Of course, the size of the aircraft does not need to be as large as the Mi-1711; You must know that the empty weight of the Mi-1711 is 7,055 kilograms without refueling, and a small private airplane with an empty weight of 1,200 to 1,500 kilograms is sufficient.

Of course, there is no need for that meter-long warehouse, which is for Uttarene Schmidt; It really doesn't help. Removing the cargo compartment can not only reduce the size of the aircraft, but most importantly, reduce the weight of the aircraft and make the aircraft more flexible.

As long as there are four seats in the entire cockpit, it is enough for Uttarlenschmidt to take his friends or relatives with him to soar above the blue sky during the flight.

Uta Ryan Schmidt did not intend to use this aircraft as a transport aircraft, but as his own air aerobatic aircraft, so the lightweight of the aircraft is the most important thing. In order to continue to reduce the weight of the aircraft, the use of corresponding composite materials is indispensable to reduce the weight of the aircraft itself as much as possible.

As for the rotors, naturally there is no need for so many pieces, although the two rotors of the Robinson R44 helicopter look too cold, compared to the Mi-1711 with five rotors, the equipment rotors also seem to be a little too extravagant -- don't underestimate the five rotors, the price of the rotors is not cheap, all of them are made of high-performance composite materials, which are > the turboshaft engines and propellers used in helicoptersIt's one of the most expensive things on a helicopter! It's even much more expensive than some avionics - then if you do the math, three rotors will be enough.

Although the fire control system is not necessarily equipped, the necessary avionics equipment such as navigators, radio stations, electronic compasses, altimeters, horizons, corresponding weather radars and autopilot pilots are still essential.

If you do the math, this aircraft is at least much better than the small private helicopters in Europe and the United States that are still using piston engines, such as the Robinson R44, the world's largest selling small private jet! The volume and weight are about the same as the volume and weight of the Robinson R4, that is, a little more than a ton, but the power is not half a star! Naturally, the performance is not half a star.

Well, there shouldn't be any problems, right? The engine, the final reducer, the propeller hub and the rotary tilting plate, the transmission shaft, the medium reducer, the tail reducer, the tail rotor and the shock absorber can all use the original things of the Mi-1711, the only thing to worry about is the fuselage frame, which can not continue to use the Mi-1711 fuselage frame, and needs to be specially redesigned for this purpose, however, since the relevant research equipment and researchers have been in place, let Xiao Chenxi and Alice design a fuselage frame, and then make a fuselage frame. Shouldn't it be a problem, right?

It is estimated that there is no problem with such an airplane, and it is no problem to go directly to the aerobatic machine.

Hearing Zhang Lan finish talking to herself, Xiao Chenxi and Alice nodded: "That's right, it's just a matter of designing a suitable fuselage according to the existing materials, this thing is very simple, and it is really not difficult for us." ”

"What is the fastest speed of such an airplane?" Zhang Lan is a little curious, what kind of performance can such an aircraft achieve? "What about maneuverability?"

"It is not as heavy as the Mi-171, compared to the Mi-1711 empty weight of 7,055 kilograms, the helicopter you said just now I simulated and calculated, it is about 1,200 kilograms, but the power is as high as 190 horsepower, reaching half of the Mi-171 ground, so calculated," Xiao Chenxi said, "Regardless of other aspects such as protection, purely in terms of speed and maneuverability, it is stronger than the American Apache!" Well, it's a supercar in a helicopter, so to speak. ”

"Holy!" Hearing Xiao Chenxi's words, Zhang Lan couldn't help but burst out with a foul language, "Is it so exaggerated?" ”

The maximum allowable speed of the Apache helicopter gunship is only 365 kilometers per hour, and it cannot fly at this speed for more than 1 hour, otherwise the engine may overheat, and the usual cruising speed is only 293 kilometers per hour - although this speed has exceeded the maximum speed of many helicopters - and now Xiao Chenxi actually told himself that the speed of the plane he had just envisioned exceeded the speed of the Apache helicopter in active service in the United States! Really, ahem, it's a little unexpected.

"This is our more conservative estimate," Xiao Chenxi shrugged helplessly, "Who asked you to let us design the fuselage frame and appearance for you, if the performance of the engine is better, we can actually do more." ”

The point is choked: the 1900 shaft horsepower engine is used in only 1200 kg, and you still think that the performance of the engine is not good enough? The ratio of the power of the engine to the weight of the aircraft is more than 1.5:1, what else do you want? You must know that the total output power of the Mi-171 ~ two TV3-117VM turboshaft engines is only 1900X2 = 3800 axle horsepower, but it is necessary to drive the Mi-1711 multi-purpose helicopter gunship with an empty weight of 7,055 kg and a maximum load of 13,000 kg.

Xiao Chenxi said, she has projected the shape of the plane she designed to Zhang Lan, and what appeared in front of Zhang Lan's eyes was a helicopter with a smooth aerodynamic shape and three rotors, which made people want to drool at the sight of it: the appearance is that it adopts a retractable front three-point hydraulic landing gear, and the shock absorption effect is quite good when landing! Look inside, it's a super advanced glass-based cockpit that's been further improved on the glass-integrated display cockpit they developed, and can be driven by just one driver.

Compared with the glass-based cockpit designed by Valoga, the cockpit designed by Xiao Chenxi has canceled the original head-up display, and the number of displays for various other purposes has also been reduced from 5 to 3. Even so, it is enough.

It can be seen that such a design can ensure the flight performance and safety of the aircraft while minimizing the cost - although the cost of this aircraft is estimated to be quite high, who made this aircraft use a turboshaft engine - especially creatively, Xiao Chenxi also designed two wings on both sides of the fuselage of this helicopter, eh? Zhang Lan's eyes widened: Wings? ,

"What are these wings for?" Zhang Lan pointed to the two wings on both sides of the fuselage on the plane, which were not very long, and asked Xiao Chenxi.

There are not a few helicopters equipped with short wings, but they are basically military helicopters, such as Lao Maozi's Mi-"Hind" armed helicopter, well, it is the terrifying-looking armed helicopter of the former Soviet Union and Rambo driving a tank against each other in "First Blood 3", the American Apache armed helicopter is also equipped with short wings, and even the European "Tiger" armed helicopter that is now under development also adopts a short-wing design. But these short wings, without exception, are used as weapon pylons, and so-so can also provide a little extra lift for the aircraft. Zhang Lan was a little puzzled, why did Xiao Chenxi design the short wing for this aircraft?

"What's that?" Xiao Chenxi glanced at it, "That wing can provide additional lift for the aircraft when flying, compared to the helicopter without this wing, when it needs to reach the same speed, the power of our aircraft can be reduced by about 30% compared to them, and the fuel consumption is reduced accordingly." Thanks to this wing, our aircraft is capable of reaching a top speed of more than 380 kilometers per hour. It's not an exaggeration to call it the supercar of helicopters. ”

Xiao Chenxi also did not explain one thing: like supercars, the faster the supercar, the more expensive it is, and this aircraft also has a price worthy of its speed.

Zhang Lan nodded: Okay, this thing was originally just designed to improve the lift of the aircraft.

"And," the wings of the plane began to fold up from the root on the projection released by Xiao Chenxi, "when it is not needed or parked, this wing can be folded up, saving a lot of space." ”

"Okay, I want one of this plane too," Zhang Lan said, feeling a little depressed: I don't have such a good thing? It just doesn't make sense! "Plus, this aircraft will be the backbone of our company's small private jets in the future! In addition, a series can be formed, some models can be enlarged appropriately, many people do not need such a high maneuverability, they need to be able to load more people on it. "Well, the selling point Zhang Lan has already thought of: a private helicopter beyond Apache!

"It's just a pity," said here, Xiao Chenxi was a little regretful, "In fact, the theoretical speed of this helicopter can exceed 500 kilometers or more, but due to the lack of congenital conditions of the rotorcraft, the maximum speed can only reach 385 kilometers per hour under ideal weather conditions." ”

Zhang Lan knows this, limited by the congenital insufficiency of rotor conditions, the rotor cannot turn very fast, so the speed of the rotorcraft cannot fly very fast, generally speaking, it will not exceed 30 kilometers per hour, watching the helicopter fly when the movement is very large, but in fact, the speed of the rotor is rarely more than 300 rpm, such as the straight nine helicopter simply by increasing the rotor speed to force the aircraft to speed up, in fact, the world is not very agreeable, because that damage to the engine is great. Rao is like this, and the rotor speed of the straight nine is only 350 revolutions per minute.