PS: This chapter of East China Zhixiong is sick again.,I was going to introduce it a little bit.,It turned out that a chapter came out.,Alas.,Old army fans are not good at this.。 Pen @ fun @ pavilion wWw. ｂｉｑUｇE。 infoIf you find it boring, please ignore this chapter.

Air cooling and liquid cooling, is the difference in the form of cooling of the engine, as the name suggests, air cooling uses air cooling, while liquid cooling uses coolant, which is now generally water.

The original engines, all air-cooled, had some advantages.

For example, the weight is light, compared with the liquid-cooled one, there is less water jacket, less heat dissipation water tank, as long as the heat sink is arranged outside the cylinder barrel, it is much less weight than the liquid-cooled one.

At the same time, because the liquid cooling system is omitted, the whole engine is less troublesome, and the overall reliability is improved.

At the same time, in an air battle, if the opponent kills the cooling water tank with one shot, the liquid-cooled engine is scrapped, and the cylinders of the air-cooled engine are dispersed in a circumferential plane, so the possibility of being hit by the pot is reduced.

However, the mainstream now is liquid cooling, which is because air cooling has some congenital defects.

The first biggest flaw is the cross-sectional area.

The airplane is to fly, the larger the windward area, the greater the air resistance, the liquid-cooled engine, the cross-sectional area is very small, and the air-cooled, need to arrange a plurality of cylinders into a plane, the cross-sectional area is large, and finally lead to the increase of the air resistance of the whole aircraft.

At the same time, the arrangement of air-cooled airbornes will cause more obvious and violent vibrations than liquid-cooled airbornes, which will undoubtedly affect the aircraft.

Moreover, because the air-cooled engine is cooled by using heat sinks or directly exposing parts to the air, and the heat sinks cannot be increased indefinitely, in this way, in terms of heat dissipation, air cooling is worse.

In the history of aircraft research and development, air-cooled engines often have a headache for heat dissipation, and if they don't do well, the engine will catch fire, while liquid-cooled ones don't have this concern.

In fact, there is no conclusive conclusion whether liquid cooling is better or air cooling, and in World War II, many ace fighters were born, including air cooling and liquid cooling.

For example, the Nakajima "Rong" 21 star-type air-cooled piston engine and the Cat's R1830 star-type air-cooled piston engine are the pinnacle of air-cooling.

The Spitfire I's "Merlin" 12V liquid-cooled piston engine, the BF109's DB601 liquid-cooled piston engine, the 40's Allison V1710-33 liquid-cooled piston engine, and the IL-2's Mikulin AM-35 liquid-cooled piston engine are all excellent liquid-cooled engines.

Regardless of whether it is air-cooled or liquid-cooled, as long as you can win, it is a good aircraft!

And from the actual situation in Germany now, although DB601 is already very good, the production is limited, and now Goering has put on a posture, obviously even if he quarrels, he will definitely not give it.

Simply, start anew!

At the same time, from Ciric's point of view, the Navy, using air-cooled engines, is more appropriate. For example, if you look at the United States on the other side of the ocean, you can see that the US Army Air Force uses liquid-cooled engines, while the Navy is all air-cooled.

Why? Troublesome maintenance, poor resistance to blows!

Liquid-cooled engine has coolant, if the weather is cold, when starting the engine, you need to fill boiling water in advance to preheat the engine, and once the water leaks, it is even more of a headache, so in cold areas, it is difficult to serve liquid-cooled engines.

When Germany invaded the Soviet Union, the sortie efficiency of the BF109 was less than a quarter of that of the FW190, which is the reason.

And air cooling is not so troublesome, and it can be ignited directly at any time! And on the aircraft carrier, far from the mainland, there is not much fresh water on the warship, and if you have to prepare for the aircraft, it will be even more of a nightmare.

Moreover, the air-cooled strike resistance is strong, and in battle, once a cylinder is hit, it is still possible to fly back, and if it is liquid-cooled, you will have to parachute.

On land, skydiving and the ground followed, and at sea, jumping into the sea was about the same as suicide.

Although the air-cooled windward area is large, it can be mitigated by the superb design, and Ciric trusts Focker-Wulf in this.

Because, this is what happened in history, and the FW190 that came out in the end is even more advanced than the performance of BF109!

Historically, Germany looked at the world and found that it was quite dangerous to have only one BF109 to dominate the world.

Because other air powers have at least two modern fighter jets that are about to enter service, in 37 years of history, Germany has proposed technical specifications for new fighters.

In the spring of 38, these technical specifications were sent to the major manufacturers, hoping that between them, advanced fighters would be born.

According to the plan, Fokker designed a compact fighter with a star-shaped air-cooled engine.

However, at that time, the German top brass were all supporters of in-line water-cooled engines, and they did not approve of Fokker's new fighter plan, so this plan did not enter Goering's eyes at all.

But then, the development of the Heinkel He100 and He112, on which Goering had high hopes, failed, and at the same time, despite the full power of Junkers in Dessau and Daimler-Benz in Stuttgart, it was not possible to provide a sufficient number of liquid-cooled engines for aircraft production in the short term.

This led to the fact that Heinkel had to significantly scale back and eventually stop the production of the He111P bomber with the DB601 engine in favor of a concentrated production of the He111H powered by the Junkers' Jumo 211 engine.

As a result, just like the BF109, the FW190 finally re-entered the eyes of the Luftwaffe.

And Fokker is also quite competitive, this aircraft was finally developed, and it is even better than the BF109!

As for the problem of large frontal area, it was also cleverly solved by the designers, who designed the engine cooling air intake in the engine hood and covered it with a special ducted propeller hub fairing, which not only increased the cooling air flow, but also reduced the air resistance.

And now, because of Ciric's crossing, history has changed again, and this fighter, which almost died in history, will enter active service earlier!

"I suggest that the navy raise its own funds, select a manufacturer, and use BMW's air-cooled engine to develop a carrier-based aircraft suitable for the navy." "My personal suggestion is to ask Fokker to design, and the most basic indicator is to surpass the BF109 in an all-round way," Shironk said.

Goering's mouth opened wide, and although he didn't say it, his eyes betrayed him, and that look, he was clearly saying, Ciric, are you bragging?