In the initial stages of aircraft design, calculations were based only on calculations, but the calculation methods of naval science, including the complete experimental approach, also proved from the side that it was not difficult to realize this aircraft.

Before, even if the research on the trial engine of the internal combustion engine was completed, the Dinghai Navy did not dare to try to make an aircraft, because the standard of more than 300 kilometers is too high, and this height is simply not achievable now.

The power is blessed to a certain extent, especially under the premise of high wind resistance and resistance, plus the power, the increase in resistance that cannot be offset, 300 kilometers is almost impossible to achieve.

However, 150 kilometers is not a difficult thing, you know, on the steam-powered locomotive, has achieved a speed of 175 or even 180 kilometers per hour, although the newly completed internal combustion engine, his overall power, is much smaller than the steam engine, but the weight of the aircraft is also much lighter.

The first prototype has already begun to be designed, because considering the relationship between performance, the use of wings, the use of a large number of light wood, and some other things, so that the overall weight is very light, and the overall strength is not very high, but it is enough to support the weight of a person.

In the previous theoretical research, a lot of plans have been made, and even a lot of settings have been made in advance, and all the designers have gathered together to jointly design the first aircraft of the Dinghai Navy, and once the design of this aircraft is completed, it will definitely go down in history.

With the basic data of the engine, it is much easier to design the aircraft, and they are more, so that the entire fuselage part, fits the engine, and shows the maximum capability.

In the case of preparing the prototype, there is good news that on the basis of the original internal combustion engine, some of Zhao Xin's things have been eaten thoroughly, and some of the vague things Zhao Xin said have been brought out, just a stroke and a closed engine inner compartment, plus some transmission devices, so that the performance of the internal combustion engine has been increased by 30%, which can also be used on the internal combustion engine without increasing the weight too much. ，

This was great news, and it was soon used in the new design of the flight engine, because the aircraft designers knew very well that the engine represented the overall performance, and even if the entire setup was not greatly improved, the power increase was enough to take the performance of the aircraft to the next level.

At present, this overall scheme has not yet been applied to aircraft engines, but the two sides have figured it out, but they have added some steps, and a little incorporation will not make the overall volume have a huge increase, but promote the overall performance.

This sudden discovery also made the aircraft designers realize that after the emergence of the internal combustion engine, after completing the basic settings, if it wants to develop, it will be very fast, to a certain extent, as long as Zhao Xin's strange settings are thoroughly understood, the improvement of the entire internal combustion engine is huge.

You know, the power of the previous internal combustion engine has reached 20 horsepower, this number, compared with the steam engine thousands, or even thousands of horsepower, the difference is huge, but for the internal combustion engine, it is already a very large, on the basis of 18, and increased by about 30%, which means that the entire horsepower will cross 25, which is a huge increase for the aircraft.

Knowing that in the future, it can even be foreseen that in a not too long period of time, the power of aircraft engines will be greatly improved, in this case, the designers, of course, will not be conservative, they are quite radical, left and right, the position of the engine installation, slightly leave some margin, such as volume, such as weight, slightly increase, and will not let the overall performance of the aircraft drop much, but once the power breakthrough, for the aircraft, is huge.

After a little advance, and enlarge the part of the engine, the final design of the aircraft, it is formed, not only the weight of the engine itself, but also the overall weight of the fuselage of the aircraft, after a series of reductions, the overall weight has been reduced to about 180 kilograms, which is a total length of 6 meters, wingspan width of up to 8 meters, The height of the entire fuselage is also more than 2.5 meters above the behemoth, and with the use of a lot of lightweight wood and some hollowing settings, the weight of this aircraft is extremely light.

The horsepower of the engine, about 25 horsepower, this is already the ultimate horsepower of the aircraft engine after weight reduction, plus fuel, the master, and some equipment, the maximum take-off weight is about 280 kg, compared with the previous one, at least less than 6 percent, and with it, the take-off speed will be reduced a lot.

Theoretically, the speed of take-off will be reduced to between 180 and 190 kilometers, which is an easy speed to achieve, the performance of the internal combustion engine, compared to their initial expectations, has improved considerably, it can be said that he is naturally suitable for racing and development of a power setting, although it is said that during this time, the aircraft has not been completely finalized and designed, but according to the general figures, a model with a similar weight and a slightly smaller volume has been made. The model, with an internal combustion engine engine, can travel at a high speed, reaching a maximum speed of 250 kilometers per hour on the aircraft's preset runway.

Before, it was just a fantasy, a design aspect, but now, as long as the overall setting of the aircraft is completed, and the power and transmission are optimized, not to mention the speed of 250 kilometers per hour, even if it is 180, 190, it is acceptable.

The designers brainstormed and changed drafts several times, and in the end, they came up with a definitive setting that was more suitable for aerodynamics and the afterburner was also better.

Dingjun already has a propeller, the earliest time, it was used on a ship, at that time it was still a manpower transmission method, the propeller rotated in the water, there are some unique settings of strength and tortuousness, now, the use of the air, can also be used to take it, however, as a separate engine, a separate propeller, this propeller, very large.

Only the huge propeller can provide sufficient function, this radius has a high propeller of one person, making full use of the height of the aircraft, almost the bottom, almost close to the ground, the top, and beyond the height of the aircraft, the diameter of the total propeller, rushed up to 3.5 meters, if the engine is pushed to a very high speed under the premise, it can provide enough power.

In the actual tests on several projects, the performance of this propeller is very good, theoretically, it can convert most of the horsepower of the internal combustion engine into forward pulling power, pulling the aircraft forward and moving quickly.

According to calculations, the power of the propeller should be much higher, coupled with the improvement of the internal combustion engine, in about 140 kilometers, you can take off.

Soon, after a period of intense construction and design, the aircraft was finally completed, and this prototype concentrated all the technologies of all aspects of the Dinghai Navy, which together could play a very outstanding role and support the first flight experiment of the Dinghai Navy.

From the very beginning, the aircraft of the Dinghai Navy has embarked on a completely different path from history, and from the first time of its birth, it is not a handiwork of enthusiasts, but a very sophisticated product that takes into account the form of aerodynamics.

All the parts, some of which are even uniquely set up for the sake of the aircraft, these parts, in the beginning, were not mass-produced at all, and many of them were hand-made by master craftsmen.

Because of this hand-built, the whole aircraft fits very well, whether it is the fixation of the engine, the installation of the propeller, and other aspects, it performs very well.

This is completely different from the first generation of enthusiasts, the strength of the country, as well as the ability of industrialized construction, is undoubtedly shown here, and even when processing, there is a problem with a part, and the Dinghai Navy directly dropped 8 eighth-level workers.

Even in later generations, this represents the top mechanic of processing, can be processed by hand, comparable to the results of high-precision machine tool processing, of course, the senior workers of this era, may not be worse than later generations, and even because of the advantages in training, strength, stronger than later generations.

Later generations have never heard of a strong man like Sun Ji, and the breathing method and the standing pile method of this era, which together will make the trainer stronger and more stable, which is very critical to processing parts.

The almost handmade aircraft, although it has not yet been tested for flight tests, but the performance in all aspects is already very good. The previous calculation formula was quite accurate, but there was no real take-off experiment, and it was speculated from other places, which was not enough to prove everything.

Finally, it is time for the prototype test flight, it can be said that compared with the birth of the aircraft in history, the treatment of this is very high, all re-paved, specially prepared for aviation, a total of 640 meters, even if it is placed in the 21st century, it is a relatively long runway, and it can even take off large intercontinental airliners.

You know, the plane invented by the Wright brothers, when it took off, was only on a section of lawn, and it was only a few tens of meters long.

According to the standard of calculation, the most is aerodynamic, such a lawn, at least not conducive to continuous acceleration, they lose a lot of speed, and it is prone to problems.

The early airplanes were all enthusiasts' games, in order to fly into the sky, or to show strength, in such rudimentary, even adventurous conditions, it is easy to take off and land, it is easy to have problems.

Historically, all aircraft inventors have taken risks, and many famous aircraft inventors have ended up in plane crashes, for example, Feng Ru, a famous Chinese aircraft designer.

Mechanical accidents are one of the most important reasons, in addition, take-off and landing accidents are also an important aspect, this point, maybe the early enthusiasts, did not pay attention, but Zhao Xin still noticed, because there is an indicator in later generations, plane crashes, most of the accidents, are in take-off and landing.

Doing everything safely and replacing the lawn with a flat runway with less friction is good for the test flight of the aircraft.

When a light, but not so smooth-looking airplane stood on the runway, all the researchers began to breathe calmly.

When the propeller located at the head of the aircraft, driven by the engine, begins to rotate rapidly, driving the aircraft to move forward, faster and faster.

Although Zhao Xin knows that aircraft engines are generally only equipped on the wings in later generations, at present, the Dinghai Navy is not very good at the material, and how this kind of engine should be arranged on it involves many arrangements such as shrinkage and aerodynamics.

Although Zhao Xin drew out the graphics, in the end, these people chose this kind of arrangement located in the nose, which has the highest strength and is easy to arrange, and the two wings are arranged with the simplest arrangement, that is, the double-layered, relatively wide wings.

When the engine began to run, the brakes were stepped on, the propeller began to rotate wildly, and after a certain speed, the aircraft brakes were released, and the strong pulling force directly pushed the aircraft forward rapidly, and today it was just windward, after a short, insufficient acceleration of 140 meters, the speed has exceeded 100 kilometers, which has not reached the critical value.

However, the effect of the wind, as well as the air flow brought by the high speed, which the calculator did not take into account, in the actual test flight, but it was shown, the plane obviously had a huge lift, and when the pilot pushed the sense of direction, the plane began to leave the ground and fly in the air.

All the designers, observers, and researchers cheered that the first heavier-than-air airplane flew into the sky, which also represents the arrival of an era, and this point in time was witnessed by them.

Zhao Xin himself also wanted to personally participate in this test flight, and even if he had the opportunity, he could also fly into the sky by himself, but he was persuaded by others, in the Ding Navy, there are countless new projects, and the development of all aspects is also very rapid, to a certain extent, there are many more important projects than the aircraft, and in addition to the possible dangers of the aircraft, in the end, Zhao Xin's itinerary was blocked, but at the first time when the aircraft test flight was completed, the on-site command, or through telegram, informed Zhao Xin of the good news.

Zhao Xin also hurriedly made a series of knowledge to ensure safe take-off and landing, and do a good job of first-hand information, study the flight theory and flight formula of the aircraft, the most important offensive, has been completed, but this can not solve all the problems of the aircraft take-off, must be in-depth and long-term research can, this will take a long time, fortunately, the Dinghai Navy is not short of time now.