The brutal bombing of Petersburg made the Soviets realize once again the toughness of the Germans, and such a tragedy cannot happen again.

If the Germans wanted to hit any city, they would directly bomb it with bombers, then the Soviet Union would not have to fight this Great Patriotic War and surrender directly.

They have to fight back!

One of the most needed is a high-altitude fighter, the MiG-3 was blown up at the base last time, which shows that the Germans are also afraid of this fighter, so now in the rear, the MiG-3 is being produced at full capacity by the factory, but in this war period, there are still a lot of material delays.

They need the support of the United States, and the fighter given by the United States, they do not dislike the difficulty of piloting, nor the way the cockpit is opened, they only dislike the lack of a supercharger.

You have to be able to fly high and intercept German fighters!

At the insistence of the Soviet side, the American side finally began to help the Soviet side by installing superchargers on the engines.

In fact, this aircraft engine is more famous in the United States, it originally has a variety of models, some with a supercharger, some without it, but when the flying snake is designed, it is focused on low altitude, it is not a high-altitude fighter at all.

If the Soviets want it, they will install it on them, but if there is any problem with the flight quality at high altitude, then don't blame the American planes for being bad.

Greenland Sea.

It's already in the Arctic Circle, and you can see large chunks of ice floe floating out from the north at any time, and those ice floes are a huge threat to the ships that sail here.

"Attention, ice floes are spotted ahead, slow down." On a cargo ship, Captain Chris shouted to his crew.

The Patrick Henry, the entire hull is still quite new, it can be said that this cargo ship has only been launched for more than a month, and although this is not its maiden voyage, it is only the third voyage.

Now, they are cargo ships that are being built in large numbers by American shipyards, and in the United States, there is a unified name, they are all called Liberty Wheels. And the current Patrick is the first of the Liberty ships.

The United States is surrounded by the sea on both sides, and for the United States, if it wants to communicate with the outside world, it has to rely on the sea, and in the current war period, almost all the shipyards in the United States are working at full strength to build all kinds of warships for the US Navy.

But the United States needs not only warships, they also need a large fleet of transport ships.

In response to this demand, the United States placed orders for its own small shipyards to build cargo ships, the most important of which was to shorten the construction man-hours and produce them in large quantities.

At this time, there was an outstanding figure in the United States, Henry Kaiser, who proposed the use of assembly line construction methods, multi-department simultaneous operation, a free ship requires an average of 500,000 man-hours, and the method of sectional assembly is adopted first.

Shipyards for the construction of freewheels usually include steel plate workshops, steel truss workshops, brass recasting workshops, cable workshops, carpentry workshops, plumbing workshops, parts (pumps, etc.) workshops, rigging workshops and painting workshops.

The main engine and boiler for the ship were transported by rail from the subcontractor's factory. All workshop products are transported to the pre-assembly area for assembly and then transported to the final assembly area by crane or flatbed heavy-duty truck.

The original construction, the current Patrick Henry, took 244 days, and the Oregon shipyard's first freeship, the Oregon Star, took 232 days.

A year later, the Oregon shipyard's "Tier" was launched in 10 days. The Robert Pirry, built at the Richmond shipyard, took only 4 days, 15 hours and 29 seconds to build, creating a miracle of industrial production.

Historically, between 1941 and 1945, a total of 2,751 freeships were built in 18 U.S. dockyards.

This kind of cargo ship has a displacement of 7,000 tons and can carry more than 10,000 tons of cargo, which is the most suitable for the United States now, but unfortunately, its appearance is quite ugly.

The bottom of a general cargo ship is U-shaped, but now it is indeed the bow column that is tilted forward and the bottom of the ship is V-shaped, which can reduce the drag and thus increase the speed of the ship when the ordinary main engine is installed.

After it was built, Time magazine called it the Ugly Duckling.

Roosevelt valued these freighters very much, and he knew that only a strong maritime transportation capacity could enable the United States to win the war, so when the first ship was launched now, the Patrick Henry was launched, and Roosevelt himself presided over the launching ceremony.

"Freedom or death, these ships will bring freedom to Europe, to the whole world". Roosevelt borrowed Henry's words, which became the origin of the name of the Liberty Wheel.

Now, the Liberty is loaded with cargo, including trucks, grain, high-grade fuel, and some disassembled Flying Snake fighters, heading for the Soviet port of Murmansk.

They have no choice.

Although the Germans claimed to have set up a European Joint Maritime Enforcement Committee to conduct maritime inspections here, it was clear that they were going to block the route, but at that time they were already full of cargo.

It would take time to unload the cargo, and it would take months more for them to make a detour to the Pacific Ocean, so they had to risk continuing their planned route.

At the same time, for the sake of safety, they deliberately moved the route north.

Originally, they had intended to take the slightly warmer Norwegian Sea, but now they crossed the Danish Strait to the colder Greenland Sea, from where they intended to go east, around the northern part of Jan Mayen, to the Barents Sea.

If you can't mess with it, you can always hide, right? Walking around the distance, the Germans really don't give people a way to live?

Sailing in the Arctic Circle is fraught with risk, with winds sometimes exceeding force 12 and the ubiquitous ice floes being a huge threat.

Chris was wearing the thickest clothes, his beard was frozen with ice ballast, and almost everyone in the cockpit was the same.

The ship was supposed to be heated, but I don't know how, if they heated the wheelhouse, the front glass would quickly frost and it would not be possible to see anything clearly.

Now, all they had to do was open the windows to keep the cockpit at the same temperature as the outside, so that the glass in front of them was finally clear, and they were all shivering with cold.

If you wear one more hat, they'll all look like Santa Claus.

Holding the binoculars and putting them in front of his eyes, Chris continued to look at the course ahead, as if it was much better ahead and no more glaciers were found.

"Forward three, speed up!" Chris said.

Just then, his ears, which were almost frozen, heard something extra, and he looked up and saw a bright spot in the sky.

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