Chapter 287 The motivation is ominous, and you will become stronger when you are strong!
12 horsepower, top speed of 30 kilometers per hour, built-in crank handle, high turn-around rate.
This is a myth in the field of tractors and a world-famous single-cylinder engine legend. Yu Hua did not hesitate to choose to pay tribute to the past classic.
In terms of power, the twelve-horsepower single-cylinder diesel power amplifies the torque through the transmission system and can tow cargo containers with a mass of several tons to more than ten tons. If the horsepower reaches more than one hundred horses, it is not a problem to pull hundreds of tons.
In a word, motivation is ominous, and when it is strong, it becomes strong.
When it comes to pulling things, the classic walking tractor can tow all the trucks of 1937 for three blocks. The standard load is 750 kilograms, the actual load starts at 3 tons, and the normal load is 5 tons. It is unusual to occasionally pull 10 tons of sand or fertilizer.
As long as the tires and beams can hold up, then no matter how hard it is, no one can stop the walking tractor from moving forward.
Going up mountains and down ditches, pulling goods and people, traveling across every corner of China.
In terms of reliability, as long as the quality is up to standard, there will be no problem in using it for ten to twenty years.
In terms of design concept, emmm...the design concept and appearance of the walking tractor are at least fifty years ahead of the current era.
The reason why Yu Hua chose the classic walking tractor is very simple. This thing is almost a universal artifact. In his previous life, the economy of rural counties was driven by it. But in this era, it can perfectly bear the transportation needs of industrial raw materials in the base area, hauling goods in peacetime, and during wartime.
Raise firecrackers, pull supplies, and attract people, and the application environment will be filled directly.
The most important thing is that this thing is too simple, and the low technical content is simply outrageous.
There are only two core components, a single-cylinder diesel engine and a transmission system. A front is added to the top, a beam is added to the bottom, and a cargo box is built in the back. They all work together.
After the concept drawing of the tractor was completed, Yu Hua marked the transmission system structure and various performance parameters of the tractor and handed it to Professor Zhuang.
"It has a dead weight of 1 ton, a power-to-weight ratio of 12 horses per ton, a 12-horsepower single-cylinder diesel engine at 1,400 rpm/60 Nm, and the torque reaches 280 Nm at 300 rpm in the first gear, which is amplified to 7,000 Nm through the final drive, and the torque is 120 Nm at 700 rpm in the second gear.
Nm, which is amplified to 3000 Nm through the final drive... The design of this transmission system is very clever, and the total transmission ratio reaches 25 times."
Professor Zhuang took the design sketch and looked at the design appearance. His eyes were quickly attracted by the parameters and structure of the transmission system. His eyes lit up and he saw this new tractor with a strange but simple structure from a professional perspective.
A torque of 7,000 Nm is not unusual. Any large tractor or car can reach this level, but the point is that this is the torque amplified by a 12-horsepower single-cylinder diesel engine through the transmission system.
A transmission system with a total transmission ratio of 25 times.
12 horsepower produces 7000 Nm of torque, which is very interesting. According to the formula, divide this torque by the tire radius, you can get the total driving force of the power machine.
Based on the tire radius parameter marked on the design drawing of 300 mm, that is, 7000 Nm ÷ 0.3 m = 23333N, the total driving force is 2380 kg.
In other words, such a small thing with 12 horses can easily pull two or three tons, and can easily travel with five or six tons.
Calculating the total driving force data of the classic walking tractor in his mind, Professor Zhuang secretly clicked his tongue, feeling rather surprised. You must know that the Japanese Army's 94 military truck next door weighs about four tons, has a nominal load of only 1.5 tons, and has about a horsepower of about 1.5 tons.
It looks like sixty horses.
One has twelve horses pulling five or six tons, and the other has sixty horses pulling one and a half tons. Even a child can understand how big the difference is.
interesting.
Really interesting.
From a technical point of view, Zhuang Qianding had to admit that the tractor developed by Yu Hua had no design flaws. Its appearance and structure were completely different from the Western tractors currently imported into the country, and its load-carrying performance and practicality were extremely high.
It has small horsepower, large torque, and an extremely simple structure. The gears are composed of three forward gears + two reverse gears + neutral gear. The maximum speed of the first gear is 10 kilometers, the maximum speed of the second gear is 20 kilometers, and the maximum speed of the third gear is 30 kilometers.
In terms of top speed, this tractor is definitely not as good as a truck. When it comes to actual off-road speed, Zhuang Qianding feels that the off-road capability of this tractor will easily crush the Japanese Type 94 military truck.
"How did you come up with this transmission system? You have a very thorough understanding of the gear set and the design is extremely exquisite." Professor Zhuang reviewed the entire tractor design and confirmed that there were no obvious flaws in the design. He turned to Yu Hua and said.
"The student had a sudden inspiration earlier. Professor, what do you think of the design of this tractor? It can be used to pull goods for civilian use, transport materials and personnel during wartime, and can also be used as a 105mm howitzer tractor." Yu Hua responded with a smile, seeking advice from Zhuang.
Qian Ding’s attitude.
With the strong torque of the classic tractor, it can easily tow a 105mm howitzer with a total combat weight of 1.8 tons. The rear compartment can also transport artillery shells and artillery. Although it is not as good as the special artillery tractors of the British and American families, it is very useful for the base area.
Say, with this tractor, what kind of special tractor is needed?
The industrial foundation of the base area is weak, the economy and resources are scarce, and there is no ammunition to build any professional special vehicles. Multi-purpose and all-round power machinery such as walking tractors are most suitable for the conditions of the base area.
"No problem, just follow this design. You will be responsible for the tractor, and I will be responsible for the cement. I will do preliminary research in the past few days, and then write a technical report and submit it to the organization."
Professor Zhuang nodded, finalized the tractor design plan given by Yu Hua, and then distributed the work in an orderly manner: "I really didn't expect that in order to build a 105mm howitzer, we not only have to engage in the steel industry and machinery manufacturing industry, but also
Power machinery.”
There is a hint of interest in the words.
Whether it is the steel industry where the oxygen top-blown converter project is extended, or the machinery manufacturing industry for manufacturing air separation equipment and various machines, or the cement industry and power machinery industry, all of these originate from the original target - the 105mm howitzer.
.
In order to build a cannon, establish an industrial system...
To be honest, if this situation were told, others would not believe it at all.
"Yes, when all this is settled, we will be able to see the 105mm howitzer developed by ourselves entering the battlefield and bombarding the Japanese army." Yu Hua nodded, looking towards northern Shaanxi thousands of miles away, and soon came to his mind.
The last 105mm howitzers were deployed in the troops, demonstrating the momentum and power of the god of war on the battlefield.
360° circumferential shooting range, 23x tube, 14km maximum range, 105mm caliber. With these performance data, it’s beautiful just thinking about it.
If hundreds of 105mm howitzers were assembled to form an Eighth Route Army heavy artillery group, the scene would not be too shocking.
Of course, Yu Hua knew very well that he had no chance to see the scene of heavy artillery bombardment. He should be in the United States at that time.
To determine the solutions to the two problems of traffic and transportation, Professor Zhuang was responsible for developing a complete set of cement production processes and developing a classic tractor.
Overall, the technical difficulty of the two projects is average, and both Professor Zhuang and Yu Hua can complete them independently.
The cement production process has been developed for more than decades since its birth. The production process is very mature. Rotary kiln equipment is used to achieve 24-hour uninterrupted production. The industrial raw materials are limestone, clay and coal.
As for the sudden addition of two scientific research projects, Professors Yu Hua and Zhuang said that they don’t need to worry about having too many lice and they don’t have to worry about having too many debts.
After the discussion, Professor Zhuang stayed in the mechanical engineering laboratory to write a cement production process report and started pre-research work on the cement rotary kiln production process. Yu Hua has not worked on the design of the classic tractor for the time being. Today, Saturday, this is the meeting with Mr. Rabe
Schedule trading time.
He had to arrive at Mr. Rabe's residence before half past ten in the evening.
Yu Hua quickly returned to the laboratory, changed his clothes, and left the school through the east gate under the cover of night. Following his usual style, he conducted counter-reconnaissance and confirmed that no one was following him. Then he found a rickshaw nearby and headed straight to the city.
East.
…
The night is dark, cloudy tonight, and there is no moon.
The sea breeze carried a faint fishy smell and the sea surface was ups and downs with ripples. A cargo ship slowly entered the Tianjin Wei Port and docked at the port under the push of a tugboat.
This is the 10,000-ton cargo ship Giant that has been sailing at sea for more than a month. It is loaded with German-made machine tool equipment that symbolizes the world's top mechanical manufacturing level and has arrived at its destination - Tianjin Wei.
In the port area, Military Attaché Boer, who was wearing a suit, held an optical telescope with both hands and watched the Giant through the lenses as it gradually docked.
Soon, the Giant cargo ship completed its entry into the port and docked steadily at the predetermined dock location. A dozen people with German identities quickly built the trestle.
On the Titan cargo ship, three men in suits disembarked and went straight to Attaché Boll.
The posture is steady and the steps are fast.
The three young men quickly came to Boll. Immediately afterwards, the leading man straightened his back, raised his right arm at a forty-five-degree angle, put his fingers together and forward, and gave a military salute.
The others followed closely behind, raising their right hands to show the same courtesy.
Military Attaché Boer looked serious and raised his right hand in return.
"Mr. Attaché, I am the commander of the escort team, Geer. The Titan has arrived at its destination safely. According to General Guderian's order, after the escort team arrives at its destination, the command has been handed over to you."
After meeting and saluting, the leading young man picked up the folder he carried with him and handed the cargo list to Attaché Boer: "This is the cargo list!"
The total strength of the escort team was sixty. Guderian deployed a reinforced platoon as a security force for this cargo, and added many automatic weapons.
"Thank you for your hard work, please arrange the unloading immediately." Attaché Boll took the cargo list and carefully reviewed it to make sure there was nothing missing. He became slightly excited, took a deep breath, suppressed his emotions, and issued the order.
"Yes!" Commander Geer of the escort team nodded, then turned and left, arranging the soldiers and crew members of the escort team to lift and unload the cargo.
As the largest port in the north, Tianjin Wei has relatively complete seaport loading and unloading machinery and infrastructure, including cranes, forklifts, warehouses, etc., and four 10,000-ton berths.
According to the content of the transaction agreement signed with Yu Hua, what they had to do was to deliver the mechanical processing equipment to Tianjin Wei and send it to the port warehouse leased in their own name and wait for the other party to move it.
At this point, their trading work comes to an end.
As the wooden boxes wrapped with mechanical processing equipment were slowly transferred from the freighter one by one, piled up in the dock area, and then sent to the predetermined dock warehouse by forklift, Attaché Boll looked at the decreasing number of wooden boxes on the Giant freighter, his eyes filled with tears.
fiery.
Soon.
The time to obtain Y-type armor steel is getting closer and closer.
While the Titan cargo ship was unloading, news of the arrival of the cargo also spread to Peiping and to Rabe.
…
PS: The combat weight data of the 105mm howitzer was wrongly marked before. It was 1.8 tons, not 2.5 tons. Sorry, I just discovered this error today and it has been corrected.
I'll make a sketch of the tractor + 105 cannon later. The Tsinghua Park is about to end, so let's go to the base area next.