In the Japanese Navy's original plan for a sneak attack on a US port, the factor of anti-torpedo nets was originally taken into account, and Li Huamei only wanted to throw 700 kilograms of bombs to severely damage US warships, and to use guò to fly and drop bombs at a low altitude to scrape the sea. According to this assumption, because the bomb height is too low and the impact force is insufficient, the damage to the battleship can often only be superficial, and it can be heavy but difficult to sink. However, now after receiving the good news that the US warship did not have anti-torpedo nets, the entire Japanese Combined Fleet is overjoyed.

When the clock in San Francisco passed 12 o'clock, about 220 kilometers off the coast of San Francisco, the three aircraft carriers Musashi, Soryu, and Wyvern were driving against the wind, and the three aircraft carriers were now lined up with bat attack planes, and according to the situation in San Francisco Harbor, half of the attack planes were equipped with aviation torpedoes, and the rest were carrying 700 kilograms of aerial bombs.

Normally, the bombs of various countries use standard weights, such as 250 kg, 500 kg, and 1,000 kg for the German system, while the Americans use pounds, and the Navy uses 500 pounds and 1,000 pounds (454 kg). The 700-kilogram bomb was actually a "non-standard" bomb specially developed by the Lin Han family's traverser in order to squeeze out the last drop of potential of carrier-based attack aircraft.

In addition to their special weight, the appearance of these bombs prepared for the sneak attack on Jiujin Port was also a "water drifting bomb" specially designed for low-altitude sea-skimming bombing. By inertia, it can jump on the water surface and advance dozens of meters, which greatly improves the hit rate of horizontal bombs.

This water-drifting bomb is also a technology imported from Germany. At that time, Germany developed this kind of water drifting bomb in order to improve the hit rate of attacking enemy merchant ships when breaking diplomatic relations in the Atlantic. However, the sea conditions in the Atlantic Ocean are bad, the wind is high and the waves are strong, and the interference is severe, and after many tests, the combat effect of the water drifting bomb in the Atlantic Ocean is very poor. But in the relatively calm harbor, the water drifting bomb shows its hideous claws.

If it's daytime. When this old biplane carrying 700 kg of bombs to attack a warship at a speed of 150 kilometers per hour, because of its straight course, slow speed and low altitude, it was simply the best target for attacking in the face of the hedgehog-like anti-aircraft guns on the enemy warship, but a sneak attack in the middle of the night was another matter.

It was 0:00 a.m. on April 25. When San Francisco began to control the lights and the lights of the whole city went out, the three aircraft carriers Musashi, Soryu, and Wyvern were lit up at the same time. With the ship's spirit in place, they can ensure that there are no enemy ships or planes within a radius of 100 kilometers around the fleet, which is why they are so bold to release the planes.

On the three aircraft carriers, one bat after another slid on the flight deck, leaving the runway and flying into the night sky.

In the era of piston engines, there was a term in the aviation world. It's called "high-altitude supercharging, low-altitude fuel". This means that the performance of the aircraft's engine depends on the performance of the supercharger at high altitudes, and at low altitudes, the performance of the engine depends on the fuel label used.

The 120 Bat attack planes used in the sneak attack on the Port of San Francisco were all imported from Britain with "purple gasoline", which was expensive. Its quality is equivalent to 120 aviation gasoline. (Note: Historically, when Spitfire V fighters used this gasoline, the maximum speed could be increased by forty kilometers) High-quality aviation gasoline brought powerful power to the heart of the Bat attack aircraft. The effect of a 1,100-horsepower engine flying 1,100 horsepower -- of course, the consequence of using good jet fuel is that after this battle, the engines of the bat-attack planes that come into attack almost have to be overhauled or even replaced.

The Bat attack planes that took off first flew at a low altitude of about 1,500 meters and advanced to a distance of about 100 kilometers from the target. The attack aircraft flew at a low altitude of less than 40 metres above the sea in order to evade the search of the coast guard radar. In order to prevent being left behind, each attack aircraft installed two red warning lights at the wing roots.

Flying at night, a qiē is all about the pilot's technique and instrument count, and is located in the rear. Yamato Nadeshiko, who was integrated with the Yamato, scanned the flight status of the attack aircraft group every five minutes at the cost of consuming the power of faith, so that it could keep track of the movement of the attack aircraft group to avoid yaw. In order to get closer to the target, the battleship Yamato had at this time approached to a distance of only one hundred and eighty kilometers from the port of San Francisco.

Because the surface of these Bat attack planes is made of canvas and wooden planks with weak radar reflection signal ability, the signals on the radar are very weak, and the flight altitude is low, and when they fly less than 30 kilometers from the port of San Francisco, the local radar has not detected the signal of the attack planes.

Another mistake they made for the U.S. air defense forces in the Port of San Francisco was to rely too much on radar's early warning capabilities.

In some countries with poor radar technology, they use air defense early warning means as a kind of loudspeaker-like listening device, which can hear the hum of the spiral of an aircraft dozens of kilometers away. During World War II, Italy, Japan, and the Soviet Union, which did not have a high level of radar, used this seemingly "backward" air defense early warning means in large numbers in air defense.

But here is where the Americans are unlucky, and the Americans, who have deep pockets and are not bad at radar skills, simply do not look down on such backward early warning devices as the listening device. They relied too much on radar, and it was not until the batton swarm flew to a distance of less than 15 kilometers from the port of San Francisco that the duty officer of the local radar station was horrified to find a large number of high-speed moving signals suddenly appearing on the radar screen.

At this time, the bat attack group was only two or three minutes away from the port of San Francisco.

A terrible air raid siren sounded in the harbor of San Francisco, and the soldiers who had been awakened from their sleep hurriedly ran to their air defense posts, and before they could turn on their searchlights to arrest the enemy, the first group of 24 bat-attack planes had already flown over the harbor of Old Mountain.

The four leading planes that had rushed forward took the lead, and they climbed high into the air and dropped the flares they carried, illuminating the figures of various warships that were neatly parked in the old golden harbor.

The first group of bats to attack, under the guidance of the on-board transistor radio of Yamato Nadeshiko in the rear, had already cut into the harbor from the best angle.

The first attack was made by ten attack planes carrying aviation torpedoes, which they scraped at an altitude of only thirty meters from the sea, and at the same time they were aimed at the same target: the battleship Massachusetts, which was parked at the outermost part of the fleet group, and they dropped their belly torpedoes less than 1,200 meters away.

A total of six torpedoes hit the left side of the battleship Massachusetts, and the guide quickly tilted to the left, and thanks to the timely order of the captain of the ship to fill the right side with water and leveling, the ship finally avoided the fate of capsizing, but because of too much water, it sank to the anchorage. At the time of the attack, half of the ship's sailors were fooling around on the shore and did not return, so 550 people died in the end.

Another South Dakota-class battleship, the Alabama, was not so lucky. A full twelve Bats carrying aviation torpedoes laid siege to the steel giant, hitting eight torpedoes on one side and successfully detonating the ship's rear ammunition depot.

Less than a minute and a half after the attack began, with an earth-shattering bang, the Alabama sank into the harbor in two with a large burst of fire. Of the more than 900 sailors on board, only 40 were rescued in the end, making it the most deadly warship of the night.

The two Essex-class aircraft carriers were also key targets for Japanese aircraft.

The Essex also ate five torpedoes on one side and was hit by six "water drifting bombs" at the same time, although the ship's captain Robert also ordered the release of water in time, but the six water drifting bombs that hit the hull and the torpedo wounds ignited the ship's aviation gasoline depot, and the ship quickly ignited a skyrocketing fire, and the fire quickly burned to the ammunition depot. In order to save the ship, the captain ordered to open the sea valve and fill the water without a single breath, and a large amount of seawater had poured into the ship before the ammunition depot was detonated by the fire.

Although Rear Admiral Robert saved the ship from being blown in two like the South Dakota, the Admiral's sailors did not have time to escape from the battleship because it sank too quickly, and in the end more than 700 people on the ship were killed.

Another Essex-class aircraft carrier, the Yorktown, was in a good position, with "friendly ships" on the left and right sides to help block the guns, and finally was hit by a torpedo at the stern of the ship, which magically hit the rudder of the ship. But there were twenty bomb-laden bats eyeing the aircraft carrier, which was located at the blind spot of a lightning strike. Aiming at the twenty rounds of bombs he dropped, four directly hit the upper part of the hull and three underwater.

The four 700-kilogram bombs that hit the hull of the ship blew four shocking holes in the surface of the aviation hull and caused a fire.

But it was one of the three underwater bullets that hit the ship hard.

When one of the underwater bullets fell in the air, it hit the hull of the ship directly, but due to the angle of the collision, it did not explode on the spot, but after sliding into the water, the fuse began to work nine meters underwater. Because this is the non-armored part of the ship, coupled with the help of water pressure, a huge mouth of 30 meters long was torn here after the explosion, causing countless water ingress, plus the damage caused by two other underwater bullets, in the end, the aircraft carrier that seemed to be lighter than the Essex was injured, but because there was too much water on one side, the hull did not have time to fill the water and level, and directly overturned and sank into the water at the anchorage. More than 600 people on board were killed.

The rest of the lost bombs either fell into the water or were eaten by a light cruiser and a large tugboat that blocked their guns. The hapless Atlanta-class light cruiser ate four torpedoes and two bombs, and only lasted a minute before sinking to the bottom with a clatter. (To be continued......)

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