I started with a ship full of max-level veterans, and I'm just a complete noob.

Late at night, Jiang Ming returned to the 502 confidential cubicle, laid out three sets of punched paper tape on the drafting table, and placed half a bowl of fried noodles next to the drafting board, the noodles already stuck together.

Old Sun carried a thermos into the room, first filling the enamel mug with water, then sharpening the pencils scattered on the corner of the table and arranging them according to length next to the tin box.

"The alumina furnace tubes in Furnace No. 3 will need to be replaced after two more cycles, and the diffusion furnace is also entering high-temperature calibration. Don't wait until cracks appear before thinking about spare parts."

Jiang Ming took out the furnace tube maintenance form from the document bag and added the joint number after the replacement cycle.

"Have Fang Xudong check the inventory tomorrow morning. After the old pipes are retired, keep the thermal history records and don't mix them with ordinary waste materials."

Old Sun responded, placed the noodles with soybean paste next to the thermos, and told him to eat a few bites while it was still edible. He then took his toolbox to check the backup generator.

The three sets of paper tapes on the drafting table correspond to the regular southwest monsoon, upper-level jet shear, and northwest gyratory winds of Jiuquan, respectively. The data has been converted from mainframe time into a unified input format.

Jiang Ming imported the sideslip angle deviations under three wind fields into a newly built simulation table. The first round used the Su Fang smoothing matrix, and the second round retained the critical fluctuations in the original summary.

He opened the "Record of Human Connections" and retrieved the correlations between crossflow separation, yaw moment, and integral amplification from the basic aerodynamic fragments already collected, no longer seeking new complete answers.

Those fragments only provide physical relationships; the specific values ​​still need to be determined by actual measurements in Jiuquan, the Soviet summary, and the overall group interface. If any input is incorrect, the trajectory will deviate significantly at the end.

Jiang Ming first drew the first trajectory line. Under the normal southwest monsoon, the landing point given by the Soviet model was shrinking to the right of the test site, and the offset was still within the safe zone.

The second change involves upper-level jet shear, which increases the uncertainty of the actual wind field. However, the variance calculated by the Soviet model continues to decrease, and the end of the trajectory is closer to the nominal point on the right.

The third line uses a northwest turning wind, with the sideslip angle crossing two separation critical zones. As a result, it still contracts in the same direction, and the ends of the three lines are lined up in a row on the paper.

Jiang Ming put down his pen and rechecked the symbols, integral step size, and shutdown delay interface. Every part was consistent with the overall group's standard format.

The Su Fang matrix not only smoothed out the aerodynamic inflection points, but also retained a directional bias after smoothing, so that the dispersion converges to the right side of the test field regardless of the type of monsoon.

Such results appear stable and attractive on the summary table, and designers, if they only look at the final distribution range, might even regard it as evidence that the control system has sufficient margin.

Two knocks came from outside the iron gate, and Ren Xinmin came in carrying a set of calculation papers. His collar was damp from the night, and his enamel mug was empty.

"After the overall interface has been reorganized, I'll check your integration constants first."

He sat down on the other side of the drafting table and started recalculating from the first trajectory, first checking the low Mach inlet velocity, and then checking the sideslip angle symbol and the direction of the control surface response.

After finishing the first iteration, he drew a small circle next to the integration constant, thinking that there might be differences in the selection of reference points, and then recalculated using the original coordinates of the whole group.

The second time the track still contracted to the right, so he disassembled the power-on delay and lateral stabilization modules to try to find the symbol error in the final interface.

After the third set of wind field calculations was completed, Ren Xinmin's hand, which had been turning over papers, stopped on the drawing board, and sweat from his forehead trickled down his temples and into his collar.

"The wind shear increases, the input variance increases, but the output dispersion decreases continuously, which is contrary to common sense in aerodynamics."

Jiang Ming pushed over the three versions of the Soviet parameter revision records.

"The critical fluctuations of the first version are still there, the second version suppresses them, and the third version, along with the residual reversal, is smoothed out, and the contraction direction is fixed from the second version onwards."

Ren Xinmin compared the revision dates page by page, marking each change with a red pencil. All three revisions were concentrated in the range of sideslip angles most easily triggered by the Jiuquan monsoon.

He slammed the recalculation sheet on the table, his fatigue pushed aside by a surge of suppressed anger.

"This goes beyond tabulation differences; they know which interval to fire the bullets from."

The telephone at the end of the corridor rang for half a ring, then fell silent, and the indicator light on the wall also went out.

Jiang Ming picked up the telephone receiver, but there was only static in the line, and the power meter of the internal telegraph machine simultaneously dropped to zero.

With only three hours left before the guidance demonstration meeting, the three sets of trajectory lines have not yet been printed as official appendices, and the overall team is still waiting for the final review results.

Ren Xinmin walked to the door to check the corridor wiring and found that the auxiliary power supply shared by the telephone and internal telegraph was cut off, but the main lighting was still working normally.

"Someone only modified the communication branch."

Jiang Ming opened the electrical distribution box in the corner of the wall and checked the lead seal and fuse. The fuse holder of the communication branch was pulled out, and the copper plate still had fresh friction marks.

He took out a spare dry cell battery from the military toolbox, isolated the low-voltage input of the internal telegraph machine from the original power supply, and then connected it to the transmission circuit through a voltage regulator resistor.

The military-grade dry cell batteries that Liu had prepared for the direction-finding equipment had a limited capacity, but were enough to issue an emergency summary.

The telegraph machine indicator light came on again, and Jiang Ming asked Ren Xinmin to read out the three sets of deviation ratios, while he coded them one by one according to the overall group format.

Three tracks, two models, and a fixed contraction direction were compressed into the shortest message, first sent to Qian Xuesen's office, and then copied to the overall group's duty room.

When Fang Xudong arrived at the secure compartment, he had the power distribution room duty roster in his hand, and the inspection signature for the communication branch had stopped ten minutes earlier.

Jiang Ming compared the temperature of the safety seat, the distance between the two corridors, and the duration of the power outage to circle the area where the operation could be completed.

"The person cutting the line is familiar with the location of the branch line and must enter the power distribution room within the last ten minutes to check the duty officer, the person borrowing tools, and the temporary access records. The door must be sealed first, and then the security department will collect fingerprints and shoe prints."

Fang Xudong wrote the requirements into the on-site sealing form, and then took Comrade Song to guard the power distribution room. Soon, the sound of personnel verification echoed in the corridor.

The printing equipment still relied on the original power supply line, and there was no time to bind the formal materials, so Jiang Ming arranged each set of hand-calculated drafts into layers: input, model, integration, and result.

He wrapped the three sets of original derivations in waterproof paper, then put them into a sealed bag, and sealed the bag with a double-numbered seal of 502 and the Fifth Academy General Group.

This set of drafts starts with Jiuquan radiosonde data, goes through sideslip angle, crossflow separation, control response and terminal integration, and each step can be independently reproduced by another engineer.

Ren Xinmin leaned against the metal cabinet, took out cigarettes and handed them to Jiang Ming. The two of them lit one each, and the smoke spread along the vent.

"If we adopt it directly, what will happen with the first shot?"

After asking the question, Ren Xinmin looked down at the three tracks; the answer was already written on the paper.

"In a normal wind field, the controller may only show frequent corrections. When encountering high-altitude shear, the controller will treat the actual jump as noise and suppress it, and then accumulate rudder force in the wrong direction."

Jiang Ming flicked away the cigarette ash and turned the second track toward him.

"After the yaw crosses the safety zone, the ground will only see the control system working continuously. On the surface, every component is executing commands, but the underlying parameters are steer the entire system to the right."

Ren Xinmin stubbed out his cigarette in the tin ashtray, rechecked the seal on the sealed bag, and confirmed that the core computing chips could now be directly sent to the meeting.

The sound of several cars braking repeatedly could be heard outside the building, their engines running at low speeds in front of the main entrance of the classified building.

Comrade Song hurried back from the end of the corridor and opened the curtains a narrow gap.

"The Soviet advisors' convoy has arrived. Vasily is with three technical assistants, and the dossier has been sealed with a new red clay seal."

Jiang Ming fastened the file bag, and the car doors outside the window opened one after another. Vasily had already stepped onto the steps of the classified building.