For example, it is like the meter that Zhang Lan is now leasing to the military - "Light ~ heavy multi-purpose transport gunship, it looks very powerful, the load capacity alone exceeds 20 tons, and the rotor alone uses an unprecedented eight pieces!" So far, no single-rotor has used more rotors than a helicopter.

Every time the meter -- from the air to the ground, if it is on hardened ground, if it is in the field, the ground conditions are not good enough, the eight rotors of the meter-helicopter with a diameter of up to 32 will be blown off the ground, and even if it lands on the grassland, the grass on the ground can be blown into grass blades, and even the grass will be uprooted by two roots! But when the helicopter landed, the speed of its rotors was only 132 revolutions per minute! It's far from the thousands of revolutions of a car engine.

The U.S. Apache gunship, capable of reaching a top sprint speed of 365 km/h, is inextricably linked to the pair of small wings on both sides of its fuselage that can be used as wings that provide additional lift while flying, and can also act as weapon pylons. If you don't believe me, you can ask the Americans to remove the pair of small short wings on either side of the Apache and see if the plane can fly so fast! Even if you kill it, you won't be able to fly at this speed.

The United States was also aware of the shortcomings of the rotorcraft, so it developed an aircraft that had two different modes of operation: the V-"Osprey" tiltrotor -- of course, there are also those who call this kind of aircraft a deflector-wing plane, but they all mean the same thing -- this kind of aircraft can take off and land vertically like a helicopter and can also take off like a fixed-wing plane equipped with a turboprop engine. If the V-22 "Osprey" tiltrotor takes off by a run, the range of the V-22 "Osprey" tiltrotor can reach 3,336 km, while the range of vertical take-off is only 2,225 km, and the range of a run-off can be more than 50 percent higher than that of a vertical takeoff.

After rising into the air, the V-"Osprey" tiltrotor converts its engine from the rotor working state to the working state of a propeller-type fixed-wing aircraft. At this moment, the V-"Osprey" tiltrotor can fly at twice the speed of an ordinary helicopter -- its cruising speed at this time is 510 kilometers per hour, while the ground cruising speed of an ordinary helicopter gunship is only about 250 kilometers per hour.

"However," Xiao Chenxi was a little late, "Since it is a small private helicopter, although most of the small private jets take into account the price factor, most of them use piston engines, but it is not impossible to use turboshaft engines, but for cost considerations, if you use a turboshaft engine with an output power of 1900 horsepower TV3-117VMM, is it a bit too luxurious?" Not only is the price of this engine too expensive, and the maintenance cost is relatively high, but when the speed of the aircraft exceeds 250 kilometers per hour, the actual efficiency of the engine is only too wasted. And the higher the speed, the more power is wasted, when the maximum speed reaches the highest speed of 380 kilometers per hour, the efficiency of the engine is only, very amazing figures! The rest was all wasted. ”

"Well," Hearing Xiao Chenxi say this, Zhang Lan pondered, if so, it seems that it is indeed a bit of a waste, and the price of the TV3-117VMM turboshaft engine is even enough to buy a light helicopter, even if he can afford it, Uttarene Schmidt may not be able to afford it, it is indeed not very cost-effective. Thinking so, Zhang Lan asked Xiao Chenxi, "Do you have any good suggestions?" ”

"The method is very simple, and there are two," Xiao Chenxi put up two fingers, "The first way is to give up the high-power turboshaft engine and use a less powerful turboshaft engine instead, for example, the turboshaft-type A turboshaft engine used on the Zhijiu helicopter that your country is using now is good, and the power of a single engine with 710 axle horsepower has exceeded the output power of the four-piston internal combustion engine carried on the Robinson R44 helicopter several times.

I have calculated that even with this turboshaft-type A turboshaft engine, relying on this excellent aerodynamic shape, I designed this helicopter to reach a top speed of about 310 kilometers per hour, and the cruising speed can also be maintained at 265 kilometers per hour, which is quite fast for a small private helicopter, and the Cruising speed of the Robinson R44 helicopter is only 218 kilometers per hour. ”

"Well," Zhang Lan nodded, and casually dragged a piece of paper to write and draw there, "This method is good, indeed, it is more convenient to purchase engines from China than from abroad, at least in terms of engines, we don't have to worry much about the government getting stuck in our necks; We can handle the avionics system ourselves, and we can also get it in China if we can't do it, and it's not a very complicated and sensitive thing, and we know that we want it

The relevant departments have been instructed to cooperate with us in this regard, and this is not an external situation when we can produce our own turboshaft engines in the future, but also our own engines. In addition, even if we use this turboshaft-A turboshaft engine, we can design several models for different purposes according to the needs of customers. For example, the elongated light multi-seater business type that can seat more people, and the light business truck transport type that can be used to carry people and transport people at the same time, etc. ”

"That's it." Xiao Chenxi nodded, "This method is good. "Of course it's good, this method was originally added to the idea of Xiao Chenxi's first method, how bad can it be?

"And what about the second option?" Zhang Lan asked.

"The second method is of course simpler," Xiao Chenxi sat next to Zhang Lan, dragged the piece of paper that Zhang Lan had just written and drawn, and then wrote and drew on it, "We can subdivide this helicopter and then choose to assemble different engines, the models equipped with turboshaft engines are for the mid-to-high-end market, and similarly, we can also develop models for the low-end market, just like our Kirin series cars, although the appearance is the same, but the engines are different, We can also develop a model with a relatively inexpensive piston engine for this low-end consumer market to surpass the Robinson R44 aircraft. ”

"It's a good idea, indeed." Zhang Lan nodded, admiring Xiao Chenxi's idea in her heart: Why didn't she think of this? ,

Of course, in order to adapt to the high-altitude performance, this piston engine does not need to be equipped with a turbocharged engine forced air intake system in terms of air intake, so as to ensure that the engine can still work normally at 2000 meters to 3000 meters in the air. Similarly, in order to control costs, the avionics system on board the aircraft should also be further streamlined, in addition to the avionics equipment necessary for flight safety, other avionics systems should not be considered, as for the modern integrated glass cockpit display system, it is even more unthinkable. It's all about streamlining costs, no, it's about making customers buy better things for the least amount of money. ”

At the end, Xiao Chenxi also laughed.

This girl has also learned from Zhang Lan over the years. However, I have to admit that if you want to gain a foothold in the fiercely competitive private aircraft market, this method is indeed the best way, only one engine is indeed no way to open the market, and if you want to gain a foothold in this relatively small market, the only way is to have many models, good quality, and have their own unique advantages.

"This is a good idea!" Zhang Lan smiled, "That's it." ”

"And now?" Xiao Chenxi asked, "Do you still inform Singh and ask him to get all the spare parts of the three sets of Mi-1711 from the Trans-Baikal Military District?" ”

"There are eight TV3-117VMM turboshaft engines used in Lao Maozi's Mi-1711," Zhang Lan thought for a while, "Although it can't be used so much, what can't be used can be kept as spare parts in the future." It would be nice to have two sets of fuselage parts, and we will make the fuselage for Uttarene Schmidt, and we need three sets of avionics systems. Well, tell them that we don't want all weapons systems. ”

Now in China, there are some things that need to be avoided, and it is just a matter of private helicopters, and it can be done by walking around, but if private individuals have armed helicopters with weapons and equipment? It seems hard to say.

"Okay," Xiao Chenxi nodded, "I'll inform Singh." ”

Zhang Lan still has a plan, but now his company's hardware equipment is not up to scratch and cannot be produced, and when necessary, he may be able to take it out, but now, Zhang Lan doesn't mind taking out his plan and talking about it.

"Can we build an aircraft like the American V-tiltrotor that can take off and land vertically and also take off in short distances?" Zhang Lan thought for a while and asked Xiao Chenxi and Alice, "While achieving such an effect, can you reduce or directly remove the immature aspect of this kind of aircraft, that is, it is easy to break down and fall?" ”

"There is no difficulty in design," Xiao Chenxi frowned and didn't think about it, "The key design part can also be handed over to Brother Tian and Red Spider to complete, on our planet and Brother Zhuzi's planet, this technology has actually been eliminated for a long time." But now the production accuracy of these production lines we have brought is not up to the accuracy of producing this kind of aircraft, and the production line needs to be deeply transformed to succeed. Moreover, the propeller blades of the turboprop engine used on the V-above are so long that this design can only be used in medium-sized aircraft, and cannot be used in small aircraft at all. ”