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

This is the meaning of talking slowly, the kindness shown to Lin Zheng, Alex. Of course, Durand would not refuse, and said with a smile: "What a coincidence, I myself am a loyal green tea lover." Pen, fun, pavilion www. biquge。 infogeiliwx: "It's not the point whether it's a green tea lover or not, the point is that the two of them have a start to talk, and that's enough."

After 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 against Alex. Durand said: "Mr. Duland, I believe you have seen that this aircraft of our company 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 interrupts Alex. Duland's words, said with a smile.

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

Cessna is an aircraft manufacturing company, just like all aircraft manufacturing companies, Cessna itself does not produce 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 of the customers of the Cessna 172/182 series aircraft are aviation schools, for these aviation schools. In fact, the purchase cost is not the most important, but the most important thing is the maintenance and use cost, and the fuel consumption of up to more than 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. "This aircraft uses our company's latest electric drive engine, which has a maximum output of 60 kW and weighs only 80 kg. Combined with a lithium-ion polymer battery with a maximum capacity of 20 kWh, it can provide this aircraft with a range of 2.5 hours......"

"Oh God!" Alex. Durand couldn't hold back any longer, and exclaimed, "What did you say? You say that this aircraft can provide 2.5 hours of endurance? ”

Alex. Durand is so excited, although he has heard that there are Chinese testing an electric Cessna 172 in the United States, but the details are not very clear. Durand thinks that this plane is amazing, that is, it can fly for about an hour, and may not even be able to fly for an hour, but now Lin Zheng told him that this plane can fly for 2.5 hours?

"That's right. That's 2.5 hours, 150 minutes ......"

Before Lin Zheng's words were finished, Alex. Durand interrupted again, and he said eagerly: "It's incredible! Mr. Lin, can you tell us more about the performance data and cost of this 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 in a hurry.

"......" 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 powertrain is replaced with reducer oil every 50 flight hours. Basically maintenance-free and costs less than $6 per hour to use......"

In the field of light aircraft, piston engines are widely used, 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 engine used in the paramotor and power delta can even reach 1:6 to 1:7, i.e. the engine can provide 6 to 7 kg of thrust for every 1 kW of power output. The situation of the aircraft is different, considering the life and durability of the engine, this ratio basically fluctuates around 1:4, and even 1:5 in some extreme cases. The two motors of Lianchuang Technology can provide a maximum power of 60kw, and a new carbon fiber 3-blade propeller with higher efficiency is selected, with a power/thrust ratio of 1:5.2, which can provide a maximum thrust of 312 kg, pushing such a small aircraft weighing more than one ton, with a lift-to-drag ratio of up to 0.3, and it is no problem to promote such an aircraft to fly.

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

Alex. Durand was completely excited: the cost of using it was less than $6 an hour? 2.5 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 unfold in front of him, but soon, with Lin Zheng's next words, Alex. Durand realized that it was not about to be laid out 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 felt the urge to die, excited to death......

Compared with electric aircraft, one of the biggest advantages of traditional fuel-powered aircraft is that its dead weight is constantly decreasing: during the flight, as the aircraft continues to consume fuel, the weight of the aircraft is also constantly decreasing, and the landing weight of large commercial aircraft is even more than 40% lighter than the take-off weight, but the electric aircraft does not have this advantage, the aircraft is heavy when taking off, and it is still the same weight when landing. There will not be the slightest change.

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

2-seater/4-seater light fixed-wing aircraft such as the 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 every certain number of flight hours of the aero engine, even if the spare parts that need to be replaced are still working in good condition.

Limited by the huge cost of fuel and maintenance, even the United States, which claims to be the number one country for 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 number of "toy" private jets left for the middle class is only 278000, and the reason why there is only such a small number is because fuel expenditure and engine maintenance expenditure are the two largest expenses of the aircraft, and they are also the obstacles that hinder the aircraft from moving towards more families - a simple conversion can be calculated that the most rudimentary Cessna 172 is equivalent to a fuel consumption of nearly 30 liters per 100 kilometers, compared with the Japanese car with a fuel consumption of only seven or eight liters, who can afford Nima?

But if an airplane costs less than $6 per flight hour, a simple conversion shows that it costs less than $3 per 100 kilometers, which is 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.

Cessna has worked hard for decades. Only then did they sell a total of about 50,000 Cessna 172/182s, and if an electric engine could be optional, Alex. Durand thinks that selling 10,000 Cessna 172/182s a year is not a problem - as for whether this will cause airspace blockage, it is not a problem for Cessna to consider, anyway, in the United States, the airspace below 3,000 meters is free.

That's a lot to say, but in Alex. In Duland's mind, these were just flashes of time, he eagerly grabbed Lin Zheng's hand, and said enthusiastically: "Mr. Lin." It's a genius idea to replace an airplane with an electric engine, and you've done a great thing, like Henry. Mr. Ford invented the Model T as great! Cessna is honored that you have chosen our products. If there's anything you need Cessna to help with, be sure to ask. Cessna is happy to help and support you in any way...... Well, I wonder if it is convenient for our test pilots to test fly your aircraft? We brought our own pilots this time. Cessna Company took the initiative to send the benefits, of course Lin Zheng would not refuse, he also understood that Alex. The reason why Durand wants their pilots to fly this plane is that they can see it. He immediately smiled and said, "It's my honor." The operation of this aircraft is no different from that of a normal Cessna 172R, a brief introduction will be sufficient, 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 looked like a rabbit with an arrow in the buttocks, howling and saying to the foreigner who came with him: "Tom, Tom, quick, 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 nearby airspace has become a no-fly zone for civil aircraft, and as long as the temporary airspace is applied, basically can be applied for, except for 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?

Excited old face flushed Alex. Durand didn'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. Durand had to respect Scott's suggestion, and he immediately nodded and said, "Okay, there's 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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