In mid-August, the Eighth Route Army Aircraft Factory received good news that the 11-ton Hippo helicopter was about to make its first flight.

You must know the Hippo helicopter, but it is the largest and most advanced helicopter in the world today, the eleven-ton helicopter, which can be said to be larger than many bombers, and its fuselage size is even about the same size as the C47 transport aircraft.

This is definitely a big plane in the world today, so this first flight is also very important, because the Allies have ordered a lot of Hippo helicopters, and of course, the Eighth Route Army will also equip a few of them.

This Hippopotamus helicopter is about the same size as the Miba Hippo helicopter twenty years later, but in terms of appearance, it is more like a Black Hawk helicopter, with a wide-body design, so that the cabin is very wide.

The Hippo helicopter can not only be used for military purposes, but also can be used as a passenger plane or a special aircraft, and in the future, it can also be used as a private jet, but that will definitely be after the war.

The load capacity of the hippopotamus helicopter is very strong, the cabin can be loaded with two to three tons, and the hanging capacity can reach more than four tons, which is very powerful.

There are quite a few leaders who came to attend the first flight ceremony today, and there are also representatives of the Allied Forces, who are the biggest customers, so today's first flight can only be successful, not failed, otherwise the Allied Forces do not have to order.

Of course, for the Allies, they must want to get this kind of large helicopter technology, but now the Eighth Route Army is definitely not willing to sell it.

Duan Peng and Li Yunlong were chatting happily with the leaders, and now the preparations were ready, and the test pilots were ready to start working.

They walked around the hippopotamus helicopter and checked its body to make sure there were no problems before they could start the test flight.

Of course, these work ground crews have been done very carefully, but according to the process, the pilot still needs to be re-checked.

So it was a no-brainer, and after the two test pilots and a pilot had completed their inspection, they entered the cockpit of the Hippo helicopter.

The hatch closes, and the next exciting moment is coming.

At this time, the comrades of the aircraft factory were quite nervous, because no one dared to guarantee that there would be no problems with the first flight, even Duan Peng was a little nervous now.

Finally, the test pilots started the engines, which are two high-power turboshaft engines, each with an output of 1,100 kilowatts, what is the concept? The C47 transport aircraft with a take-off weight of 14 tons, its two engines, each of which has less than 900 kilowatts of power, is still a piston engine.

These two engines are the most advanced turboshaft engines, with high power and small weight, which are very advanced.

So when these two engines were successfully started, the propellers also rotated.

The rotors of the Hippo helicopter are also quite large, with a diameter of 17 meters, and under this strong lift, the huge fuselage of the Hippo helicopter slowly left the ground and rose towards a higher sky.

Everyone applauded, this was a test flight that went down in history, the world's largest and most advanced helicopter, it successfully took off.

Relying on a few thin blades, you can hold up a body weighing several tons, which is indeed a very good technology, which is why even if the allies get the hippo helicopter, it is difficult to imitate it, not only the engine is difficult to imitate, but the rotor system is also very difficult to imitate, because Duan Peng is designed with a composite rotor, not an ordinary metal material.

The roar is deafening, this hippopotamus helicopter really looks like a hippopotamus, a grumpy hippopotamus, it is indeed spectacular.

Now the test pilots are trying to get the Hippo helicopter to fly forward, which can be done by tilting the rotors at a small angle.

I saw that the nose of the Hippopotamus helicopter was lowered, the tail was raised, and it began to fly forward quickly, and the scene broke out into a burst of warm applause, it seems that the Hippo helicopter flies very easily, because the power is too abundant, so it flies very fast, and the visual speed has exceeded 200 kilometers per hour.

Of course, its maximum speed can exceed 300 kilometers per hour, and it is not only the largest helicopter, but also the fastest helicopter, which can reach the speed of many fixed-wing aircraft in the early days of World War II.

The Hippo helicopter circled a few times at an altitude of several hundred meters, and it seemed that the test pilots were flying more and more confidently and skillfully.

They began to try to hover, this is a difficult maneuver, only to see the hippo helicopter, slowly stopped at an altitude of several hundred meters, the whole fuselage was hoisted by the rotors, the fuselage began to turn direction, but the rotors were stable.

This made the representatives of the Allied forces excited, such advanced helicopters, of course, the more the better, they were impatient, wanting to experience the feeling of flying or riding a hippo helicopter.

Of course, it can't be done yet, after all, it has just been a test flight, and it is not very safe, and you will not be able to experience a hippo helicopter ride until the test flight is completed.

After completing the hovering test flight, the Hippopotamus helicopter began to jump at a large angle again, and it seemed that the test pilots were very confident, which was also for the Allied representatives to see.

The last action is to fly upside down.

I saw that the nose of the hippopotamus helicopter was raised, the tail was sinking, and it began to fly backwards, this kind of inverted flight is not the head-down inverted flight of fixed-wing aircraft, but like reversing in the process of driving, backwards, except for helicopters, there is no plane that can fly backwards like this.

So the applause on the scene continued to sound, it was so beautiful, the leaders of the Eighth Route Army were also excited, and now the Eighth Route Army Aircraft Factory has become the birthplace of the world's most advanced aviation technology, and Duan Peng's contribution to the Eighth Route Army is too great.

Not only that, Duan Peng is also making a contribution to mankind, in the future, with these advanced aircraft, after the war is over, then everyone can enjoy convenient air travel.

The Hippopotamus helicopter, which completed its first flight, is now starting to descend in altitude and is ready to land.

Its attitude is very stable, and it seems that the test pilots have fully mastered the flying skills of the Hippo helicopter.

The Hippo helicopter landed smoothly on the parking stand, the test pilots turned off the engine, and the rotors slowly stopped.

As soon as the test pilots got off the plane, they were thrown into the air by the enthusiastic crowd of people who liked to celebrate the success of their first flight.

The Allied representative excitedly said to the leaders of the Eighth Route Army: "Great, this is the large lift we want, with it we will achieve victory faster!" ”