Set sail1992

Chapter 378 To maintain technical advantages

"You guys are very thoughtful, and you're targeting a blank market," Professor Xu nodded approvingly, looking at Zhang Jialin and Zhang Qihang with emotion: "For the common people in these areas, there was no such agricultural machinery before. If the price of your tiller is right, it will be difficult not to make money."

Zhang Qihang quickly said: "This needs more help from the school."

"It's easy to say, cooperation is good for everyone." Professor Xu waved his hand, turned his head and said to Zhang Jialin: "However, Comrade Zhang Jialin, before the official start of this cooperation, I still suggest that you go abroad to investigate the development of micro-cultivators. , it would be best if we can learn from the advanced experience of foreign countries;

Also, things from abroad may not be able to work in China. After the inspection abroad, I suggest you go to the south and visit and investigate, and communicate with farmers in person to understand their needs and the price they can afford. No problem, let's formally cooperate again. "

Of course Zhang Jialin knew that Professor Xu's words were from the bottom of his heart, so he quickly said, "Thank you, Professor Xu, your reminder was too timely. I'll go out and investigate later."

Professor Xu nodded with a smile.

After chatting for a while, Professor Xu couldn't help it: "Come on, I'll take you to see your helicopter, and your two versions of the HT300 engine are also there. Speaking of your aviation version engine, Guess how much we've got the weight down now?"

Could it be that the weight of the engine has dropped significantly?Zhang Qihang was overjoyed and quickly asked, "Teacher, how much is it?"

"24 kilograms!" Professor Xu's face was full of pride: "And it includes the full weight of engine oil, carburetor and forced air cooler!"

"24 kg?" Zhang Qihang was stunned: "How did it drop so much?"

According to Zhang Qihang's calculations, the weight of the aeronautical version of the HT300 engine is about 29.5 kg to 30 kg. The reason for such an error is due to the error between design, processing, and craftsmanship, and the design itself It is just a rough design, and Harbin Institute of Technology needs to continue to help itself to improve. In this process, considering that Harbin Institute of Technology may use better technology and materials, it is possible to further reduce the weight of the engine, but in any case , Zhang Qihang did not expect that the weight of the engine would be reduced by 24 kilograms, which is a full weight reduction of 5 kilograms!

Seeing the appearance of his lover, Professor Xu became more and more proud: "For the engine casing and cylinder block materials, we used aviation-grade 7-series aluminum alloy materials that are only used in more advanced piston-type aero engines. Ribs are designed on the surface of the shell, so that we reduced the thickness of the engine shell to 2.8 mm under the premise of ensuring the strength.

In addition, we use a large number of high-strength forged alloys for components such as pistons, crankshafts, and connecting rods. With higher-strength forged materials, we can find ways to reduce the weight of these components...

In short, you can also see the result. After adopting a lot of methods to reduce weight, the dead weight of the engine is only 24 kg, but the advantage is that this part of the weight reduced by the engine can be distributed to the load. 30 kg of pesticides.

Of course, in order to reduce the weight of these few kilograms, the overall manufacturing cost of the engine has also increased a lot. According to calculations, the manufacturing cost of a single engine is now about 3000 yuan, so now I just want to ask you what you mean. program, or a new program? "

Zhang Qihang frowned.

From the perspective of the plan alone, the new plan is definitely good. Under the premise that the maximum take-off weight of the aircraft remains unchanged, the maximum load has been increased from less than 25 kg to 30 kg. How awesome is this plan?
But from the perspective of market development, this is not a good solution. The maximum load of the Yamaha R-50 is only 10 kg, and its entire load of 24.5 kg is already very impressive. If the load is directly increased to 30 kg... in the future What can I do if I upgrade again?
Thinking of this, Zhang Qihang felt that there was nothing to hesitate about this matter.

"Adopt the old plan for the time being."

"what?"

Professor Xu was stunned for a moment, but he didn't expect Zhang Qihang to insist on using the old plan even though he already had a more advanced plan.

Not only Professor Xu was stunned, but Zhang Jialin, who followed the whole conversation, was also stunned. He couldn't help asking: "Since the new solution is better, why not use the new solution? Is it because the cost of the engine has risen too much?" ?”

"It's not because of this, but because of the consideration of commercial promotion," Zhang Qihang felt that there was nothing to hide in front of his father and teacher. Facing the puzzled teacher and Zhang Jialin, Zhang Qihang said directly: "For example, the current Yamaha The R-50 has a maximum load of 10 kg, so the load of our Huateng plant protection drone is 15 kg, which is 50% higher than that of Yamaha, and the price is also cheaper; wait for Yamaha to launch a 15 kg load product. At that time, we launched a 20 kg load...

By analogy, in this way, it can be guaranteed that even with the technology we have now, we can maintain the advantage over Yamaha in the next 10 years. After all, the speed of upgrading of plant protection drones is not so fast. . "

That's it!

Of course Professor Xu was not stupid, he immediately understood that Zhang Qihang's actions were beyond reproach, he was completely from a commercial point of view, but even so, he couldn't help but sigh in his heart: "It's a pity."

"Teacher, it's not a pity at all," Zhang Qihang said with a smile, "Although we don't use this plan for the time being, our company will pay for it as a technical reserve for the future, so that teachers and brothers will not waste their efforts. "

With Zhang Qihang's words, Professor Xu was immediately happy, and nodded with a smile: "That's good."

Since the efforts of the students have not been in vain, the money and bonuses that should be given are quite a lot. What is there to be dissatisfied with Professor Xu?
…………

When I came to the laboratory with Professor Xu, I saw Zhang Qihang, and they were my seniors...in fact, they were all Zhang Qihang's seniors... I greeted Zhang Qihang one after another, and Zhang Qihang responded happily one by one. After chatting for a while, I talked to Let's all watch the drone together.

Compared with the helicopter model that Xia Muqing gave Zhang Qihang, the remote control unmanned helicopter without the outer shell is much bigger in size, with a length of over two meters. Although it does not have the outer shell, it looks impressive People think it is extraordinarily mighty and majestic, but seeing the layout of the medicine box, Zhang Qihang frowned...

(End of this chapter)