller and the camshafts of the 2 cylinder head of the engine. The gear drive of the cylinder head is considered more reliable.
          The crankshaft of an aircraft engine is no different from other engines based on the principles of the crank mechanism and the piston group, converting the forward stroke of the connecting rod into the rotation of the crankshaft.
          1. -2
            April 23 2021 02: 48
            The aircraft are powered by radial (piston) engines.
            This means that the cylinders are located in a circle ...
            1. +1
              April 23 2021 03: 12
              Quote: Xlor
              The aircraft are powered by radial (piston) engines.
              This means that the cylinders are located in a circle ...

              Do you mean a rotating (rotary) motor? There are two types of them, the second is a star-shaped one with fixed cylinders and a crankcase, the crankshaft rotates.
              The first type was used in WWI. It seems like the WWII was no longer used. The second type of star-shaped internal combustion engine was developed ...
              You asked a question about laying the barrel of a weapon in the collapse of the engine when the conversation was about the V-shaped engine. I answered you.
              In a rotary cylinder, the engine crankcase rotates, the propeller shaft rotates, the crankshaft is stationary.
              Do you think it is possible to extend the barrel of a weapon through the crankshaft of such an engine? wink
              1. -2
                April 23 2021 07: 03
                In the "non-elbow", straight part of the shaft, you can easily install the barrel of any machine. And they did.
                PS In a radial engine, the cylinders are located around the circumference and they are motionless. During my youth, I worked as an engineer at the AN-2 in agricultural aviation and serviced just such an engine ...
                1. -1
                  April 23 2021 07: 07
                  Show examples, airplane model, how to install.
                  1. -2
                    April 23 2021 07: 12
                    I can't find the engine diagram exactly in the angle we need. But I assure you that any engineer (or a team of engineers) will solve the problem of how to embed a barrel into a rotating shaft. The question is purely technical
                    1. -1
                      April 23 2021 07: 29
                      Honestly, I haven’t come across such engines. But let's say the rotary engine was single-row. Let's take a projection of a rotary engine:

                      Simply put, the connecting rods of the following cylinders are attached to the lower head of the connecting rod of the first cylinder. The central axis is not through, crank like a crankshaft. How to stretch the barrel from the breech to the screw through such a crankshaft? In my opinion, it will be the same if you put a stick in the wheel of a bicycle on the go ... The cranks will break off.
                      On another radial engine, which can be multi-row, it is possible to lay the barrel in the collapse of the cylinders, but the air-cooled engine, the barrel is still between the cylinders, is it necessary ?!
                      1. -4
                        April 23 2021 08: 44
                        The fact that the barrel is located directly in the engine shaft, I either read somewhere or we were told at the military department at the institute.
                        In any case, this issue is solved, even by making the design heavier and more complex. But anyway, it will be easier than the solution associated with installing a synchronizer
                      2. -1
                        April 23 2021 09: 44
                        Which shaft?
                        I was interested in the topic. Didn't find such examples. Whatever one may say (crankshaft), but regardless of the types of engines according to the arrangement of the cylinders, it is impossible to place the barrel longitudinally in the crankshaft.
                        On the contrary, synchronizers (electrical or mechanical) were the simplest solution. In addition, remember the transmission from the crankshaft, the mechanical drive of the ignition distributor shaft, the fuel pump. The synchronizer works in the same way. It's like setting the ignition when the spark is supplied to the spark plug at TDC, there is also an impulse to the trigger in the intervals of rotation of the blade at the top point.
                        Even in rotary piston engines (they remind me of radial engines), an eccentric shaft acts as a crankshaft, the bends of which will not allow drawing a straight line from its beginning to the shank.
                        There was a case, a friend offered to exchange at the beginning of zero with him the key in the key for his Mazda Enios. I changed my mind. And then there was a consultation with friends at the service station during the analysis of the engine (rotary piston).
                      3. -4
                        April 23 2021 11: 52
                        I quote myself: "In the non-elbow, straight part of the shaft."
                        On which the propeller is attached.
                        It can be made to any length ...
                      4. +1
                        April 23 2021 12: 50
                        Quote: Xlor
                        I quote myself: "Into the non-elbow, straight part of the shaft."
                        On which the propeller is attached.
                        It can be made to any length ...

                        What does it mean in the non-crankshaft? Can you imagine the crankshaft? The barrel should go from the shank (breech of the weapon) to the nose of the shaft, put the crankshaft down and draw a straight line! In the place where the trunk line will pass, the lower head of the connecting rod will rotate ...
                        That's it, I've had enough. Sorry, I'm tired. sad Give an example of placing the barrel of a weapon through the crankshaft of a star-shaped internal combustion engine of a fighter, I will take off my hat.
                      5. 0
                        April 24 2021 18: 45
                        Everything is very simple. I will resolve your dispute. The magic word REDUCTOR. It was the gearbox that allowed the installation of the weapon on the axis of rotation of the screw.
                      6. +1
                        April 24 2021 21: 24
                        Quote: Dim124
                        Everything is very simple. I will resolve your dispute. The magic word REDUCTOR. It was the gearbox that allowed the installation of the weapon on the axis of rotation of the screw.

                        Thank you! Yes I wrote in a previous comment:
                        Quote: Lynx2000

                        When viewed from the front of the engine, the torque from the crankshaft by a gear drive (reducer) is transmitted to the hollow shaft of the propeller and the camshafts of the 2 cylinder head of the engine. The gear drive of the cylinder head is considered more reliable.

                        Xlor wrote about installing the barrel of the weapon in the crankshaft ... I replied that it was impossible.
                      7. 0
                        April 27 2021 07: 47
                        Quote: Lynx2000
                        Quote: Dim124
                        Everything is very simple. I will resolve your dispute. The magic word REDUCTOR. It was the gearbox that allowed the installation of the weapon on the axis of rotation of the screw.

                        Thank you! Yes I wrote in a previous comment:
                        Quote: Lynx2000

                        When viewed from the front of the engine, the torque from the crankshaft by a gear drive (reducer) is transmitted to the hollow shaft of the propeller and the camshafts of the 2 cylinder head of the engine. The gear drive of the cylinder head is considered more reliable.

                        Xlor wrote about installing the barrel of the weapon in the crankshaft ... I replied that it was impossible.

                        Not into the crankshaft, but through the hollow shaft of the propeller
                      8. +2
                        April 27 2021 07: 54
                        Quote: Pilat2009

                        Not into the crankshaft, but through the hollow shaft of the propeller

                        Yes No. My opponent argued about the placement of the barrel in the crankshaft in a dispute, believing that since the shaft (meaning the rotary engine) is directly connected to the propeller, then the barrel will be centered.
                        I objected, considering it impossible. hi
                        I also wrote to my opponent above for the gearbox of the drive to the propeller shaft and timing on the cylinder head with barrel centering through the camber of the cylinder blocks with output through the cavity of the propeller shaft ...
                      9. +1
                        April 27 2021 18: 23
                        "Into the non-elbow, straight part of the shaft."

                        In V-shaped internal combustion engines, the gun was placed in the camber of the cylinders in the gearbox shaft!
                        In an in-line engine (AM-35, 37), you can't put a cannon and a machine gun.
                    2. -1
                      April 27 2021 18: 17
                      The question is purely technical

                      Oh how! And how to push the gun into the propeller shaft into the ASh-62? And how did they get FOUR guns on La-9 ???
                2. +1
                  April 27 2021 17: 40
                  This is a twist .... Nobody did this. A very original way to break machine guns. And engines.
  13. 0
    1 May 2021 00: 46
    Judging by the picture and video, the cams interrupting the drive should have exactly the same number of propeller blades, but synchronizing discs with one cam are shown ...
  14. -1
    6 July 2021 08: 06
    Why does the cylinder block rotate with the propeller? Wrong layout ...

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