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

Chapter 127 The data overlap is too high, he became suspicious?

Jiang Ming didn't sleep much that night.

It wasn't because of excitement.

He lay on the cot in the duty room, staring at the crack in the ceiling, Fang Xudong's words "eight chambers" echoing in his ears.

I mentally reviewed every line of the magnetron cross-section diagrams in those kraft paper notebooks.

The anode resonant cavity has a depth of eight to nine millimeters, a slit width of two to two and a half millimeters, and a cathode region radius of three to three and a half millimeters.

These figures represent the range of experiences he compiled from textbooks and publicly available information from later generations before his time travel.

When writing it down in my notes, I had no physical objects to compare it with; it was all based on theoretical calculations and literature reviews.

What will Fang Xudong think if the actual measurement data comes out tomorrow and the consistency is too high?

How could a mechanical engineering student make such accurate predictions about the structural parameters of a microwave resonant cavity?

Jiang Ming turned over and pulled the blanket up to his chin.

There is no turning back in this matter.

Reverse engineering of magnetrons was a task assigned by the ministry, and he could not refuse to participate, nor could he pretend to be stupid during the measurement.

The only thing you can do is control the pace so that all judgments appear to come from actual test data, rather than from some dubious notes.

At seven o'clock the next morning, Jiang Ming and Fang Xudong entered the confidential compartment on time.

"My suggestion is to first perform non-destructive external measurements, record all the dimensions, and then consider partial disassembly."

Fang Xudong opened the canvas tool bag and laid it on the table.

Inside were vernier calipers, outside micrometers, and a small protractor, all of which were very clean.

"agree."

Jiang Ming turned to Old Sun at the door and said, "A few sharpened pencils, a stack of graph paper, and find a flat stone slab or plywood to use as a drawing board."

Three minutes later, Lao Sun brought the things in and adjusted the angle of the two lamps.

When the light shines on the surface of the bronze cylinder, the lathe marks are clearly visible.

Fang Xudong is very steady when he gets going.

He first measured the outer diameter with calipers, then closed and opened the box, and read the measurement twice.

"119.6".

Jiang Ming wrote down on the graph paper: outer diameter 119.6 millimeters.

"Axial length".

Fang Xudong changed direction and got stuck.

"91.3"

"Waveguide aperture inner diameter".

I inserted the micrometer and rotated it twice.

"29.1"

When Jiang Ming finished writing the number, his fingers didn't stop, but the tension in the back of his head was already high.

He knew all too well the relationship between a three-centimeter wavelength, the waveguide cutoff frequency, and the inner diameter.

Twenty-nine millimeters falls precisely within the equivalent size range of a standard rectangular waveguide converted to a circular waveguide.

"It matches the three-centimeter wavelength."

Fang Xudong straightened up and adjusted his glasses.

"Shall we open the lid next?"

The four hexagonal bolts at the top are corroded.

Old Sun heard the call outside the door and came in with an adjustable wrench.

He dripped a few drops of kerosene onto the base of the bolt, waited a minute, and then tightened it.

The first one loosened with a creak, and rust powder fell down in a shower.

After all four were removed, Lao Sun lifted the top cover with both hands, revealing the internal structure.

Eight fan-shaped cavities, like orange segments, are evenly arranged on the inner wall of the anode copper block, surrounding the central cathode area.

Fang Xudong inserted a micrometer into the first cavity, the slender measuring head opening between the copper walls.

Radial depth, 8.15.

the second.

"8:20."

The third.

8:18.

Jiang Ming took notes one by one, his pen moving at a steady pace across the graph paper.

The numbers fell quietly on the paper, but in his mind they rang like bells.

The notes said eight to nine millimeters, and the actual measured values were between 8.15 and 8.25, right on target.

"Seam width".

Fang Xudong switched to a thinner caliper and tilted his head to examine it closely.

"2:05, 2:10, 2:08..."

He paused when he read the sixth note, took out the calipers, and then put them back in to measure it again.

"This is too wide, 2.20."

Jiang Ming looked up at him.

Fang Xudong ran his fingernail along the crevice of the cavity and then rubbed it with his fingertip.

"It's been polished. Look here, the grain direction is different from the other seven; it's horizontal."

"Processing deviation?"

"Most likely. The original milling might have been too narrow, so the workers manually ground it to widen it to within the tolerance range."

Fang Xudong straightened up, took off his glasses, and wiped them.

"The Soviets had a higher rate of manual labor than I thought; this thing didn't come from a fully automated production line."

Jiang Ming didn't respond, but instead drew a small circle next to the label on the graph paper for the cavity and wrote "hand repair marks".

The central cathode area is the fastest to measure; a micrometer inserted and turned half a circle is enough.

"Inner diameter 6.15."

After Fang Xudong finished reporting the numbers, he did some calculations himself.

"With a radius of 3.075, the ratio of the launch surface to the tube diameter is relatively small, so the power density should not be low."

Jiang Ming's pen nib lingered on the paper for a moment.

The notes state that the radius of the cathode region is three to three and a half millimeters.

3.075, and it falls right in the center of the range.

"Copper wall thickness".

Fang Xudong continued measuring.

"3.12, 3.08, 3.15... basically just over three millimeters."

By noon, all thirty-seven key dimensions had been measured.

Jiang Ming completed a scaled cross-sectional drawing on graph paper, with the measurement number and time marked next to each number.

Lunch consisted of steamed buns and cabbage stew with vermicelli delivered from the cafeteria.

The two of them squatted on the steps outside the cubicle to eat.

Fang Xudong, chewing on a steamed bun, suddenly asked, "You studied mechanical engineering in the United States?"

"right."

"But your understanding of high-frequency structures doesn't seem like that of someone purely involved in mechanics."

Fang Xudong placed the enamel bowl on his lap.

"When I was measuring the seam width just now, before I even gave the third number, the proportions on your drawing were already accurate."

Jiang Ming took a bite of the steamed bun and chewed slowly.

"Mr. Qian's lectures covered more than just fluid mechanics."

After he finished speaking, he lowered his head and picked up a piece of food with his chopsticks.

Fang Xudong didn't press further, only humming in response, as if this explanation was sufficient for the time being.

The disassembly of the cathode assembly continued in the afternoon.

Fang Xudong handed the tweezers to Jiang Ming.

"You're more familiar with cathode materials than I am, so you can handle this part."

Jiang Ming took the tweezers and carefully removed the broken oxide coating fragments from the bottom of the cathode area.

The surface is grayish-white, the edges are charred black, and the cross-section of the fragments shows a layered structure.

He leaned closer to examine the texture.

"Barium-calcium-strontium system".

"Sure?"

"The fracture surface layering is different from that of the cerium oxide we produce. The barium calcium strontium oxide has this conchoidal fracture after sintering."

Jiang Ming put the fragments into the aluminum box.

"The launch area is much smaller than that of the Type B tube design, only about one-third."

Fang Xudong nodded and wrote a line in his notebook.

The direction of the magnetic field of a permanent magnet component can be determined using a compass.

Jiang Ming placed the compass above the center of the anode copper block. After the needle tip deflected violently, it stabilized and pointed.

The magnetic field is perpendicular to the cathode axis, and its direction is consistent with the textbook description.

"The magnetic field strength cannot be measured precisely, but based on the compass deflection speed and distance, it is estimated to be around 0.15 Tesla."

After writing down the last piece of data, Fang Xudong closed his laptop, looked at the complete cross-sectional diagram on the desktop, and let out a sigh of relief.

"Thirty-seven parameters, all done in one day."

He stood up and stretched his shoulders.

"The blueprints need to be installed in an envelope. You and I will each keep a copy and sign and affix our fingerprints."

The two signed their names and the date on the sealed envelope, and Wu Hanzhang, as the administrative coordinator, affixed the factory seal.

At 8 p.m., Jiang Ming returned to the testing station in Workshop No. 1.

The five B-tube dark red filaments emitted a steady glow in the dark, and the microammeter pointer remained completely still.

432 hours, everything is normal.

Xiao Zhao handed over the duty log.

"Old Sun performed the calibration at four points, and all five meters were within the zero drift tolerance range. The pulse transformer core temperature is 37 degrees Celsius, which is normal."

Jiang Ming signed his name and sat down next to the toolbox.

There was no one else in the workshop.

He bent down and pulled out the brown paper notebook from the bottom of the toolbox, turning to page fourteen.

The pencil lines gleamed a dark gray light under the lamp.

Anode outer diameter: 110 to 120 mm.

The actual measurement was 119.6.

Resonant cavity depth: eight to nine millimeters.

The measured average is 8.18.

Seam width: 2 to 2.5 millimeters.

The measured average is 2.09.

Cathode radius: 3 to 3.5 mm.

The actual measurement is 3.075.