When Qu Sen and the other two arrived, the school leaders instructed them not to be afraid of spending money. It is best to print out a few more sets of spare parts.

After listening to the quotation, the three base materials were bought in the whole package, so it would be a waste. We decided to print ten sets of three types of blades and some easily depleted components. The three cases were worried that they would need to be adjusted in the future, so they printed three of them.

After technician Shao calculated the consumption, he quoted a price of 48,000 yuan. This price is already very cheap, saving nearly half of the money compared to the budget the three of them had originally prepared. It is even more incomparable to finding a mold factory to open a mold.

After the price was fine, technician Shao helped convert the electronic images brought by the three people into 3D templates and imported the printer's control computer. Worried about wasting materials, he asked the three people to check the detailed parameters of the 3D model again.

The three of them were also worried that they would spend the money and found that there was something wrong in the design drawings. They put them in front of the computer and carefully confirmed the drawings bit by bit.

Not to mention, this confirmation really revealed the problem. After understanding the hardness and toughness of the consumables after forming in detail, Li Ying suggested that the thickness of some cases can be further reduced and only assist in thickening the connection part.

In this way, the weight of the three drones can be reduced a little. With a lighter weight, the flexibility and battery life can be improved a little.

Qu Sen and Zhou Li agree very much with this idea.

If it were a few days ago, they might not have cared about the little bit of improvement in parameters, but now they know that there are competitors in the selection to be participated in, and there will be many competitors with strong technical strength.

The three of them thought that students from other schools could also think of what they could think of. So everyone put together entries with similar functions to compare whose performance parameters were better.

Although adjusting the weight of the case is not very conspicuous to improve the flexibility and endurance of the drone, if you don’t solve this small parameter difference properly, it can play a decisive role.

According to the toughness parameters of the material, it is not complicated to calculate the thickness of the case, but there are many places that need to be changed. After the three of them calculated it, they started to operate it for a while. Technician Shao couldn't bear it and took over the change with a smile.

The professional technicians who work on electronic drawings are completely incomparable to Qu Sen. In just over an hour, technician Shao completed the change work according to the three of them. This job is to let Li Ying, who is the most familiar of the three of them, and it probably takes half a day.

Because high-density special materials were used, the printing speed was much slower than similar. After the printer started working, technician Shao told the three that they would not be able to print them all until around 3 pm.

Qu Sen thought about it and felt it was not good to stay in the equipment room and watch it. After discussing it with Zhou Li and Li Ying, he decided to go back to the guesthouse first and come to pick it up after all the things were printed.

Because I saw that the seemingly dilapidated unit in front of me was "there was a world inside". The three of them did not dare to go around when they left the design building, so they went back to the guesthouse and stayed honestly.

After lunch, Doudizhu, who had been playing in the room for more than two hours, the phone rang in the room. Technician Shao informed that the last set of paddles had begun to be printed.

The three of them quickly put on their coats and trotted out of the guesthouse. After arriving at the design building, they had another rigorous check and inspection before they reached the third floor again.

In the 3D printing room, watching the things he had drawn on the drawings by himself turned into light gray objects similar to plastic, the three of them were excited. They confirmed with technician Shao that they could touch them with their hands, and quickly took the parts in their hands and looked them carefully.

The edges and details of the things printed by the 3D printer are very smooth, unlike molding things, and some small places need to be processed manually.

Technician Yuan had already written the payment slip. After the three of them had seen enough, they were embarrassed to tell them that they would have to pay the money first to take away the things.

Zhou Li immediately took out the card that had the school allocated funds, handed it to Qu Sen, and then studied the paddles in her hand.

What could Qu Sen say? After asking the location of the finance department, he went to pay the money. After swiping the card, he put away the receipt and handed the receipt to technician Shao, and finally got the printed items.

The supper was eaten in the small cafeteria, and Zhou Li’s father treated her to the train station. After the meal, she sent the car to take the three of them to the train station.

Because the time to start the selection was already very tight, Zhou Li booked the latest train at 10:56 pm.

After another ten hours of bumpy ride, the three of them finally returned to school. Without any rest, they plunged into the operating room. The electrical appliance factory had already sent three motors that needed to be used. Now there are paddles, and a lot of actual testing work is waiting for the three of them to complete.

As the May One Institute sent the gyroscope and supporting drivers through secrets, the three drones finally entered the assembly stage.

At this time, Qu Sen needs to show off his skills, because he needs to hand-weld all three motherboards.

Integrating a bunch of purchased or customized electronic components into a master is a very delicate operation that requires patience.

The welding of the motherboards of Yuyan and Qin Nuo was quite smooth, but because the motherboard of Nightingale was a very light motherboard, and the circuit structure was particularly tight, Qu Sen wiped out two boards and lost some electronic components.

Because time was too tight, Zhou Li and Li Ying were interested in asking Senior Brother Zhao to take over, but Qu Sen's twisting force was wrong and he disagreed. After a good meal at the canteen on the third floor, he went back to the dormitory to sleep heavily. After getting up, he returned to the operating room again. He worked for nearly eight hours in a row, and finally completed the welding and passed the test.

By the time the three drone control software was completed, it was already the end of March, and it was only about ten days before the selection officially began on April 7th.

After the three showed the work results to the school leaders, they began to hurry up and perform functional tests and fine-tune parameters. After repeated debugging, the swift passed the test first, but the balance of the nightingale was problematic. Qin Nu's high-speed camera also had great problems with the images captured in the case of poor lighting.

Although Nightingale can solve the balance problem by adjusting the power of the individual motor or giving the local body weight, it will inevitably sacrifice flexibility and affect battery life.

The motherboard has been redesigned and the time has been too late, so I can only find a way from the shell. I slightly raised the body to make room and fine-tune the position of the battery compartment to correct the balance.

Qu Sen took the adjusted Nightingale shell design drawing and boarded the train overnight and went straight to Zhou Li's father's unit to print the new components. Zhou Li and Li Ying got on the plane and rushed to May 11 to work with the engineers on the other side to further optimize the image processing related functions of Qin Crossbow.

Qu Sen's side was faster, mainly because he had been delayed more time on the road. After returning to school, he completed the reassembly of Nightingale and started testing. After changing into the new "clothes", although it was a little seven millimeters higher than the original design, its stability, quietness and battery life perfectly achieved the previous expectations.

Two days later, Zhou Li and Li Ying also came back with Qin Nu. With the help of the engineers of the May 11 Institute, the shutter time and sensitivity of the Qin Nu high-speed camera were optimized again, and the pictures taken under dark light conditions were greatly improved.

At the same time, Zhou Li's fifth room also studied a small plug-in that can automatically mark suspicious targets. Although the recognition is not high, it is also a dazzling auxiliary function.

On April 4th, Qu Sen, Zhou Li and Li Ying, each of whom was responsible for a drone, performed a demonstration to a group of school leaders and a bunch of professors of various majors in the school. The next day, the three of them boarded the train to Beijing with a burst of encouragement.

After nearly eleven hours, the three of them left Beijing West Station with a suitcase containing a drone. They got on the train to pick up the station and headed straight to a equipment test site of the Equipment Department in the remote suburbs.
Chapter completed!