After marrying Wang Fang, Lin Heping stayed in the factory for a while longer, but he couldn't bear it any longer. After all, he was a soldier, and his heart was with his comrades on the front lines. How could he stay here doing odd jobs?

However, when he returned to the army, he found that the unit had already been withdrawn from the front lines and was resting in the rear. Now, there was nothing much for them to do. It wasn't as interesting as being with Qin Yang, who always found new things to do.

Sure enough, he wasn't disappointed. A few days after returning, Qin Yang had given him an important task, and he had been busy with it for the past few days.

At this moment, all the preparations were complete, and only the final step remained.

The people around Lin Heping had been transferred from the tank unit with the coordination of higher authorities to help him. Now, from their perspective, they could see very clearly: behind a small hill below, lay the key to this operation!

A switch, soon to begin!

Due to the angle, Qin Yang and the others standing in the distance couldn't see what was behind the hill at all. At this moment, watching the tractor chassis move towards the hillside, some of those who knew the inside story were nervous, but Qin Yang remained calm and composed, talking to Christopher.

"Your tractor engine's gearbox uses a hydraulic torque converter, which has a torque amplification effect, so climbing hills should be easier, right?"

"Of course. Using our engine to drive that chassis, you can climb all the way to the top of the mountain. Your tanks probably can only climb halfway up."

He shielded his eyes from the sun to look at the tank, which had just moved behind a hill and temporarily disappeared from their view.

It was too far away to hear the engine sound, and they could only see plumes of black smoke coming from the engine.

Only in the era of electronically controlled engines would there be no black smoke. A basic operation for driving a tank now is to get in the car and floor the accelerator all the way, without worrying about damaging the engine. The accelerator is meant to be stepped on!

Therefore, no matter which country's tank it is, it leaves a trail of black smoke wherever it goes.

The next moment, the tracked chassis emerged from behind the hill again and continued to move rapidly up the hillside.

It's just that the time seems to be a little longer, as if it suddenly slowed down behind the hill, but Christopher was talking to Qin Yang the whole time and didn't notice this slight change.

Was it successful?

Zhu Lao didn't come, waiting in the 201 Institute to respond to any situation. Zhang Baozhong came along, and his eyes were full of anticipation. When he looked at Qin Yang, Qin Yang still looked indifferent and continued to communicate with Christopher.

"The processing requirements for this kind of gearbox are quite high, right?"

"That's right. Your precision machining is at least twenty years behind, so don't even think about imitating it. It's best to import ours. Oh, why is there a small red flag over there?"

Christopher's gaze turned to the hillside where the tank had been driving, where there was a place with a small red flag on the side.

"Oh, that's an unexploded dud left over from our live ammunition target practice a few days ago," Jiang Zhenguo introduced. "We originally planned to dispose of it today, but you were in a hurry to come for the test, so we put it aside for the time being. Do you want to stop now?"

Watching the tank pass a hundred meters away from the red flag, Christopher didn't take it seriously: "No, just pay attention to the site."

"The hydraulic torque converter gearbox is indeed good, but it has an inherent defect," Qin Yang continued, seemingly not paying attention to the red flag.

"Defect? How could there be a defect?" Christopher shook his head, expressing disbelief.

"Our ordinary gearboxes are rigidly connected. When we park on a slope, we not only have to pull the handbrake, but also put the gearbox in gear. Uphill in first gear, downhill in reverse, to prevent rolling. But the hydraulic torque converter is softly connected, so there's no way to use the gear to help with braking when needed."

"President Qin, you're talking about car operations. In a tank, this kind of operation isn't needed," Christopher said.

"The power seems to be insufficient!" Just then, someone frowned and said, "The tank is getting slower and slower going uphill."

A 1,200-horsepower engine driving a 20-ton tracked chassis is actually visibly slowing down? That's not scientific! It should be able to rush up this slope in one go!

Christopher also frowned: "Could it be improper operation by the driver? If it can't make it up this time, then replace him, I'll drive!"

As he spoke, he continued to look at the tank climbing the slope. Something was wrong. Why was the black smoke getting bigger and bigger? Wait, what's that?

Red flames were coming out of the engine compartment!

He was completely dumbfounded: "Not good, the engine compartment is on fire! Quick, quick, let the vehicle stop and put out the fire! Damn it, this is a diesel engine, how could it catch fire?"

You can't even light diesel fuel directly with an open flame. You need to pour the diesel on wood or rags, and then you can light it. It's completely different from gasoline, which catches fire easily. Diesel engine vehicles are very safe. Even in an accidental traffic accident, it's hard to catch fire.

But now, the engine compartment is on fire!

The driver had already noticed something was wrong. He stopped the vehicle and jumped out of the cab onto the hillside, carrying a red vehicle-mounted fire extinguisher in his hand, and bravely rushed towards the burning engine area.

Don't be afraid of fire, as long as it's put out in time, it's okay. The earlier it's discovered, the smaller the impact, except for electric cars.

From Qin Yang and the others' perspective, they could see everything clearly. A cloud of white powder surged towards the engine compartment, and the flames began to shrink at a visible rate.

If there is any flammable material nearby, it may catch fire.

Could it really be an engine compartment design issue, with the turbocharger baking something?

Just check it after returning. Anyway, the fire has been extinguished, and it doesn't seem to be a big loss.

"Not good, it's rolling back!" Just then, someone shouted.

The flames from the engine at the rear of the tractor chassis were gone, leaving only black smoke, but the tractor chassis began to roll back! It started to move backwards down the hillside. The driver threw down the fire extinguisher and tried to chase it, but the tractor chassis was rolling faster and faster. There was no way to catch up!

In the process of rolling backwards, one side of the track ran over something, and the chassis began to change direction, rolling straight towards the small red flag.

"Not good, if it runs over the unexploded dud, the consequences will be disastrous!"

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