On the upper wing of the aircraft, the British also installed a 7.7mm machine gun. Of course, in general, they do not expect this machine gun to produce any output. This thing is used as a range-finding machine gun for tanks. When aiming, they will first correct it, and then concentrate firepower to shoot.&1t;/p>

After this modification, the British engineers needed to calculate the weight problem. It turned out that the weight of this aircraft was g, and in fact, the fuel load was only about 4 ookg. Including the machine guns, description equipment and cockpits, plus the additional machine guns and ammunition, the UK did some calculations. The combat take-off weight of this aircraft became 23 oo kg! There is no way, the weight of 5 large-caliber machine guns and components alone was as high as 27 kg, and there were thousands of bullets! Although some things were removed, the weight increase was certain.&1t;/p>

"Boss, is it still changing according to the plan? This may be heavy. I'm afraid the center of gravity of the plane has changed, right?" said the technician, looking at the plane that was already flying.&1t;/p>

"Of course it has changed! Don't forget that the three-person plane has become two-person planes. We have lost the weight of one pilot, which is about 80 kilograms." The person who is known as the boss said very easily. "We have only done less than half of our work!"&1t;/p>

If the previous improvements have turned this DH11 light bomber from a bomb porter into a shark with sharp teeth, then the next job is to put a thick layer of hard skin on the shark. After all, you are hunting a giant dragon in the air. The dragon is not only thick in skin, but also has strong attack power, especially when they are grouped together.&1t;/p>

So, next, these guys who were fitters before enlisting in the army will put thick armor on the plane under the leadership of Allen, the only engineer in this group. The first thing they do is to press a bulletproof armor on the motive!&1t;/p>

"This is a challenging job for me." Looking at the Feilong 9-cylinder air-cooling motivation in front of me, engineer Allen began to consider how to install armor while comparing the drawings. Different types of motivations have different types of installation methods, such as liquid cooler. Although the liquid cooler is very fragile, the coolant flows and dissipates heat in all cylinders. It is not only complex in structure, but also very easy to damage. As long as a shrapnel breaks the cylinder of the motor, then soon all the coolant will flow. If the aircraft has no heat dissipation, they can only wait to die.&1t;/p>

However, liquid cooling motors also have advantages. The data of the prior-effect ratio will be very good. Secondly, the front windward area is very small, so the resistance will be very small. Third, the cooling efficiency is high. As long as the motivation is not designed too badly, cooling is generally not a problem. And the third point is that defense is easier to arrange.&1t;/p>

Let me put it this way, if the weight is not limited, the British can wrap most of a liquid-cooled motor in armor, leaving only the oil radiator on the lower part of the motive! (Dear book friends, do you feel that this idea is familiar? Yes, this is how the Il 2 in history was designed. The entire motive cabin, except for the oil radiator, is protected by armor. Moreover, because of the liquid-cooling, there is no need to worry about the overheating of the motive. After all, the heat dissipation place is just the oil radiator!)&1t;/p>

But now, the British need to install armor on this wind-cooling motor! As the name suggests, the air-cooling motor relies on the airflow blowing through the motor to dissipate heat. Therefore, the idea of ​​adding a lid directly in front of the motor can be thrown directly into the garbage dump. If the air inlet is blocked, you will be able to dissipate heat!&1t;/p>

In the past, air-cooled motors were generally not equipped with defensive armor on the front of the motivation because even if a certain cylinder was destroyed, the motivation could still operate in a short time, and the loss of heat dissipation oil was slow. If the luck was not particularly bad, it would always make a landing. But now it is different. Facing the firepower of the bomber group like a storm, it is too common for a motive to be hit by more than a dozen shots in an instant, so the motivation must be added to armor.&1t;/p>

Therefore, after leaving the vent on the front of the motor, Allen installed a ring armor on the periphery of the motor to block the incoming bullets from some angles. However, the effect was not good during actual measurement, because the installed ring armor reduced the ventilation volume, and the cold air incoming was not enough, and the heat dissipation problem could not be solved. Then, the British chose to install a cooling fan on the propeller coaxial to improve heat dissipation, and two rows of vents were opened on the side of the motor to help cool. After some modification, the cooling system of this aircraft was finally used with armor.&1t;/p>

After the frontal defense problem has been solved to a certain extent, the following is the defense on the upper and sides of the motor. Obviously, after the British added ring-shaped bulletproof armor and added a cooling fan, the weight of the motor has been significantly improved. Moreover, because the force of the motor needs to drive the cooling fan, the power used on the propeller will actually be reduced. If this is a 4oo horsepower, that is, above-level motivation, it will be better, but unfortunately, the maximum power of this motor is only 32o horsepower, so if you want to consider flight performance, you can only stop at it.&1t;/p>

After the motivation is improved, it is the protection of the personnel cockpit. The easiest thing is to get an armored bathtub, but in fact it is impossible and the weight is not allowed! So, a bulletproof steel plate was added to the front and back of the cockpit that is most easily shot. Some parts of the side of the body also had 3 to 5mm thick steel plates. That's all. In short, for interceptors of this era, it was already very good to do this.&1t;/p>

In fact, from the perspective of armor defense, what the Germans did was very similar to what the British did. They all made limited defenses for the motivation and cabin. After the strengthening of firepower and defense, this aircraft already had the basic performance as an interceptor. But to say that it would be an excellent interceptor? Then wash and sleep, because the distance is really far away!&1t;/p>

The modification of the first aircraft took about three days. After the pilot was asked to test the flight, the latter said that the flight quality was really bad... The aircraft weight increased a lot, the degree decreased a lot, and there were some problems with maneuver and operation response. According to the pilot's words: "I feel like I am operating a flying weight..."&1t;/p>
Chapter completed!