Isn't it time for us to take a swing at our classic - BM-21 "Grad"
It's time
It has become a good tradition in our country to hold grandiose parades in honor of significant dates and festive anniversaries with the display of legendary weapons involved in certain events. We also saw cavalry carts with "Maxims", harnessed by four snow-white thoroughbred stallions, and the legendary Tanks T-34 in impeccable technical condition, and, of course, restored replicas or copies of the Katyushas sung by the people.
And then, after the words of the announcer: “The heirs of the military glory of the Guards rocket mortars of the Great Patriotic War, the modern Grad multiple launch rocket systems, to the applause and enthusiastic cries of the public, leave the most recognizable and formidable BM-21. Only now the sluggish progress of the NMD in Ukraine makes one critically doubt their modernity and power.
System weapons, adopted for service back in 1963, is quite capable of meeting its century in the troops. But the army needs a weapon system for modern warfare, not just for ceremonial parades.
I will express a purely personal opinion in the theses that need to be criticized in order to offer and substantiate my point of view, to rethink the topic raised for the benefit of the army and the country:
- Redundancy for the Armed Forces of one country of the presence of three calibers of multiple launch rocket systems.
- Primitive MLRS "Grad" at the level of weapons of the Second World War.
- The defenselessness of the wheeled chassis of the MLRS "Grad" from being hit by any type of weapon.
- Low power and range of 122-mm ammunition and a narrow niche for combat use.
- Outdated automobile chassis with a gasoline engine MLRS "Hurricane".
- High vulnerability of existing reactive munitions from modern military air defense.
Caliber
Well, I'll start with the simplest of the complex and accessible and controversial to everyone - the choice of caliber for the new "Grad" or "Tornado-G".
It is proposed to increase the caliber of the MLRS from 122 mm to 130 mm (it is unlikely that there will be supporters of a reduction ... although ...).
The most uncomplicated high-explosive fragmentation projectile 9M22 (length (Dl) 2 mm; mass (M) of the projectile 870 kg; warhead mass 66 kg; maximum firing range (D) 18,4 km; further characteristics will be given in the same sequence with abbreviations) is the same age as the system itself and was developed specifically for it.
After decades and development along an extensive path, it came to the emergence of a new analogue - a high-explosive fragmentation projectile 9M522 with a detachable warhead (Dl 3 mm; M 037 kg; M warhead 70 kg; D 25 km). We must pay tribute to the designers and industrialists, we see a real increase in the main characteristics, but at the same time it should be noted that the new projectile already exceeds the length of the existing guide tube equal to 37,5 millimeters. And this means that the modernization potential of the existing system in caliber 3 mm is completely exhausted.
Perhaps, in the future, you can try to lengthen the guide pipes by 200-300 mm in order to achieve another increase in performance by 5-10 percent? But pay attention to the following fact: the ratio of the length of the projectile to the caliber already reaches 23,5 and 24,9, respectively. Still, we are talking about rocket artillery, but barreled artillery, and it is very difficult to imagine a three-meter projectile in the barrel of the Gvozdika self-propelled guns of the same caliber. And what is the longitudinal stiffness of projectiles with a similar elongation in flight at supersonic speeds with rotation?
122-mm unguided rocket 9M522 with a detachable high-explosive fragmentation warhead.
Why the new caliber 130mm?
Firstly, this is not know-how, the named caliber has long been used in naval artillery systems on ships and coastal troops.
Secondly, for economic reasons and logistics. The unhurried manufacture by the industry of a package of guides in a caliber of 130 mm and the same length of 3 meters will not cause technological problems, will not require new equipment and tooling. For army operators, the MLRS in the new caliber, while maintaining the main overall length of 3 meters, will not require the replacement of the main carriers / chassis or the revision of the organizational and staffing structure of units and subunits.
Thirdly, it becomes possible to use the real advantages of the bicaliber system. By installing on the old existing 122-mm projectiles, the stocks of which are considerable in arsenals, two or three polymer belts only 4 mm thick, by analogy with guide belts on projectiles for rifled guns, we get the opportunity to fire from 130mm caliber guides. The second variant of bicaliberity can be assumed to be used for boosters in a new caliber of warheads from previously released ammunition.
Here you should pay attention to one nuance.
When developing ammunition for a new caliber system, an obligatory requirement must be adopted to separate the head of the projectile from the upper stage that has performed its function in flight. The fact is that modern military air defense is already quite successfully coping with the task of intercepting Tochka-U ballistic missiles used on the Ukrainian front, ammunition from MLRS and HIMARS of 227 mm caliber and a flight speed of 2,5 M.
This means that the existing radars as part of the air defense system and the counter-battery radar are quite confident in detecting and tracking such objects with the ensuing consequences. And in the near future, laser combat systems on the battlefield are on the way.
In existing MLRS ammunition, a jet booster engine occupies from half to two thirds of the length of the projectile, and, as a rule, various wings, stabilizers or guides are attached to it. Having fulfilled its function of accelerating the ammunition after the burnout of the powder charge, all this “economy” becomes a factor that increases the effective scattering surface for electromagnetic waves of radar pulses, which leads to an increase in the probability of detection.
In addition, having accelerated the warhead to maximum speed, the idle hollow powder engine with stabilizers becomes a braking element from the oncoming air flow and an additional factor in flight destabilization from the effects of lateral wind loads, thereby reducing the possible flight range of the warhead and hit accuracy.
From the point of view of the radar, a free-falling powder engine separated from the warhead becomes an additional passive interference, doubling the number of targets detected and tracked, which can lead to overloading the information capabilities of the radar equipment.
I suppose that, perhaps, there will be supporters of a more significant increase in caliber, and of course, only from good intentions. Here's a look at the mentioned authoritative American opponents of a larger caliber with six and twelve shells in a volley. They, most likely, have grown into the category of carriers of high-precision guided missiles with the corresponding prices for ammunition.
The increase in the linear size of the caliber by only 8 millimeters in percentage terms is even less - only 6,5%. But the increase in the cross section of the ammunition and, accordingly, the volume increases by 13,5%. This will allow a creative approach to the choice of either increasing the flight range or the power of the ammunition, and in any case will facilitate the creation of more effective cluster and guided warheads. And finally, to confirm the correctness of the chosen argumentation, there is a well-known example from the not so distant past.
Quote from Wikipedia:
And further:
To summarize: first, a radical increase in the length of the barrel, and yet, in wartime conditions, a radical increase in caliber by 9 millimeters (11,5%). Both conditions have been fulfilled by fate: new ammunition of the old caliber is already sticking out of the guides, and the tenth month of full-scale hostilities in the country is in the yard ...
Chassis
Still, tradition is a great thing! As soon as the Guards rocket launcher appeared in 1941 on the chassis of a conventional ZIS-6 off-road truck and later on the Lend-Lease Studebaker, the new generation was destined to ride for 60 years first on the Ural-375 gasoline rogue and on this day on the diesel "Ural-4320". Simple, cheap and cheerful! The advantages of the system as a whole were appreciated by the Germans, who understand something in a real war, created their own LARS-1 and upgraded it into LARS-2.
The Americans, as always, not understanding the depth and elegance inherent in the masterpiece, decided to surprise and win everyone due to high technologies in their MLRS / HIMARS, and forced everyone to buy them. But both of them did the right thing - they booked the cabs of trucks, at least from light small arms.
I foresee objections like: MLRS will not go in the attacking formations of units and will not even take a place in the first or second line of trenches on the defensive.
The special operation that began in Ukraine showed that the vast length of the front line is permeable to the DRG, in the liberated areas the appearance of “rebels from the OUN-UPA” is possible, and the mining of territories with the help of mines of the “Petal” type prohibited by conventions is shown to us on TV. All these are real threats to life for the crews and for the combat units themselves based on trucks in the rear zone of our troops.
Therefore, the author chose as a chassis for the new 130 mm MLRS on the MT-LB VMK conveyor.
Where a burst from a 5,45 / 5,56 / 7,62 mm machine gun pierces through the Ural cabin, the sloping armor of the conveyor will save the lives of the crew and the engine of the vehicle. If the Ural runs into the aforementioned Petal, then no centralized inflation system will save the wheel torn to shreds, it will have to be changed here and now.
I will assume that the conveyor in this situation will retain mobility. And even when meeting with a pickup-cart, the presence of armor and a machine gun on the conveyor equalizes the chances of opponents. To the advantage of the conveyor in protection, you need to add a low silhouette in comparison with the truck (the height on the roof of the tower is 1 mm versus 890 mm for the Ural).
The author is convinced from personal experience that the Ural's cross-country ability on virgin snow is higher than that of the three-bridge KamAZ, but inferior to the tracked ATS-59. I hope that the tracked MT-LB VMK will surpass in cross-country ability any wheeled chassis capable of carrying a MLRS launcher. Still, the caterpillar transporter is an all-terrain vehicle, and the car will still remain an all-terrain vehicle.
The idea of MLRS based on the MT-LB is not new, here are a couple of drawings from the Soviet era. And there was even a real project for their production in sunny fraternal Bulgaria ...
Please note that in both figures, the designers provided additional supports lowered, most likely by hydraulics, to stabilize the system during firing, we do not observe anything like this on the Grad / Tornado-G wheeled chassis.
To stop the same problem on a modern MLRS tracked vehicle, it is proposed to use a more elegant solution that works on a heavy class combat vehicle.
The transition of the MLRS to a tracked chassis solves not only the problems of protecting crews and equipment and increasing mobility on the battlefield and cross-country ability, the aspect of unifying weapons in general for the army and solving the logistics problems of specific units is no less important.
Here is a far from complete list of equipment only for Russian artillery based on the specified transporter:
- 1L219M "Zoo-1M" - radar reconnaissance and fire control system;
- 1RL239 "Lynx" - artillery reconnaissance station ARK-1;
- 1V12 "Machine-C" - a set of fire control automation tools (KSAUO) for self-propelled artillery "Machine-C", includes four artillery fire control vehicles:
1V13 - the car of the senior officer of the battery KSAUO 1V12,
1V14 - KSAUO 1V12 battery commander's vehicle,
1V15 - the car of the division commander KSAUO 1V12,
1V16 - the car of the chief of staff of the KSAUO 1V12 division.
- 1V12-3 "Machine-M" - a set of fire control automation tools (KSAUO) for self-propelled artillery;
- 1V12M-3 "Falcet-M" - a set of fire control automation equipment (KSAUO) for self-propelled artillery;
- 1V181 "Ring-2" - a set of fire control automation equipment (KSAUO) for artillery, includes two vehicles:
1V185 - unified command and observation vehicle,
1V186 - unified command and staff vehicle.
- 1V197 - a set of fire control automation equipment (KSAUO) for self-propelled artillery.
On the basis of the MT-LB transporter, for more than twenty years in three countries such a mass system as the self-propelled guns 2S1 Gvozdika has been produced, which is still in service with many countries. And the understanding of the importance of solving this triune task was embodied in the metal.
Considering this “product”, one gets the impression that it was hastily assembled, as they say, on their knees in a garage cooperative, they took a standard chassis and added a finished MLRS. Neither the designer on Louboutins, nor the military representative with operational experience, nor the junior researcher with fresh knowledge of the sopromat participated in the throes of creativity. It is possible that this is a 9P139 combat vehicle of the Soviet Grad-1 system; photographs of the TZM 9T451 based on the MT-LB from this system could not be found.
The new MLRS-130/30 based on the MT-LB VMK seems to be more compact and harmonious. I will briefly express my wishes for the design, which are not reflected in the drawings.
First, the rejection of the amphibious qualities of the transporter. It makes no sense to cross the water barrier twice for the sake of a twenty-second volley. In the new 130-mm caliber, it is possible that the firing range will be increased to 50 kilometers and the presence of guided precision-guided munitions will make it possible to effectively fire at the enemy from one's own shore of a water barrier without visiting a cleared bridgehead.
In this sense, it will be much more important to be able to quickly reload from a transport-loading vehicle closer to the front line. In Belarus, this understanding came and was embodied in the creation of the TZM-122 based on the MT-LBu transporter for artillery units of the 122-mm Gvozdika self-propelled guns. Something similar is proposed for the new tracked MLRS.
Secondly, due to the increased constant load on the conveyor chassis, it makes sense to install a more powerful, shorter and lighter motor.
On the Web, you can find information about the staffing of the calculation of the MLRS "Grad" from two to six people. I will assume for the new tracked combat vehicle 130-mm MLRS a crew of four with a compact placement in front of the conveyor. In the aft compartment, behind the armor, there will be electric servo drives for the horizontal and vertical guidance system for the stack of barrels and hydraulics for stabilizing the hull by lowering the guide wheels.
The entire process of combat work from control of an autonomous machine-gun module to orientation, binding on the ground and opening fire must be carried out from the armored space of the cockpit. Probably, this will require a shift of the engine compartment towards the stern.
Possible error
In other words, it can be stated, summarizing, that the military leadership of our country made a mistake by relying on the modernization of the Smerch MLRS of a larger caliber.
The course of the special operation in Ukraine leaves no one in doubt about the importance of having a full-scale diverse space constellation of artificial Earth satellites for navigation, communications, intelligence, etc. tripod theodolite or compass in an open field.
But they are no longer surprised by the accuracy of the Hymars, the navigation of the Bayraktar, the presence of tactical communications from Starlink in the trenches of the Armed Forces of Ukraine. Against us, the UAF provides the United States and NATO with all these benefits and conveniences from the bounties and bells and whistles of their space infrastructure. As they say, our MLRS "Tornado-G" and "Tornado-S" with the introduction of satellite navigation and correction of the flight of shells do not graze the rear ones either.
Just do not forget that all these cosmic goodies and lotions are good when faced with a "potato" republic (bananas do not grow in Ukraine). In a conflict for which we are maintaining the Strategic Missile Forces, SSBNs, SA, all this may disappear at the very beginning, and perhaps even the day before. Then the big question will arise, where and how to shoot "Tornados" at a distance of 90-120 kilometers?
Another disadvantage of the large caliber.
For the sake of order, let me remind you of the characteristics of the 300-mm high-explosive fragmentation projectile 9M528 MLRS "Smerch" (Dl 7 600 mm; M 815 kg; M warhead 258 kg; D 90 km). In order to survive and win over the sea, anti-ship missiles comparable in mass, dimensions and speed must cling to the crests of the waves, hiding from ship radars. Comparable air-launched missiles have to be removed into the internal compartments of stealth fighters, as the main unmasking factor in front of an air enemy and ground-based air defense systems.
Commensurate "Zircon" and "Dagger" switched to hypersonic for survival. The main advantage of the MLRS, by definition, was considered the ability to release a "swarm" of shells in a short period of time -drones and retreat as soon as possible from a position from a likely retaliatory strike. But for modern air defense systems, such as the Pantsir-S1 and Tor-M2 with an ammunition load of 12 and 16 missiles, respectively, even a full salvo of twelve shells of 300-mm caliber and 7,6 meters long on a descending trajectory will not be something extraordinary.
Yes, at the turn of the century, the wheeled chassis of the Uragan MLRS was hopelessly outdated and did not fit into the harmonious logistic chains of army artillery units and formations. And there is no doubt that with due attention and approach to the modernization of the 220 mm caliber reactive system itself, in our time it would not be inferior in terms of range and accuracy to the 227 mm American counterpart.
The news about the possibility of bringing the firing range of heavy flamethrower systems of the same caliber to 120 kilometers can serve as weak consolation. But it's completely different storyas they say in the West.
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