At this time, the fire demonstration house was filled with extremely high concentrations of water vapor and smoke, making it difficult for people to see what was going on inside. This blocked the fire brigade's progress.
"The dust and mist are so thick that you can't even see your fingers. I'm afraid it will be difficult to continue putting out the fire."
Seeing this situation, the ministers who were watching shook their heads.
Anyone who knows fire protection knowledge knows that at a fire scene where flames are raging, if firefighters rashly enter an area shrouded in a large amount of smoke, it is almost the same as sending death.
The first one is that because the line of sight is obscured by smoke, you cannot know what is going on inside, and any accident may happen.
Another is the smoke produced by fires, which is generally highly toxic.
You must know that there is no such thing as a gas mask in Daqin. The most you can do is wrap it with a piece of wet cloth. It is basically treating the symptoms but not the root cause. Once the smoke inhaled reaches a certain amount, it can range from fainting on the spot to asphyxiation in severe cases.
And died! It can be seen that the consequences are serious!
Therefore, almost everyone on the scene now thinks that this fire drill is about to end, and the prince finally stumbled here.
Ying Zheng also watched Ying Yu hesitate to speak, not knowing what to say.
However, Ying Yu still looked calm, not showing any signs of nervousness or disappointment because the fire brigade was blocked by smoke.
Just when everyone thought the drill was over, the fire brigade captain turned on another switch on the steam fire truck.
The positive pressure smoke exhaust fan was opened, and the strong wind instantly blew the smoke that filled the field into the house, and then was blown out from the other side of the house.
After repeating this cycle several times, the smoke began to become lighter and lighter, and the interior of the fire demonstration house quickly became clear.
"I didn't expect this steam fire truck to have such a function! No wonder His Royal Highness acted so calmly just now. It turned out that he was confident!"
Xiao He glanced at Ying Yu and suddenly understood.
But at the same time, his admiration for Ying Yu grew deeper. After all, only Ying Yu could design such an ingenious thing as a positive pressure exhaust fan.
"The steam fire truck you designed is indeed powerful. In addition to its powerful water power, it can also disperse smoke. No wonder you are so confident."
Ying Zheng also breathed a sigh of relief when he saw this, and a smile appeared at the corner of his mouth again.
"Father is so complimentary."
Ying Yu said modestly.
All this happened completely within his expectation.
Because after Ying Yu was handed over to the fire brigade members, they had practiced using the positive pressure smoke exhaust fan countless times, and now they are naturally comfortable doing it repeatedly.
At this time, the fire brigade had cleared all the flames from the ground floor of the fire demonstration house and sprayed foam to completely prevent the wood and hay from reigniting again.
The only thing left that has not been dealt with now is the double-storey attic above the house.
Due to the previous flames from the underlying building, the only staircase leading to the double-storey attic has been burned to black charcoal and is obviously no longer usable.
However, due to the high height of the double-story loft and the insufficient power of the auxiliary water cannon, the auxiliary water cannon was unable to spray water upwards, and naturally it was difficult to extinguish the flames above.
And even if it can spray to the first-floor attic, it cannot spray to the second-floor attic that is completely blocked by the first-floor attic.
At the same time, you have to remain extremely vigilant during this process, because under the constant raging of the flames, the attic without support may collapse at any time, which can almost be said to be dancing on the tip of a knife.
It is for this reason that double-story attics are generally considered to be the most difficult house structures to deal with in case of fire.
Seeing this scene, the emotions of the people watching were once again aroused.
However, since they were amazed by the positive pressure smoke exhaust fan, this time their eyes only looked forward to it. They were looking forward to the emergence of new features of the steam fire truck.
Sure enough, the double-story attic did not stop the fire brigade.
I saw a member of the fire brigade extending four cantilever brackets from the bottom of the steam fire truck, which stabilized the originally shaky body of the steam fire truck.
Immediately afterwards, a ladder made of hollow steel emerged from the steam fire truck. After being telescopically extended, its length soon exceeded the height of the attic, and was then mounted on the double-story attic from the outside.
This is also one of the designs of steam fire trucks, called fire ladders.
Under the power of a steam hydraulic machine, the hydraulic pressure will cause the piston rod to extend or retract. If the piston rod extends, the ladder will rise. If the piston rod retracts, the ladder will lower.
At the same time, gears are installed at the joints of the ladder, which can be used to move the ladder left and right, and adjust the position of the ladder according to various conditions at the fire scene.
This fire ladder is designed to deal with areas such as double-storey attics that lack access but are too high.
After solving the problem of entering the double-storey attic, the remaining things will naturally be much simpler.
The members of the fire brigade climbed up the stairs with their auxiliary water cannons, and basically repeated the actions of flushing water and covering them with foam.
In this way, the house structure, which is generally regarded as the most difficult fire to deal with, was easily solved by a flexible fire ladder.
When the last flame in the fire demonstration house dissipates, it declares that the fire drill has come to a successful end.
At this time, the crowd who had been watching, including the ministers, had been completely conquered by this powerful steam fire engine, or in other words, by Ying Yu!
"I didn't expect it to work. This steam fire truck is so powerful!"
"Yes, if it had been the previous water dragon, I'm afraid it would have been completely over the moment the smoke rose!"
"His Royal Highness the Crown Prince is definitely the reincarnation of a saint. Otherwise, how could he develop so many ingenious things? If it were placed in the past, we would not even be able to imagine it!"
"What nonsense are you talking about! What kind of reincarnation of a sage? With the achievements that our Crown Prince has made now, is there any sage in history who can compare with him?"
"Yes! His Royal Highness is clearly a living sage himself."