The mysterious double-barrel gun will become the next generation of self-propelled artillery of the Chinese Army.

The mysterious double-barrel gun will become the next generation of self-propelled artillery of the Chinese Army.

As the backbone of suppressing artillery in various countries, the 155 mm howitzer has never forgotten the ultimate goal of "lowering" the caliber of the unified barrel to suppress artillery. However, the 105 mm howitzer, which was obscured by the light of 155 mm howitzer, did not give up its efforts to prevent the fate of being merged by 155 mm howitzer.

The motivation of 155mm howitzer to "reduce" the uniform caliber is that 155mm howitzer is more powerful and has a longer range, while the biggest resistance of 155mm howitzer to "reduce" the uniform caliber is its heavy weight and poor maneuverability. The natural factor of suppressing artillery classification is that different levels of troops have different requirements for weapon maneuverability, and lower-level troops often do not.

Those who support "lowering" 155mm howitzers will exchange "giving up" on range for gains in maneuverability. For example, the NLOS-C indirect fire gun of the FCS system in the United States does not hesitate to exchange its weight with a gun with a shorter barrel of 38 times. Similarly, those who are opposed to "lowering" the155mm howitzer can try their best to make up for the lack of range and power of the105mm howitzer by sacrificing maneuverability within a reasonable range.

For example, the G7 105mm multi-purpose gun made by Daniel Company of South Africa, and the LAVIII-T7 light self-propelled howitzer based on LAVIII wheeled armored vehicle made by General Motors of the United States. The demand of G7 105 mm multi-purpose gun started after the wave of 155 mm ultra-light gun.

Although Daniel Company of South Africa is quite experienced in the 45 155mm gun, it is clearly aware that it is difficult to produce an ultra-light 155mm howitzer like M777 in a short time by relying on its own technical strength. Even without technical problems, it is difficult to go further than M777 in the international market. After all, the South African military industry at this time has lost the support of the local market and must grab food in the international market.

Therefore, Daniel Company of South Africa decided to avoid direct competition with M777 mm gun and introduce 105 mm multi-purpose gun in another way. From the specific design point of view, G7 is not so much the development of 105mm howitzer as the replacement of 155mm howitzer. In the design of G7, Daniel Company of South Africa applied its experience to a 52-tube 24-liter chamber155mm howitzer. In a sense, G7 is a scaled 155mm gun.

G7 105 mm multi-purpose gun adopts 52 times barrel, 12 liter large powder chamber, with initial velocity of 960m/s, range of drag-reducing Grenade of 24km and range of bottom-discharged projectile of 30km (m119105mm howitzer with initial velocity of 7 600.

In terms of shell power, by improving ammunition and using proximity fuze, the killing area equivalent to 155 shells was obtained. In the structural design of artillery, G7 still adopts the traditional artillery structure, and reduces the weight through integrated and lightweight design. In order to reduce the influence of recoil on the gun rack, G7 adopted muzzle brake with five times length, the same caliber and the same rifling.

The prototype gun of G7 weighs 3.8 tons, but Daniel has said that its ultimate goal is to reduce it to 2.5 tons. In addition, Daniel Company of South Africa made M23/24 dual-module propellant for G7, which consists of five drug numbers, using the achievements of 155 dual-module propellant. After the G7 multi-purpose artillery was launched, Daniel cooperated with GM to install it on LAVIII wheeled armored vehicle, and participated in the bidding of American EFEC project in the name of LAVIII T7.

The full name of EFEC is enhanced high-power entry artillery, which aims to provide powerful artillery for stryker Brigade of the United States. At that time, the Stryker Brigade in the United States had just begun to form, and M 198 was still a tractor gun. The requirements of American artillery bidding for EFEC project are that the range is more than 20 kilometers and the traction weight is not more than 1.8 tons.

Joining LAVIII T7 is v? c？ 105mm variable bore gun. The gun adopts 62 times barrel, 13 liter variable volume chamber, the maximum initial velocity is 975 m/s, and the range is 30 km. It is used to launch M9 13 rocket extended-range projectile.

Of course, it can also be used to launch drag-reducing grenades and bottom-discharged bombs developed by Daniel Company of South Africa for G7, with a range comparable to that of LAVIII T7. In order to reduce the development cost, the United Defense Company is in V? c？ The design makes extensive use of the existing achievements of the Crusaders. Its biggest selling points are 13 liter /8.2 liter variable chamber and M23 1/M232 dual-mode propellant, which is common with 155. The initial speed of the fifth gear can be changed by different combinations of two cavity volumes and three drug number modules.

The reason why variable rifling is adopted is that the muzzle velocity can be accurately controlled by different combinations of rifling volume and charge, and the rifling pressure of the gun is lower because of the optimal combination of rifling volume and charge.

Should I say LAVIII T7 and v? c？ It was very attractive to the US Army, but the Americans finally chose M777 ultralight 155mm howitzer for the light brigade. Of course, the M 1 19 type 105mm howitzers of other US troops have not been eliminated and have been in service until today.

About la viii, t7 and V? c？ Reasons for losing the election: First of all, Americans have high requirements for the quick response ability of Stryker Brigade, mainly relying on air transportation. Although Stryker armored vehicle is a wheeled chassis, it is more of a low-cost existence and does not need to rely on long-distance road raids. Therefore, it is not necessary for artillery to be equipped with "wheeled self-propelled".

Since Americans don't need the artillery of Stryker brigade to accompany them quickly, there is no problem to continue to use towed howitzers. If you really need a fast companion, anyway, Americans have enough CH-47s and MV-22s, even if M777 is heavier.

Secondly, EFEC's position is only the accompanying support artillery of Stryker Brigade (Transitional Brigade Combat Team), and its position in the future ground combat system of FCS at that time is naturally not as high as NLOS-C indirect fire artillery. So when the development of NLOS-C is on the right track, LAVIII T7 and V? c？ The meaning of existence is not great.

Compared with M777 tractor gun, LAVIIIT7 and V? c？ Maneuverability and higher firing rate can be used as highlights, but compared with NLOS-C, LAVIII T7, V? c？ Like NLOS-C, the firing rate is 10 rounds per minute. I believe that no matter what LAVIIIT7 GM can play, normal people will choose NLOS-C.

III. LAVIII T7 and V? c？ Compared with the M 1 19 type 105 mm gun, the performance is greatly improved, but it is not without slots. The ballistic performance of G7 gun is excellent, but its bore pressure is really scary. Excessive bore pressure is not conducive to the life of the barrel and the overall weight reduction of the gun. In addition, the G7 gun is equipped with a dual-module propellant that was only available when it was fashionable, but its significance is not as big as that of the 155mm gun.

The significance of dual-mode propellant is nothing more than saving propellant and realizing automatic filling. However, compared with the 105 mm howitzer with cartridge propellant, it can easily reach the firing rate of more than 8 rounds per minute because of its lighter ammunition. However, when changing to modular charging, the closed air of the cartridge case is lost during firing, so the wedge bolt with simple structure must be changed to spiral type first.

In this way, because the action of the bolt switch becomes complicated, it has a negative impact on the firing rate. Compared with v? c？ Things are much better. Variable cavity not only reduces the bore pressure, but also improves the accuracy. You can also use the same modular propellant as the 155 gun, but the firing rate can only wander around 10 rounds/minute anyway. When it faces the competition of NLOS-C with the same firing rate, it naturally has no good fruit to eat.

The development of the world is always unpredictable. M777 won, and NLOS-C became the hope of the whole village, but it was cut off by the US Department of Defense. LAVIII T7 and v? c？ Although it failed, it does not mean that the direction is wrong. 18 tons of LAVIII T7 will definitely not beat 20 tons of NOLS-C, but if the weight limit is relaxed to 25-30 tons, it will be a new situation.

Within the scope of 30 tons of self-weight, two 105 guns can be stuffed. You can imagine that the firing rate of the next 105 can be easily reduced to 10 rounds/minute, and the firing rate of those two 105 can be 20 rounds/minute. Such a high firing rate can completely make up for the lack of projectile power through more shells.

Of course, some people here will ask, what is the significance of having such a 105? In fact, in order to maximize the firing rate of 155 gun, a single-module propellant is necessary. If single-module propellant is used to take care of the maximum range, the minimum range must be sacrificed.

If there is a close-range gun barrel with excellent performance at this time, the effect will naturally be very good. It would be better if the propellants of 105 and 155 can be used universally through variable chamber design!