Chapter 1996: Thunder came faintly in the clouds, instantly the heavenly disaster, the army was shocked

At this moment, the soldiers happily kicked open the standard grenade wooden boxes. Then they grabbed a few grenades with one hand, pulled the strings and smashed them downwards!

At an altitude of 100 meters, if the grenade falls down at a free fall speed, it will take about four or five seconds. So these soldiers smashed the grenade with force.

Just when the grenades that delay the fire tube for four to five seconds fell and exploded below, they either fell to the ground or exploded at a height of three to five meters above the ground!

Seeing the six soldiers carrying each of the six hot air balloons were all smashing grenades down frantically!

From a distance, the six hot air balloons lined up in a horizontal row. Small dots composed of grenades that fell from the air were densely arranged in a line.

When these grenades fell to the ground, they plowed out six broad seas of fire among the Mongolian soldiers below!

Although the damage caused by hot air balloons is extremely fierce, it is still much worse than the power of the previous cannon volley.

However, the shocking effect it brought was enough to cause the Mongolian soldiers below to suffer a collective mental breakdown!

Now they raised their heads like they were possessed, looking at the huge shadow in the sky, slowly approaching in their own direction.

A sea of ​​fire exploded in front of them, and it was getting closer and closer to them. But they could not move their steps because they were all scared!

...

Seeing these six hot air balloons emerge like gods, they burst into chaos when they appeared.

At this time, Shen Mo was standing on the deck of the traffic boat, and could not help but smile on his face.

...

If you still remember, this is not the first time the hot air balloon appears.

Long before Shen Mo was conquering Shuzhong, he used an experimental hot air balloon when he robbed Shuzhong tax silver at Liuhuayi.

In fact, since there was no weight underneath, the hot air balloon that time only needed to fill the heated hot air to make it fly in the air. However, the six hot air balloons that Shen Mo used this time were not that simple.

Because under each hot air balloon, there are four combat soldiers and two balloon controllers, and hundreds of kilograms of grenades.

Such load-bearing cannot be borne by a simple hot air balloon like a Kongming lantern.

...

Shen Mo's hot air balloon is made of silk produced in Tongzhou factory. In order to ensure airtightness, these silks are also coated with a layer of extremely thin vulcanized rubber.

The fabric of this hot air balloon is light and not breathable, and it is also very tough. The only disadvantage is that it is too expensive. Every inch of this large piece of white silk is made of silk!

At the same time, the power system on this hot air balloon is a blowtorch nozzle, which can fill the middle of the mouth of the hot air balloon with a large amount of hot air generated after combustion.

Since it is used for military purposes, these lamps and nozzles have been designed and finalized after repeated trials.

After that, the energy used on the hot air balloon was not gasoline and diesel made by the distilled gasoline process that Shen Mo had long mastered, but liquefied petroleum gas.

These liquefied petroleum gases are actually by-products produced when using crude oil to heat and distillate gasoline and diesel.

In fact, the main ingredients in it are high content of methane and propane.

In fact, collecting combustible gases such as methane and propane is not a very difficult task. The most difficult thing is to liquefy it. This process is very simple, just fill it into a pressure cylinder under high pressure.

So the next step involves the most difficult technical barrier to break through on the entire hot air balloon - the pressure vessel!

When liquefied petroleum gas becomes liquid under pressure, its volume can be reduced to one-tenth of the original 250th. That is to say, after it vaporizes again at normal pressure, it can become a combustible gas with a liquid volume multiplied by 250 times.

The calorific value generated by these liquefied gases has far exceeded that of gasoline and diesel, and even reached 1.\n3 to 1.\n5 times that of gasoline.

As for using it, it is very simple. Just release it from the pressure vessel through an adjustable nozzle and then ignite it with a kerosene lamp nozzle that always emits flames.

So the real difficulty is actually the pressure vessel. When it comes to how difficult it is to make this thing... it really made Shen Mo so distressed that his hair was about to be pulled out.

In fact, if you were to make such a pressure vessel in the future, even a small district-level factory would be able to do it, but nothing would be possible.

Because Shen Mo's power research and development is still in its early stages, it is even far from being able to drive an electric welding machine.

If there is no metal welding, the manufacturing of the pressure vessel will take a lot of effort!

Shen Mo was forced to use the method of forging steel to make the cylinder, and at the same time, he added three layers of sealed inner vessels made of copper to the cylinder, which made a pressure vessel that was thicker than ordinary gas tanks in later generations.

Even so, this kind of petroleum liquefied gas tank is actually only the thickness of a man's calves, and he can't make it even if it is thick. Now these cylinders are being placed bundles in the hanging basket of hot air balloons, and are connected together by intricate pipes.

To be honest, even Shen Mo was terrified when he was riding it into the sky while the hot air balloon was tested.

So when these hot air balloons appear, they certainly seem shocking, but only Shen Mo knows that they are not suitable for military use.

Rather than treating it as a weapon, Shen Mo regarded it as a propaganda material that shocked the enemy.

Whether it is to conquer the strong city or use it to sweep the enemy, the load capacity of this kind of hot air balloon is extremely limited. After more than a dozen boxes of grenades are thrown, these hot air balloons will lose their attack power.

And when it comes to being unsuitable for military use, the biggest reason is that these hot air balloons are simply uncontrollable.

Once it rises to the sky, which direction it floats depends entirely on what wind it blows!

Now, since the control soldiers on these hot air balloons do not have a precise air pressure gauge, they cannot accurately calculate the altitude they are at.
Chapter completed!