The technique that Donald refers to more suitable for air combat is actually the coordination of machine gun fire. Obviously, in the air battle between high-speed aircraft, the air-to-air rocket is a mess of accuracy is very unreliable, this kind of thing is barely enough to fight huge and slow airships, but it is used to attack much smaller, faster, and more flexible aircraft, it is like throwing stones to fight dragonflies, basically, it is useless at all.

Therefore, the machine gun is the most suitable weapon in air combat, but the machine gun at that time could only be mounted in the back seat, firing to the side and back, which was quite inconvenient to use, but some people thought that the machine gun should be fixed in the nose and facing the front. This setup is not only convenient, but also saves the next occupant. And make the plane a lot lighter, and the lighter the plane, the faster it will naturally fly, and the more agile it will be.

It's just that this idea has a very difficult problem to solve, that is, there is a set of flying propellers in front of the nose of the plane, and if you fire directly at the front, the result must be that your own machine gun bullets will beat your own propellers to pieces, and then your own plane will fall from the sky.

Based on the information MacDonald received, the French had already begun to study how to solve the problem. Of course, the French's method was quite simple and crude, and their method was to armor the propeller so that the bullets could not hit him. However, this kind of pit design soon brought another problem, that is, the bullets hitting the propeller were bounced everywhere by the armored projectiles, or even bounced back directly, and then, either the pilot hung up, or the engine hung up.

A few days ago, the MacDonald Infantry Weapons Company provided some technical assistance to the French, helping them to design a more reasonable bulletproof propeller, which could basically determine the direction of the bullet's rebound at a fixed angle, so that the machine gun mounted on the nose could barely be used.

At the time, this device made the forward-facing machine gun barely usable, but compared to what Donald was now going to sell to the Germans, the gap was quite obvious. Because the technology recommended by Donald today allows machine gun bullets to shoot right through the gap in the propeller without injuring the propeller, in the original history, it was the Germans who invented this technology in 1915, and then for some time after that, their Fokker fighters equipped with this device caused a Fokker disaster for the British and French. Now MacDonald has just premeditated the catastrophe a little earlier.

In Scrooge's plan, the British and French would first get a whole bunch of use of the "Aerial Fish. Ray's attack aircraft, coupled with the barely usable fighter technology of the French, these things will occupy the skies of the battlefield and pose a serious threat to the German forces on the front line, and make the scales shift in favor of the British, and then they will sell the technology of the aircraft with this device to the Germans, let them go and fight the British planes, preferably sweep away the British and French planes, and then they can make another deal with the British and the French...... So, the world war is so beautiful.

The Germans were indeed very interested in the technology that would allow bullets to pass through the propellers, but MacDonald offered a very high price (supposedly more than the entire plane plus the "Fish in the Air. Ray "added up to the transfer fee) and insisted that they should only be allowed to see the samples after paying a certain percentage of the deposit. So the Germans hesitated for a while and simply bought the relevant technology of the Sea Breeze fighter and the "air fish. Thunder".

"When the French start production of fighter jets, the Germans will renegotiate the deal with us. And by that time, they won't feel that our prices are high. When Donald reported to Scrooge on the actions of the Germans, Scrooge replied.

"Didn't the Germans have a similar study?" Donner's asked.

"At least not yet. As for the future? Who knows. Scrooge smiled, one of the key players in the history of this invention was already working under MacDonald, and the other was unfortunately killed in a traffic accident two years ago.

"Donald, how are the Germans doing at sea these days?" Scrooge asked.

"After the destruction of the German strike fleet, the Germans began to attack with submarines, and in the past two months, they have sunk a number of British ships. The British now reverted to convoy formations, although the British were unable to provide escort services for all merchant ships for a while due to the limited number of escort ships. Now it is different from the attack ships, at that time there were still more stocks in Britain, and the scale of the war was not as large as it is now, and of course the consumption was not as large as it is now, so at that time, the British could still make the efficiency of the merchant ships a little less, and get together and wait for the escort warships to go together. At this, Donald sneered.

"But now, the situation is different, the war is so costly, and Britain and France need a lot of supplies every day, much more than before, so they can no longer tolerate a merchant ship waiting idle in the harbor for more than a week in order to wait for the escort warship. As a result, the route was full of merchant ships traveling alone. This, of course, gave the Germans a chance, so the number of their sanks kept rising. But the British are accelerating the production of destroyers, their production capacity is considerable, and they are also buying destroyers from us and other shipyards. Uncle, if we take all the orders that the British give us, we can make a lot of money, but I am afraid that the good days of the Germans will soon come to an end, because the submarines have little to do in the face of an escorted fleet. In this way, as the number of destroyers escorted increases, the loss rate of merchant ships will decrease rapidly, which will directly reduce the total demand for merchant ships, which is not a good thing. ”

Speaking of this, Donald couldn't help but frown.

"What's even more damn is the news, uncle, I think you probably already know that the British and French have made a lot of progress in underwater hydrophones, and they are even imitating bats and dolphins, developing a device that actively emits sound waves and then locates them by echoes. You know, in principle, such a device is quite possible. ”

"Yes, in fact, in large laboratories, such equipment has been successful." "And it was mounted on an experimental vessel, and successfully tracked down a potential submarine." The British and French must be willing to invest in this technology in the current situation. So, I think it won't be long before this kind of thing might be on their warships. Well, Donald, do you think we should take the contract to build destroyers for the British and French? ”

"Of course, uncle, because even if we don't pick up, someone else will. Instead of letting the money be earned by others, it is better to let us earn it. Even, uncle, I think the kind of equipment in the big lab will be better in performance than the one developed by the British and the French, right? Donald asked.

"Our technical capabilities are not necessarily better than those of the British and French. But after all, we do this research first, and under normal circumstances, our products will naturally be better. Scrooge replied.

"Then uncle, I think that if the British and French are technically successful, we should sell them this equipment at once, but this will in turn reduce the demand for building merchant ships."

It is also a common trick of the MacDonald consortium to sell more mature and cost-effective products to others when they have just made a technological breakthrough. Because in such a situation, it is difficult for the competitor's products to compete with MacDonald's products, so it is difficult to recover the large amount of research expenditure. At the same time, if any new technology wants to be perfected, it must accumulate a large amount of operating data and a large number of improved data. If the opponent's products are not widely used, the accumulation of these things will naturally be slow, which will keep them behind MacDonald.

In later generations, this trick was also very common. For example, the White Eagle Gang has been carrying out a technological blockade of the Red Rabbit Country, and whenever the Red Rabbit Country has developed a certain technology that breaks through the blockade, the White Eagle Gang immediately approves the sale of something similar to the Red Rabbit Country, but more mature, in order to attack the relevant scientific research of the Red Rabbit Country.

"It's not a problem to sell this thing to them." Scrooge replied, "The problem now is that we must try to help the German submarine forces to ensure that the balance is not easily upset." Donald, here's an important document, you go and get Greystone, look at it together, and then discuss it and see how you can get the contents of this document to the Germans without even noticing. Be careful, no one, including the Germans, will ever know that these things are being sent from us. It would be better to make the Germans feel that they had come up with this good idea themselves. ”

Scrooge said it again as he opened a safe in his office, took out a file from it, and said this to Donald.

"What is this?" Donald asked, confused.

"This is our latest research, a completely new approach to submarine warfare that will change the history of naval warfare." Scrooge said to Donald with a smile as he showed the name of the document. The name of the document that Donald saw was: "Wolf Pack Tactics".