"Wood can be used as a propeller?"

Alex Goodrich thinks this thing is really amazing: Shouldn't the aircraft propeller be made of various special metals, alloys, and even composite materials? I heard that some companies have begun to study the use of carbon fiber to make propellers, and wood is so light and so low in strength that it can be broken by stomping on it with a single foot, and it can be used as a propeller for an aircraft?

He always felt that Chen Geng was lying to him.

"Why can't wood be used as a propeller?" Professor Scott Chapman glanced at Alex Goodrich like a stupid X, it was the first time he had encountered such an ignorant fool as a tutor for a master's student in aeronautics at Caltech.

Yes, in order to determine the appropriate shape and size data of the propeller blades, Chen Geng specially contacted Professor Scott Chapman of Caltech.

How good is Caltech in aerospace, it is not necessary to say too much, and there is also a suspicion of cheating the number of words, for all readers who read this book, you just need to know that Qian Lao, the founder of China's "two bombs and one star", is a student of aeronautics and astronautics at Caltech.

Although Scott Chapman is not a famous aviation expert, he is just a very "ordinary" master's tutor in aeronautics at Caltech, but since he can become the best master's tutor in aeronautics in the United States, it is easy to help Chen Geng design a suitable propeller, which is not much more difficult than drinking water.

Alex Goodrich felt that his heart had been hit by 10,000 critical points, and he suddenly turned his head to look at Chen Geng.

Chen Gengqiang couldn't help but smile and told him: "Don't you know that in the First World War, most of the propellers of airplanes were made of wood? Even in the early stage of World War II, many airplanes used wooden propellers. ”

Looking at Scott Chapman's face that clearly read, "You don't even know such a simple thing!", Alex Goodrich instantly despaired, and he looked at Chen Geng with a resentful expression: Since you already know that wood can be used as a propeller, why haven't you told me all the time?

He felt that he had been pitted by Chen Geng.

Chen Geng shrugged: You don't know that I'm going to explain it to you, why?

Professor Scott Chapman was too lazy to talk to an idiot like Alex Goodrich, but when he looked at Chen Geng, he became very kind: "Although the materials and processes of the propeller have been developed for so many years, the wooden propeller is still the best source of thrust for ultralight aircraft. ”

After seeing the fax of the power delta wing sent to him by Chen Geng, Professor Scott Chapman was excited: For a long time, although the United States has claimed to be the country with the most private aircraft, taking the data released by the US Department of Transportation in July 1797 as an example, the number of private aircraft in the United States is less than 310,000?

Among them, more than 90% are the kind of single-engine, piston internal combustion engine as the power, usually only two or four people of ultralight aircraft, but this kind of aircraft, for the vast majority of Americans is too expensive, known as the world's most successful, with a total production of more than 35,000 (yes, it is sold so many, more than 35,000), with "air bicycles" The name of the Cessna 172 aircraft as an example, this aircraft began production as early as 1956, using a 145 horsepower piston gasoline engine aircraft, except for the ability to seat four people, other configuration is completely absent, the reputation of "air bicycle" is really not wronged at all, just like a bicycle to nothing.

As a person in the aviation industry, Professor Scott's long-term wish is to promote airplanes into private homes, but it is a Cessna 172 that sits in a large aircraft that does not have a small QQ space, and the price starts at 70,000 US dollars, Scott is anxious, he has been trying to find a cheap aircraft program, but there has been no result for a long time, you can imagine how excited he was when he saw Chen Geng's fax of the power delta wing.

Also because of his excitement, he has been working overtime to help Chen Geng design several sets of propeller schemes in the past few days, with two-blade propellers and three-bladed propellers, but no matter how many blades of propellers, without exception they have adopted low-cost wooden propeller schemes to help Chen Geng reduce costs as much as possible.

Handing these sets of propeller solutions to Chen Geng, Professor Scott said proudly: "If laminated maple wood is used as the manufacturing material of the propeller and processed by CNC machining equipment, the cost of a set of 1.5-meter double-bladed propellers can be reduced to about 20 US dollars!"

Can you build a pair of propellers for only $20?

Alex Goodrich, who had just been hit, suddenly began to glow green in his eyes: Nima! Before a pair of propellers asked Lao Tzu for 80,000 US dollars, and he had to wait two months to get it, now the cost of a pair of propellers is only 20 US dollars, and the wood should be easy to process, and it is estimated that it is not a matter of processing 100 sets a day......

Thinking of the steady stream of green bills pouring into him, Alex Goodrich's saliva flowed.

Professor Scott glanced at Alex Goodrich in disgust, obviously very dissatisfied with this guy who got into the eyes of money, and turned to Chen Geng and said: "Mr. Fernandez, you can call me if you have any questions, I am looking forward to seeing your power delta wing appear on the market as soon as possible." ”

Chen Geng solemnly expressed his gratitude to this respectable professor, he wanted to give Professor Stark a sum of money, but he didn't want it at all, the only requirement was to hope that after this power delta wing was launched in the future, the price would be as cheap as possible, which made Chen Geng feel emotional.

..............................

"This thing is not suitable for the Army!"

It was Alex Goodrich's cousin's first words when he saw this power delta wing a month later.

"Why?" Alex Goodrich, who was originally counting on selling this thing to the army, was stunned when he heard this, and subconsciously looked at Chen Geng: Didn't you say it, isn't this thing very suitable for special operations missions?

"There's a helicopter, who's going to use this thing. Alex Goodrich's cousin's eyes were full of contempt for this thing, which was no different from the Three Jumpers, and of course, as the world's most powerful army, he had good reason to despise it.

Alex Goodrich is stupid: after a month of hard work, how can the dream be shattered?

Xu knew that the sales of this thing were closely related to his income, Alex Goodrich's cousin held his chin and thought for a moment, and suddenly slapped his thigh heavily: "This thing is not suitable for the Army, but I think it is okay for the National Guard,"

After speaking, he nodded heavily: "That's right, it's the National Guard, whether it's the Army National Guard or the Air National Guard, especially the Air National Guard, this thing is simply tailor-made for them." ”

Sold to the Air National Guard?

That's right, Chen Geng, who was also in frustration, heard this, his eyes suddenly lit up, why can't he sell it to the National Guard?!

The Air National Guard of the United States, although it does not have any outstanding records, has a fine and glorious tradition: I have what the big brother of the Air Force has, and I have to have it!

Adhering to this glorious tradition, the US Air National Guard is equipped with almost all the main equipment of the US Air Force in active service, the latest F-15 and F-16 fighters, and the F-4, F-5, F-104, F-111, A-10, KC-135, C-130 and other main fighters, bombers, transport planes, air tankers, and various transport helicopters and gunships of the US Air Force in active service......

Wait, there's no shortage of the same!

Think that's OK?

It's still early.

After the end of the Cold War in another decade or so, the US Air National Guard will still be equipped with B-1B "Lancer" strategic bombers, and you say that you are a national guard, which is equivalent to a collection of domestic militia and armed police, and what is the matter with equipping B-1B strategic bombers with a certain stealth attack capability? Who are you going to fight? Is it to fight drug dealers or the five major gangs? Is it to fight the mafia or to fight the Russian MOB?

But if you think this is already the extreme of the US Air National Guard's madness, then you are too young: in 2008, after the world's first real stealth fighter F-22 "Raptor" entered service, seeing that the Air Force had a new toy, the National Guard immediately quit, and rolled around with Congress to ask for F-22, what the second-class people wanted, we also wanted!

In the end, they really succeeded in blackmailing from Congress, and I don't know how they fought under the table, and finally the US Congress gave the Air National Guard a whole squadron of F-22, that is, the Texas 149th Squadron stationed on the territory of the "Red Necks".

It can be said that in addition to the flagship treasure of the US Air Force: the B-2 stealth bomber, the US Air Force has good things, and the US Air National Guard is the same and a lot!

A few years later, the rabbit family also inherited the glory of the U.S. Air Force National Guard: what the air force of the Thief Eagle family has, the puppets must have!

Alex Goodrich's cousin continued: "I have a classmate who is in the National Guard, and I can contact him and see what he has to say...... Mr. Fernández, if it is sold to the National Guard, my share will not be less, right?"

"It's definitely a penny!" Chen Geng nodded in response.

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PS: Brothers, I'm sorry, tomorrow the millennium is going to go to a trip to Chengdu @ Du, go back on the same day, if you come back in time, just 2 more, if you come back too late, a more 4000 words, and the 2000 words you owe you will make up the day after tomorrow.