Genius is just the threshold for me!

Chapter 15: Complete Avionics System, Ready for Final Assembly

"A month is too long," Lin Dong said decisively.

His model aircraft is designed with two engines, each engine being a single-stage high-pressure turbine, for a total of two high-pressure turbine blades.

One high-pressure turbine takes a month, two turbines would take two months, and by the time the turbine blades are finished, summer vacation will be over.

"This would only require redesigning and reducing precision..." Zhang Yue proposed another solution: compromising the design to accommodate the manufacturing process.

"I'll do it."

Lin Dong disagreed with the plan: "Get me an NB95 mask, a file, and grinding tools of different grits. I'll handle the blades of these four high-pressure turbines. You'll assist me."

Because of age and safety concerns, Lin Weiliang doesn't allow him to play with machine tools and other processing equipment, but hand-operated equipment is definitely not included in this category. Zhang Yue's hand-operated solution today has given him an idea.

"You're here?"

Zhang Yue glanced at Lin Dong's elementary school arm, hesitated for a moment, and then brought out tools such as a file, sandpaper, a mini electric grinder, and a dial indicator.

Lin Dong put on his mask, took the file to the worktable, fixed the blade, which was more than ten centimeters long, to the clamp, and without saying a word, picked up the file and began to cut at a large angle.

呲!

A sharp metallic scraping sound rang out, and a small piece of metal was cut off.

"Dong Shen, what you've done..."

When Zhang Yue saw that Lin Dong hadn't even taken any measurements before starting to rub at such a large angle, his expression immediately changed.

It's important to know that small bypass turbofan engines have very high precision requirements for their high-pressure turbine blades. If they are overcut and even a tiny bit too much is removed, the entire blade will be scrapped.

If they discard even a few extra pieces of material, the entire model airplane will go bankrupt due to a lack of materials.

His original plan was to grind the turbine blades little by little and measure and calibrate them bit by bit, with the progress becoming slower and slower as the process progressed.

Each cut must be measured with a dial indicator against the drawing to ensure accuracy and prevent blade failure.

How could anyone be like Lin Dong, who doesn't even glance at the file or take any measurements before picking it up and cutting at a wide angle?

"Don't worry, I designed this thing. I can spot a dial indicator with just a glance."

Lin Dong responded calmly, his mind focused on the leaf in front of him, his hands moving continuously, cutting without stopping.

With the aid of his soul vision, every detail and every dimension of the leaf before him was clearly displayed in his mind.

The thickness of metal shavings cut off with each stroke of the file, and the consequences of each cut, were all reflected in his mind as if he had a premonition.

In less than a minute, Lin Dong quickly made more than forty cuts, leaving the rough-processed blade surface uneven and pitted.

"A grinder!"

Lin Dong handed the file to Zhang Yue and reached for the electric grinder.

呲——

Press the power switch, and the grinder will rotate rapidly under the drive of the motor.

Lin Dong gripped the grinder with both hands and pressed down, producing a harsh grinding sound as the grinder, inlaid with diamond particles, quickly smoothed out a protrusion on the blade.

"cool down!"

Lin Dong kept adjusting the angle and position of the grinding wheel, and calmly called out.

Zhang Yue hurriedly grabbed the coolant next to him and poured it on the material to remove the heat generated by friction and grinding, thus preventing the material from failing due to heat accumulation.

As the grinding head rotates, the originally uneven surface of the blades begins to become smooth, and the dimensions also approach the designed parameter values.

Two minutes later, Lin Dong switched to a larger grit grinding head. After some fine adjustments, the entire blade had a bright and shiny sheen, and there were special patterns on the surface similar to honing.

This is a pattern that Lin Dong figured out based on his knowledge of fluid mechanics and his spiritual visual perception.

Its function is to reduce gas adhesion loss on the blades, reduce the adhesion of impurities to the blades, and improve engine performance and lifespan.

According to Lin Dong's assessment, these patterns can improve engine life by about 4% to 5% and performance by 5% to 6%, which is a considerable amount for a low-bypass turbofan engine.

"Turbine, blade number 1."

Lin Dong touched the curved surface and texture of the leaf, and after confirming that there was no problem, he marked it with a marker and handed it to Zhang Yue next to him.

The vast majority of jet engines, whether it is the intake fan blades, compressor, or turbine, all adopt a split structure.

That is, dozens of different blades are installed on a bladed disk connected to a central shaft to form a complete impeller.

The blades and the blade disk are fixed with pins, leaving a certain amount of clearance, rather than being welded and rigidly fixed.

The advantage of this design is that it reduces the difficulty of processing. After all, the difficulty of processing individual blades first and then assembling them into an impeller is vastly different from processing the entire impeller at once.

Another feature is the presence of a clearance between the blades and the bladed disk, which reduces the resonance of the entire impeller and lowers the risk of engine disintegration.

"Is that all for this piece?"

Zhang Yue couldn't believe it when he took the blade and used a dial indicator to measure it. But no matter how he measured it, the values ​​he got were exactly the same as the design drawings.

This result completely stunned Zhang Yue.

In less than five minutes, the hand-rolling finishing process of a blade is completed.

So, if a high-pressure turbine has 68 blades, Lin Dong could complete it in less than half a day?

So where did he go wrong in estimating a one-month completion time?

"A small aero-engine, with blades less than 155mm long, how much effort can be put into it?"

Lin Dong urged, "Give me the second leaf."

"Dong Shen is awesome!"

Zhang Yue finally understood the difference between people, which was sometimes even greater than that between a person and a dog. He stopped questioning anything, took the second leaf, and handed it over.

In this situation, what else can be said but to just call Dong-shin yyds?

Time passed slowly.

As Lin Dong became more and more skilled at hand-rolling, his progress accelerated.

By the time the tenth blade is processed, the finishing time for each blade is reduced from five minutes to three minutes.

When Cai Wei returned at noon with the avionics module, the first high-pressure turbine's 68 blades were completely hand-made.

"The first aero-engine can be assembled now."

Lin Dong tossed aside his tools and instructed Zhang Yue, "Once the assembly is complete, have Wang Rui test the machine on the test bench to collect data. I'll finish the high-pressure turbine for the second aero-engine this afternoon."

Currently, there is only one general test version of the control program for aero-engines.

The official control program will only be able to be written by Lin Dong after the aero-engine assembly is completed and the actual operating data is collected.

However, Zhang Yue and Wang Rui could handle the assembly and data collection themselves, so he didn't need to do it personally.

"Eastern God!"

Cai Wei saw Lin Dong finish his work and come over with a large box on a trailer:

The DBS imaging Doppler pulse radar, photoelectric infrared sensor, communication module, positioning module, airspeed and barometer, low-light camera, high-speed camera, fly-by-wire flight control... all the avionics equipment is here.

When the goods were delivered, I measured them all.

The dimensions meet our requirements and can fit into the model airplane. The weight is also within acceptable limits. However, some internal support structures and the center of gravity balance require minor adjustments.

"Let me see."

Lin Dong picked up the equipment and examined it one by one.

Even the smaller version of this equipment costs over 300,000 yuan in total.

The bulk of these components are radar modules and photoelectric infrared sensors.

In 09, radar technology had not yet been disseminated to the general public, and civilian radar had not yet been widely adopted.

A military-grade Doppler high-performance radar using DBS imaging technology can easily cost six figures.

A single high-precision photoelectric infrared sensor costs fifty to sixty thousand yuan, and two of them together are enough to buy a house in some county towns at this time.

However, these are all essential components for a dogfighting model aircraft.

Without these, it's not a combat model aircraft; it's just a performance model aircraft.

Lin Dong originally planned to find some civilian-grade modules to replace them, so that he could get all the components for half the price.

But since Cai Wei has access to military equipment, he naturally won't be stingy with it.

After all, with his current talent, once he activates his soul vision, making money and becoming rich will be a matter of seconds.

But pursuing your interests and exploring the limits of knowledge and technology is a lifelong pursuit.

"Yes, they're all brand new."

After inspecting all the equipment, Lin Dong instructed Cai Wei: "This afternoon, test all the equipment and provide a detailed performance parameter table. I will update the avionics control system and flight control system tonight."

The rest of the fuselage and engines are ready. Tomorrow afternoon, we will begin final assembly and test flights..."

"no problem."

Cai Wei became excited and looked at the various modules in the laboratory with deep anticipation in his eyes.