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"You're talking about this plane?" Lin Zheng smiled: "Of course you can, why don't we go over there and have some tea?" ”

This is the meaning of chatting slowly, and of course Alex Durand will not refuse the kindness expressed to Lin Zheng, and said with a smile: "What a coincidence, I myself am a loyal green tea lover." Pen @ fun @ pavilion wWw. ｂｉｑUｇE。 infonovelし"

Whether it is a green tea lover or not is not the point, the point is that the two have a beginning to chat, which is enough.

Sitting under the parasol and drinking a cup of tea, after chatting a few words, Lin Zheng pointed to his company's electric twin-engine version of the Cessna 172 and said to Alex Durand: "Mr. Duland, I believe you have seen that our company's aircraft is improved on the basis of your company's Cessna 172R." ”

"Yes, I can see that," Alex Durand nodded, he came for this today, curiously glanced at the nondescript twin-engine version of the Cessna 172, and said, "When I was in the United States, I heard that there was an aircraft manufacturer from China testing their electric aircraft ......"

"Excuse me, we are not an aircraft company, we are just a new energy power company." Lin Zheng interrupted Alex Durand's words and said with a smile.

"Are you a new energy power company?" Alex Duland's eyes lit up suddenly.

Cessna is an aircraft manufacturing company, just like all aircraft manufacturing companies, Cessna does not produce its own engines, the engines they use in the Cessna 172/182 series come from Lycoming or Continental, the price of each power system is expensive, accounting for almost 40% of the entire aircraft, the cost advantage of electric drive technology is clear to every company, but limited by technical factors, there is no mature aviation-grade electric drive technology. If the Chinese company's electric drive technology is advantageous enough, Cessna's choice of their powertrain also seems like a good choice?

You know, many customers of Cessna 172/182 series aircraft are aviation schools, for these aviation schools, the procurement cost is not the most important, but the most important is the maintenance and use cost, and the fuel consumption of up to 60 liters per hour makes the major aviation schools very painful, but the electric drive saves too much.

"That's right, we are a new energy power company," Lin Zheng solemnly pointed to the Cessna 172 not far away. To Alex Durand, he said: "This aircraft uses our company's latest electric drive engine, the maximum output of the two electric engines is 60kw, but the weight is only 80kg. Combined with a lithium-ion polymer battery with a maximum capacity of 20 kWh, it can provide this aircraft with a range of 25 hours......"

"Oh God!" Alex Durand couldn't hold back any longer and exclaimed, "What did you say? You say that this aircraft can provide 25 hours of endurance? ”

Alex Durand was so excited, although he had heard that the Chinese were testing an electric Cessna 172 in the United States, but he was not very clear about the details, just with long-term experience. Alex Durand thought the plane was amazing, that is, it flew for about an hour. He may not even be able to fly for an hour, but now Lin Zheng told him. How can this plane fly for 25 hours?

"That's right, 25 hours. 150 minutes ......"

Before Lin Zheng finished speaking, he was interrupted again by Alex Duland, who said eagerly: "It's incredible! Mr. Lim. Can you give me a detailed account of the performance data and cost of the aircraft? ”

"Of course, I mentioned earlier that our aircraft uses two electric motors with a total power of 60kw......"

"That's right." Without waiting for Lin Zheng to finish speaking, Alex Durand said hurriedly.

"......" was a little depressed, and then Lin Zheng continued: "The entire power system includes a lithium-ion polymer battery system and battery control system with a total weight of 132 kilograms, a 20-kilogram battery cooling system and an 80-kilogram engine, and the overall weight is slightly lower than that of the Cessna 172 in the full state.

With the use of more efficient propellers, the two electrically driven engines can provide the aircraft with 312 kg of thrust; The entire power system, with the exception of a reducer oil change every 50 flight hours, is basically maintenance-free, and the cost of use is less than $6 per hour......"

In the field of light aircraft, piston engines are commonly used, and depending on the propeller efficiency and the number of blades, the power/thrust provided by a piston engine is not 1:1, and the power/thrust ratio provided by the low-power engines used in paramotors and power delta wings can even reach 1:6 to 1:7, that is, the engine can provide 6 to 7 kg of thrust for every 1kW of power output. The situation of the aircraft is different, considering the life and durability of the engine, this ratio is basically up and down 1:4, and some extreme ones will even do 1:5, these two motors of Lianchuang Technology can provide a maximum of 60kw of power, and a new carbon fiber 3-blade propeller with higher efficiency has been selected, with a power/thrust ratio of 1:52, which can provide a maximum thrust of 312 kg, pushing such a small aircraft with a weight of more than one ton, with a lift-to-drag ratio of up to 03, It's no problem to push such a plane into flight.

"Oh God! Less than $6! My God! My God! ”

Alex Durand was completely excited: the cost of using it is less than $6 per hour? 25 hours of battery life? As an executive at a civil aircraft manufacturer, he knows all too well what that means – aviation schools around the world are rushing to him to produce this new electrically driven aircraft for aviation education.

He seemed to see a golden avenue about to appear in front of him, but soon, as Lin Zheng's next words came out, Alex Durand realized that it was not about to be paved in front of him, but already in front of him......

"The most important thing is that we took into account the need for upgrades from the beginning, so all the Cessna 172s in use now can be upgraded to electric engines."

Alex Durand suddenly had an urge to die, excited to die......

One of the biggest advantages of traditional fuel-powered aircraft compared to electric aircraft is that its dead weight is constantly decreasing: during the flight, as the aircraft continues to consume fuel, the dead weight of the aircraft is also constantly decreasing. The landing weight of large commercial aircraft is even more than 40% lighter than the take-off weight, but electric aircraft do not have this advantage, the aircraft is heavy when taking off, and the weight is still the same when landing, and there will be no change in the slightest.

But electric-powered aircraft also have an advantage that traditional aircraft can't match, and that is the extremely low cost of ownership.

For example, 2-seater/4-seat light fixed-wing aircraft such as Cessna 172/182 need to use high-grade aviation gasoline, and the consumption of aviation gasoline per hour is basically more than 60 liters, not to mention the maintenance and replacement of spare parts that must be done by aero engines every certain number of flight hours, even if the spare parts that need to be replaced are still working in good condition.

Limited by huge expenses on fuel and maintenance. Even the United States, which claims to be the first country of private jets, only has about 300,000 private jets, excluding the luxury jet business jets owned by the rich, big business, and big conglomerates. The reason why there are only such a small number of "toy" private jets left for the middle class is because fuel expenses and engine maintenance expenses are the two largest expenses of airplanes, and they are also obstacles to the development of airplanes to more families - a simple conversion can be calculated that the most humble Cessna 172 is equivalent to a fuel guzzler with a fuel consumption of nearly 30 liters per 100 kilometers, compared with Japanese cars with fuel consumption of only seven or eight liters. Who can afford Nima?

But if an aircraft costs less than $6 per flight hour of use. A simple conversion shows that the cost of use per 100 kilometers is less than $3. Isn't that cheaper than using a car? Nima: This is simply a great achievement comparable to the Ford Model T.

Alex Durand was already going crazy with excitement.

It took Cessna decades of hard work to sell a total of about 50,000 Cessna 172/182s. If an electric engine is an option, Alex Durand doesn't think it's a problem to sell 10,000 Cessna 172/182s a year – and whether it will cause airspace congestion is not something Cessna needs to consider. Anyway, in the United States, the airspace below 3,000 meters is free.

It's a lot to say, but in Alex Duland's mind, these are just flashing things, he eagerly grabbed Lin Zheng's hand, and said enthusiastically: "Mr. Lin, replacing the plane with an electric drive engine, this is really a genius idea, you have done a great thing, just like Mr. Henry Ford invented the Model T!" Cessna is honored that you have chosen our products. If there's anything you need Cessna to help with, be sure to ask, Cessna will be happy to help and support you in any way you can...... Well, I wonder if it is convenient for our test pilots to test fly your aircraft? We brought our own pilots this time. ”

Of course Lin Zheng would not refuse the benefits that Cessna Company took the initiative to send, and he also understood the reason why Alex Durand wanted their pilots to fly this plane. Immediately smiled and said: "This is my honor, this aircraft is no different from operating an ordinary Cessna 172R, a brief introduction is enough, but the test flight ...... Do you need to apply for airspace from the competent authorities? ”

"No problem, these are not problems, just leave the airspace application to me to arrange......" Lin Zheng agreed so happily, Alex Durand immediately howled like a rabbit with an arrow in the buttocks, howling and saying to the foreigner who came with him: "Tom, Tom, hurry, you go and call Scott, now!" Immediately! ”

Alex Durand is so confident that he can apply for temporary airspace, the reason is very simple, considering that there are companies at the air show suddenly put forward the requirements of the air show, a large area of airspace nearby has become a no-fly zone for civil aircraft, and as long as the application for temporary airspace, basically can apply for it, except during this air show, there is no such treatment at any other time, as we all know, the republic's management of airspace can be called the strictest in the world......

……………………

Scott was a test pilot at Cessna...... It's an exaggeration to say he's a test pilot, but just look at his look of a man with huge toad glasses and chewing gum in his mouth, and he doesn't care about anything, you know that this guy is obviously a skilled old pilot.

Full of cooking fan, as long as you look at the appearance of this guy's veteran oil, you will know that the book is definitely from the United States Air Force.

Just when Lin Zheng was still wondering what this guy's level was, Scott, who didn't care about it, saw this weird twin-engine Cessna 172R, and subconsciously took off his glasses: "**! ”

Anyway, he is also a veteran pilot of Cessna Company, and Scott can see at a glance that this is a Cessna 172R, but a twin-engine Cessna 172R? Also, why haven't you added the appearance of this engine yourself?

Alex Durand, who was flushed with excitement, couldn't care about Lin Zheng, and pointed to the Cessna 172R of Lianchuang Technology and said to Scott: "Hey, Scott, you know what? This is a pure electric 172R, do you want to try it? ”

"An all-electric Cessna 172R?" Scottden was startled when he cooked Van Fan: "Boss, are you sure you're not kidding me?" ”

"Do you think I'm going to joke with you?"

"Well, it's not like that," Scott shrugged, looked at the twin-engine version of the Cessna 172R, and said with an interested look in his eyes, "Not enough to look interesting, what's the maximum thrust?" ”

"312 kilograms."

"Oh, that's good," Scott nodded, "Is there an operating instruction?" I need to take a look. ”

In this sentence, Lin Zheng's evaluation of Scott of Hangerlangdang's dishes is another layer higher: This guy is a hanger, but he is still quite reliable.

There is not much difference between this electric version of the Cessna 172R and the ordinary version of the 172R in terms of operation, to say that the difference is nothing more than the subtle difference between the two different power systems in operation, after looking at it for about half an hour, Scott finally raised his head, nodded and said: "OK, no problem, I can fly, but out of prudence, I recommend flying only some simple actions." ”

For any aircraft manufacturing company, an experienced veteran pilot like Scott is a valuable asset, and Alex Durand must respect Scott's advice, he immediately nodded and said: "Okay, there is no problem, you have the final say on how to fly." ”

"Then no problem, boss, I need to get ready, you can go and apply for temporary airspace." (To be continued.) (。 ))

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