"The AF-DB660 provided by Mercedes-Benz has been used on the BF-1, and it is the only one of the four solutions that has a service model, and two can meet the requirements. The second is Porsche's PS-CB670, which is slightly better in power, but it is a star-shaped engine, which will take up more space. The third is Fokker's in-line liquid-cooled engine, F-550, although the power is small, but the stability is high, and it can meet the requirements with 4 units. The fourth is BMW's BM-450, a 36-cylinder twin-exhaust cooled engine with a compact layout that can also meet the requirements with six units. Junkers said all four options.

Eric understands why Junkers is entangled, there are a little bit of the four options, Mercedes-Benz and Porsche seem to be not much different, but for the president's car, every little more power can be a little more redundant in protection, while the Fokker route is different, taking a steady and steady stability. BMW's is completely taking advantage of the small space, my horsepower is small, but I also occupy a small space, your two AF-DB660 occupy the same space as my six.

It's not just Junkers who has a hard time, but Eric is also in trouble.

"Let's take a look first." Eric intends to put this issue aside for now.

As the two men walked under the belly of the plane, Junkers pointed to a section of the plane that had not yet been sealed, through which the beams could be seen.

"This is a load-bearing beam that runs from the nose to the tail, a total of 6, 3 in the belly, 1 on each side, and 1 on the top." Junkers pointed to a silvery-white metal plate about 20 centimeters long. "This is the latest composite material from Haber."

"It's fiberglass, right?" In order to verify his idea, Eric deliberately found the scraps he had collected, picked them up and looked at them to confirm his guess.

"How dare you use it, this thing is very expensive. Isn't it too wasteful to use it to make belly. Eric's words are true, the seemingly brittle name of glass fiber is actually a combination of aluminum, special steel, super-tough plastic, and brushed fiberglass. The weight is also not light, a little heavier than the Super Dura aluminum, which is not suitable for fighter jets that need to be maneuvered.

"Do belly?" Junkers was stunned for a moment, then waved his hand and said, "The entire fuselage is made of this fiberglass." ”

"What?!" Eric was a little overwhelmed, how much did it cost.

"This is to ensure the balance of the body to the greatest extent, and if more than two materials are used, there will be weaknesses in the structure." Junkers thought Eric didn't understand and hurriedly explained.

"Have you ever calculated how much it costs to use all of this material?" Eric is still not too optimistic.

"I have calculated, all the expenses of the whole machine need 80 billion." Junkers didn't spend his own money anyway, so he had no idea at all.

"Oh my God... Does the Prime Minister know about this? Eric asked weakly.

"Yes, Mr. Prime Minister also said that if necessary, you can." Junkers then added. "The Cabinet has agreed, Mr. President."

"Even Armar agreed?" Eric still doesn't believe in the 1 billion spending, and Yarma can easily agree.

"Minister Yarma was the first to agree, and he also persuaded the prime minister." Junkers said with a smile.

Eric also instantly woke up when he heard this, he was in the Tao, the original plan of 17.2 billion marks was not all for the construction of Lufthansa 1, but more to stimulate the domestic aviation industry, on the basis of the existing domestic air transport in various countries to lead the trend of international flights again, design and manufacture transoceanic air transport aircraft.

The reason why the cabinet agreed so happily also means that it wants to make more foreign exchange as soon as possible, the development of Germany has taken off because of the national infrastructure project in 1919, and in 1920, although it still developed rapidly with the residual heat of 1919, it did not have that momentum and needed more external stimulus.

I think Junkers and Dinah also have this in mind about selling the AF-990.

"You tell me the truth, do you have any gain from participating in the design of this aircraft?" After starting the RM-30, Eric came up with the idea of a Junkers-designed aircraft with a fresh and unrefined name, called the Cannon Bird. This thing is an anti-armor artifact, if it is combined with the observation and sighting equipment and the high muzzle velocity of the countersunk projectile, the characteristics of straight ballistics, it is simply an armor buster.

"What do you mean, Mr. President?" Junkers was puzzled.

"Do you think this plane will have a future if it is equipped with cannons?" Eric said half-jokingly, after all, there are indeed weapons like gunboats in later generations, but they are of very little use, and encountering troops with air supremacy is simply a food delivery.

"This... Defensive weapons are still no problem, with artillery? It doesn't make sense..." Designers like Junkers are not utopians, they are pragmatists, and the design of installing cannons is really a bit unrealistic.

"No, I mean build a big plane and put a large-caliber cannon on it to counter ground armor." Eric said the concept straight away.

When Junkers heard this, he pondered for a moment, then looked at the Lufthansa 1 and said for a while: "Mr. President, with all due respect, it is really unnecessary, I think no one will buy such an aircraft even if it is designed." Of course, if it is sold to France or England, they will definitely want it. ”

"What do you mean?" Eric didn't understand a little, why didn't his own people buy it, but France and Britain wanted to buy it?

"China's tank technology has always been at the forefront, other countries are mainly referring to and imitating us, in the final analysis, our armor is stronger, in this case, to deliberately design an aircraft for opposing armored forces, is really not very useful, and the air force is easily affected by the weather, the efficiency of sorties will not be very high." After all, Junkers has designed and built many military aircraft, and this concept and association ability still exists. That's the benefit of being older, be realistic.

After hearing this, Eric also felt a little abrupt, Germany's current armored forces are already in the stage of their own crawling, that is, the lack of competitors, leapfrog development has thrown Germany's armored forces behind several opponents, in armor protection, artillery performance, ammunition technology has made great strides in development. This is why when the paper data of the III tank was not high, the army did not plan to develop the IV, not even a plan, but began to develop other derivative variants on the basis of the III, because the paper data of the III is now difficult to meet the opponent.

Eric knew history well and knew that if Germany continued to expand, it would always touch the bottom line of the Soviet Union, and a major war would be inevitable, but he knew that it was one thing, and the development of the army would not change because of a false assumption of speculation.

Otherwise, he would not have put Toth in the position of Air Marshal in order to develop strategic bombing troops.

Eric, who was full of thoughts, felt a little chill when he thought that although Germany was developing rapidly, it was stopped because there was no opponent.

"People have to know that they are prepared for danger in times of peace, this status quo is not good, and it must be changed." Eric was determined to change the status quo, and then he made a mistake.

"It's a nice thing to say, but this aimless development of armaments will have to affect domestic economic construction..." Eric was torn.