"Note that we will be in the skies over land and we will carry out the first course proofreading at Danzig." Yekinny shouted over the radio, informing his formation.

Now they have 13 DB-3 bombers left, and their long voyage has finally gone a third of it.

It is much more dangerous on land than at sea, because the land is always exposed to the enemy's night fighters and ground anti-aircraft fire, but they have no choice, they have to fly this straight route to meet the needs of the round-trip.

And now, they are about to enter the land, and as the flight continues to prolong, the error of the voyage will become larger and larger, and they have to rely on the coordinates of the ground to make corrections.

It's normal to lose your course during a night flight, and now they have to check the course.

In front of the bomber, the navigator Slotov sat in his place, his eyes, looking down through the sighting device, hoping to see the light of the city of Danzig, so that he could aim at his own route.

Now, the Germans are quite arrogant, they never thought that they would also be attacked, so the Germans are not in the habit of controlling the lights at night, they can definitely find it, if they can't find it, it must be a deviation in the route.

Slotov was concentrated, there was nothing in the black hole below, which made him feel an ominous feeling in his heart, could it be a lost flight?

So, where is your side? Could it be that after being illuminated by the flare, your course changed? After flying for more than an hour, even if it is an error of one degree, it will cause a deviation of more than ten kilometers. Enough to miss a city.

Slotov was about to take out the route map to find out where he was, when he was about to take his eyes off the optics when suddenly, a light came from below.

In the dark, people's pupils will be dilated, allowing more light to enter people's eyes, so that they can see clearly, and sudden bright light, the eyes have no time to adjust, and the consequences are quite terrible.

For example, now, Slotov suddenly felt a bright light sting his eyes, and all the light in front of him was white, and he couldn't see anything clearly, but his heart was extremely clear.

Searchlight, this strong light, strong light from the ground, must be a searchlight, damn it, I was actually discovered by the German coastal defense forces! "Searchlight!" Slotov only had time to shout out such a sentence, and in his rear, Yekinny had already noticed that the situation was not good.

"Attention, spread out at once, get rid of the searchlights!" At this time, pillars of light shone from the ground to the sky, and their planes were actually shrouded in this pillar of light!

He knew in his heart that it was not good, and now, his own bomber forces were afraid that they would be more than lucky, and as long as they could disperse, some of the bombers would still run away.

And at the same time as he just gave the order, the anti-aircraft artillery units below had already begun to fire fiercely.

"Tom, tom." Just now, the radar had already pointed them in the right direction, they had calibrated all kinds of shooting elements in advance, and now, when the searchlight accurately captured the target, there was only one thing left for them, and that was to fire!

The 40-mm Bofors anti-aircraft guns fired the most fiercely, and in just a dozen seconds, more than 20 shells flew into the sky.

The smoke of gunpowder shrouded the position, and under the light of the searchlights, the tracer shells were so eye-catching, and the entire sky was torn to pieces.

It is not easy for anti-aircraft guns to hit the target, because it is attacking in three-dimensional space, and the previous shells were all killed by direct collision, and only when they can hit the target can they be powerful, even if they pass by, they will not bring any threat.

At the same time, in order to avoid the threat of shells falling down, warheads are designed to self-detonate, such as ordinary small-caliber shells, which almost always self-detonate at an altitude of 3,000 meters after they do not touch the target.

The small black flowers bloomed one by one, making the bomber unit look thrilling, passing through these small black flowers, but in fact there was no particularly big threat, for example, in most air defense operations in World War II, on average, it took almost thousands of shells to successfully intercept an aircraft.

The danger will only increase when the city is bombarded with a large amount of anti-aircraft fire.

But now this shell is different.

The warhead of the shell was made of copper, and now this shell plays another role, it is an antenna.

Inside the warhead, there is a small transistor radio wave transmitter, when it flies out of the muzzle, under the action of inertia, the circuit is turned on, using the warhead antenna, it begins to emit 180 to 220 MHz of radio.

Yes, this is the radio proximity fuse, Germany has overcome all the technical difficulties, successfully mass-produced, it is at least ten times more expensive to manufacture than an ordinary warhead, but its hit rate can be increased by two orders of magnitude!

In later generations, this fuse was first invented by the Americans and was seen as an absolutely secret weapon, which could only be used in complete safety and avoid being obtained by the other side.

But Germany doesn't matter.

Germany's radio technology is a generation lag ahead of other countries, and now Germany's main force is transistors, while other countries still can't figure out the principle of transistors, let alone mass production.

Therefore, if other countries want to imitate, it is impossible.

It is precisely because the transistor effectively reduces the size that it is possible to equip small-caliber anti-aircraft guns with such shells, and in history, the Americans only had 127 mm shells to cram into such things.

Tracer light can still be fired outside, so that the anti-aircraft artillery unit can see clearly, this graceful arc, flying towards the target.

At this time, the target aircraft is maneuvering to evade, and if it follows the course, it will pass by the target, but now its mode of action has changed.

The warhead is rapidly approaching the target, so that the radio signals emitted by the warhead begin to be reflected back by the target.

As the distance between the shell and the target decreases, the Doppler effect causes the reflected radio waves to create a low-frequency signal of 200-800 Hz within the current of the transmitter. The signal was filtered and amplified, and finally, the detonation requirements were met!

At this time, the warhead is still ten meters away from the target, and the reflected low-frequency signal has already triggered its electric detonator.

"Boom!" The 40-mm shell exploded violently, and in the explosion, countless shrapnel expanded into the surrounding airspace, and the 40-mm shell exploded, enough to cover a space with a radius of fifteen meters.

The DB-3 bomber inevitably entered this space full of shell fragments, and the fragments collided with the fuselage, making a terrible noise.

A shrapnel flew over the spinning propeller and smashed into the engine, cutting through a tiny oil pipe.

The dark red aviation gasoline splashed out, and when it splashed on the cylinder radiators, it instantly brought a terrible fire.

"The left is on fire." Yekinny's pilot shouted.

Their plane, hit! Yekinny shouted loudly: "Quick, turn off the engine!" ”

The two were scrambling to maneuver, and the bomber was already tumbling and falling downward.