Back to the Republic of China to be a editor

On January 1, the Chinese government was the first to recognize the Democratic Republic of Vietnam and officially established diplomatic relations. However, at this time, the French army occupied all the major cities and ports in Vietnam, and the Vietnamese army could only fight in the mountains and rural areas. Guerrilla.

On February 2th, Tang Hua finished all the work in hand, and finally had one day to hang around the streets of Shanghai with Zhou Xuan.

On February 2, the chief accountant, who had been busy in the financial and economic consolidation office until the afternoon, received a call from Tang Hua from his home.

"Vice Premier Chen, tomorrow is New Year's Eve, shall I give you a small gift for the Spring Festival?"

"Gifts? Why do I need gifts?"

"In Kunshan in November, you asked for it by name. Now the first one is ready, come and take it away."

The chief accountant put down the phone, sprinted downstairs, jumped into the car with the secretary, and drove to Sinan Mansion.

The lobby on the first floor of Tang Hua's garden house has become a temporary studio. The ground of the lobby and even the lawn outside the building are full of various parts and pipelines.

"This is a transistor computer?" The chief accountant has already read the materials of ENIAC and MESM, but the computer in front of him is only the size of a wardrobe. The shell is made of metal, and the edges and corners are transitioned with rounded edges. I don’t know what material the board is made of. There are 12 round holes in the middle of the wardrobe, and retractable wheels are designed on the four legs of the wardrobe.

"This is the first prototype of the T50 computer." Tang Hua said, "This is the computing unit of the T50 computer. There are 50 computing units installed in the T12."

The chief accountant noticed a dozen "cannonballs" piled up in one corner of the hall.Like a loader, Tang Hua lifted a cylindrical "cannonball" with a diameter of about 10 centimeters and a length of 80 centimeters.

"Each computing unit contains 330 transistors and works at a frequency of 12000 Hz. The 12 computing units are exactly the same, and the most common workers can be used in the factory workshop for assembly and welding production. The computing unit plus the built-in computer The display, memory reading and other modules, this computer contains a total of 9000 transistors."

Tang Hua aimed the cannonball at the round hole and pushed it in with a "wow". When the bottom of the cannonball was flush with the surface of the wardrobe, there was a light click, and Tang Hua knocked down the fixing latch to fix the cannonball. .

"Come and assemble together, we are completing the last process of manufacturing China's first computer."

The chief accountant also picked up a cannonball and carefully loaded it into the wardrobe. After the 12 computing units were installed, Tang Hua stroked the cables for a final check, and then pressed the switch on the wardrobe.

There was a soft "buzz" in the living room, and the black board on the front of the wardrobe showed a large "T50" letter, and a line of small Chinese characters "Ministry of Heavy Industry, Bureau of Electronics Industry" in the lower left corner-this was engraved with a light-emitting tube backlight It is displayed on the board with Chinese characters.

After more than ten seconds, "T50" disappears, indicating that the computer has passed the self-test and is ready to work.

"T50 has two modes, scientific calculation mode and national statistics mode." Tang Hua said.

Chapter 23, The Volley Killer

Taihu Lake.

At the beginning of March, Taihu Lake was quite freezing. Tang Hua, Liu Nai, and Chang Qiankun, the deputy commander of the Air Force, were on a hilltop in Xishan Island. In front of each of them was an adjusted artillery mirror. They all put their hands in their coat pockets and stretched their heads Look at the eyepiece of the artillery team mirror and observe the lake not far to the west of Xishan Island.

The guided bomb project is in parallel with the computer project. The basic work of radio transmission, receiver, control surface, etc., is handed over to Shanghai Jiaotong University. Tang Hua only makes final decisions on key areas. At the end of January, the Soviet Air Force sent the first batch of 1kg aerial bomb live ammunition and training bombs. The development team immediately modified them. The training bombs were modified first, because the training of bomber bombers had to start immediately.

There was a faint bang overhead, which should be the air force's B-25 bomber flying over Taihu Lake.

During the War of Liberation, there were continuous uprisings by pilots of the Kuomintang Air Force. By the time of the founding of the People's Republic of China, our army had obtained a total of 5 B-25 medium bombers, and 4 of them were usable.When the Tu-2 assisted by the Soviet Union was still training crew pilots in the Northeast, Tang Hua and Liu Nai had to use the B-25 as a training aircraft for bomber bombers first.The ground crew of the Air Force changed the bomb pylons of three of the B-25s to be compatible with Soviet-style bombs (it was still a revised version of the guided bomb with a large tail fin and control rudder surface), and began to fly in Taihu Lake. to train.

Tang Hua looked over from the artillery mirror. About 2 kilometers away from Xishan Island, there were two concentric rings floating on the lake. The outer circle was 100 meters in diameter and the inner circle was 20 meters in diameter.The ring is made of white and yellow tarpaulin, and many small iron anchors are used to hold it in place in the lake.500 meters away from the concentric circle, there are two motor sailing boats on standby there, and this is the team salvaging the training bombs.

"Is the salvage team 500 meters away from the bull's-eye a little less?" Tang Hua asked Liu Nai, "What if the bomber is particularly inaccurate..."

"The closer the distance, the faster the target can be picked up. If it sinks to the bottom after a long time, we will suffer a lot of losses." Liu Nai said.

Because the guidance kits are not produced much, the number of guided bomb live ammunition and training ammunition is relatively limited, and the training ammunition must be used many times. If it is damaged or sinks to the bottom, it will be very troublesome.

Tang Hua looked up at the position of the bomber and felt that the bomber should have dropped the bomb by now.

Sure enough, more than ten seconds later, there was a sharp whistling sound in the sky. This was the howling sound from the bomb falling faster and faster, piercing the air.

Not long after Tang Hua heard the whistling sound, a splash of water appeared in the bull's-eye of the lake, and in the middle of the splash was a relatively tall water column.When the bomb touches the water surface, the vibration deceleration also causes the orange-red air bag at the rear of the training bomb to explode, allowing the training bomb to float on the water.

"Hey! Xiaoquan, it's okay to hit directly!" Chang Qiankun sighed.

"Wait a minute, there are two more."

……

On the B-25 bomber, the bombardier Feng Zhang also saw the bomb hit the center of the target through the optical sight with a stabilizer.The bomber made a sharp turn in the sky and re-entered the straight section.

The radio command correction guided bomb is actually a remote control toy. After the bomb is dropped, there will be a small flashing light on the tail of the bomb. The aiming hand turns the cross mirror so that the center of the cross is always aligned with the bull's eye, and the bombardier observes the cross mirror. Use the handle to correct the offset, and after the bomb receives the radio signal, turn the steering surface to return to the correct falling trajectory.Therefore, the guided bomb bomber at this time is a technical job. It takes multiple trainings to develop proficiency, and the talent of the bomber is also very important. After all, it is not like the modern people who played arcade/PS2 since childhood. , Most of the current pilots of our army, including bombers, are farmers with mud legs.

Bombs are dropped and taillights come on.Feng Zhang tried his best to observe the bull's-eye from the scope, and pressed the handle lightly and hard.But at this time, the plane encountered a gust of airflow, and it slid to the left side, and the aiming hand twisted the cross mirror at once.Because the center of the cross was not aimed at the bullseye, Feng Zhang could only control the last 1/4 of the route by feeling, and finally the bomb landed where it almost fell out of the outer circle.

"Nearly missed a round."

"I almost got out of the near-missing circle." Tang Hua said, "The distance from the bull's-eye is nearly 50 meters, and the distance from the enemy ship's hull is about 40 meters. If the 1500-kg aerial bomb is okay, the 500-kg aerial bomb may not be there. can't do effective damage."

……

The B-25 made another big circle and entered the straight line where it could drop bombs for the third time.

Feng Zhang and the aimer glanced at each other.

"Brother, you can't loose your belt this time!"

Feng Zhang rubbed his hands, took a deep breath, and entered the state.

Bombs are dropped.

Feng Zhang looked out from the scope, and the small flashing light of the bomb was located at the lower left of the cross window.Feng Zhang pressed the handle, and the trajectory of the bomb began to change, and it became a deviation to the upper right again.Feng Zhang pressed the handle again with a lighter force...

"Bang—crash!"

A ball of water sprayed out in the small circle of the bull's-eye, and it was another direct hit.

"Ahahaha, it's only the third day of training when we dropped bombs at a level of more than 3000 meters. This bombardier scored two direct hits with three rounds. Yes, yes, who is this pilot? I want to praise him!" Chang Qiankun clapped his hands and said.

Liu Nai was expressionless, grabbed the walkie-talkie and shouted: "The salvage team is quick! Hurry up! The third bomb hit the same point as the first bomb, breaking the floating airbag! If you don't hurry to fish, you won't be able to find it!"

……

Shanghai.

The assembly of the second and third T50 computers is coming to an end.

"These two computers were sent to Beijing, one to the Financial and Economic Commission, and one to Tsinghua University," Tang Hua said to the chief accountant, "Because Tsinghua strongly requested, so I discussed with Liu Nai. The General Administration of Industry and Commerce handed over to Tsinghua University. But the computer ordered by the General Administration of Ordnance Industry in Dalian will be delivered first.”

ENIAC was first invented, and the very important reason was to calculate the ballistics of new types of artillery. New weapons appeared one after another in the United States in the middle and late stages of the war. If the artillery ballistics were still calculated by old-fashioned computers + field measurements, it might not be possible to finish the shooting table for several months. By then the war will be over.Now, Dalian Jianxin Company has begun to design a new type of howitzer after imitating the mass production of the American-made 75mm light howitzer, and will soon compile a shooting table for the new type of artillery.

"Actually, when Tsinghua University asked for a computer, I wanted to give up the one from the Financial and Economic Committee to Tsinghua University," said the chief accountant.

"No, the T50 for the Financial and Economic Committee has actually undergone some customized designs, and is more suitable for simple calculations and data statistics. What Tsinghua University needs most should be scientific computing." Tang Hua said, "And, after a while In two months, in May, the Soviet delegation will come to China for investigation, and they will also inspect your committee, and let the Soviet comrades see this computer, which will be beneficial for future work.”

"In the future, you mean, we export computers to the Soviet Union?"

Tang Hua nodded. "And I think that the institutions with the greatest export potential are the Soviet government, the Civil Affairs Commission, and the Economic Planning Commission, rather than scientific research institutions."

The chief accountant remembered how the computer in Shanghai is used now.After Tang Hua switched the computer to the national statistics mode, he took out 6 small paper boxes, opened it to be a telephone-sized thing with 10 digits and symbols for addition, subtraction and multiplication, and plugged the two-wire cable into the T50 computer You can do simple arithmetic operations by pressing the numbers and symbols on the socket.In this way, in an office with a T50 computer, six people can use the "computer calculator" at the same time.Of course, in addition to providing simple four arithmetic functions for 6 people, the computer can also perform large calculations for programming and store the entered data into tapes.On scientific computing computers, instead of magnetic tape storage, magnetic core memory is used, which has a much smaller capacity and is much more expensive than magnetic tape.