A prototype of a high-speed Sikorsky S-97 Raider helicopter is shown.

October 2 company Sikorsky Aircraft held a presentation of its new development. The public was shown the first prototype of a promising high-speed helicopter S-97 Raider. This machine is created on the basis of the latest experimental projects and is intended to replace the existing equipment in the troops. The Sikorsky S-97 Raider machine belongs to the not too numerous class of high-speed helicopters created by various companies in recent years. In the future, S-97 helicopters are planned to be delivered to the troops.

The high-speed S-97 helicopter is being developed based on the experience gained by Sikorsky specialists during the X2 project. The main objective of the new project is to create a helicopter capable of flying at a speed of at least 350-400 km / h. Due to some features of the aerodynamics of blades, modern helicopters cannot fly at such speeds. The S-97 project is designed to solve this problem, as well as to give the armed forces of the United States and other countries helicopters with high performance.

It should be noted that the Sikorsky S-97 Raider, for some reasons, does not fully comply with the definition of “helicopter”. A similar technique, created recently, is denoted by the terms "high-speed helicopter" and "rotorcraft". However, a new class aviation technology is only just being formed, which is why the generally accepted term for its designation has not yet been defined. In the materials of the Sikorsky company, the new development is called a helicopter. So we will call her.

The S-97 project is the first development of the Sikorsky company in this area, created with consideration of real use. New high-speed helicopters are supposed to be offered to the US military, where they will be able to replace reconnaissance helicopters OH-58 Kiowa Warrior. The new equipment will be able to carry out reconnaissance flights, deliver soldiers to specified areas, as well as support ground units with fire. Thus, the company Sikorsky actually created a new multifunctional military helicopter.

The first combat helicopter of the new scheme turned out to be relatively small and light. The total length of the machine does not exceed 11 m, the maximum span of the planes (stabilizer) is equal to 4,87 m, and the diameter of the coaxial bearing screws is 10,4 m. The declared take-off weight of the machine does not exceed 5 tons. It is alleged that with such dimensions and weight the helicopter S-97 Raider will be able to perform a wide range of different tasks.

The new helicopter has a streamlined fuselage. In the nose of the fuselage is a double cabin with the location of the two pilots side by side. The cabin is equipped with two side doors for landing pilots. A cargo / passenger cabin is provided in the middle part of the fuselage. According to the developers, the helicopter will be able to carry up to six paratroopers or an equivalent amount of cargo, for example, a stock of fuel and weapons.

Above the cabin is a turboshaft engine and a main gearbox. The latter distributes the engine power to the coaxial rotors and the pusher tail propeller. The tail screw is one of the main features of the project, affecting the entire technical appearance of the machine. It is the tail rotor that should provide high flight speed.

To accommodate weapons in the middle part of the fuselage there is a small wing with two arms suspension points. To control the flight at high speeds in the tail of the machine there is a stabilizer with a rudder with keels at the ends, as well as an extra ventral carina. The latter accommodates the tail wheel of the landing gear, retractable in flight. The main landing gear located in the nose of the fuselage behind the cockpit and are removed in flight.

The Sikorsky S-97 Raider helicopter is equipped with coaxial rotors of the original design. The main problem preventing helicopters from developing high speeds is the specific flow around the blades. Upon reaching a certain flight speed, the speed of movement of the tip of the blade relative to the air flow exceeds the speed of sound, which leads to disruption of the flow and loss of lift. The principles of helicopter flight are such that this phenomenon cannot be completely excluded, but it is possible to “transfer” its onset to higher speeds. For this, various methods and technologies can be applied.

Engineers of the Sikorsky company, after analyzing the data collected during the tests of the experimental helicopter X2, developed a list of know-how used in the S-97 project. To optimize the aerodynamics of rotors at high speeds, it was decided to increase the rigidity of the blades, as well as equip them with arrow-shaped tips, designed to work at higher speeds in comparison with the main part of the blade. Due to this, two four-bladed rotors can work effectively at relatively high speeds.

The need to improve the aerodynamics of the entire helicopter forced the designers to use the rotor hub curlers. The mechanisms of the skew automatons of both screws are closed with fairings of a characteristic complex shape. Between them placed additional fairing, in the form of a drop shape.

Takeoff and landing, as well as flight with low and medium speeds should be provided with rotors. All these stages of the flight are proposed to perform "in a helicopter". During the transition to high-speed flight, the task of ensuring the translational motion is completely assigned to the pushing screw located in the tail section. Used six-bladed propeller with variable pitch blades. Probably, when flying at speeds of more than 250-300 km / h, the lifting force should be provided not only with rotors, but also with planes: a developed stabilizer and a small wing. Control in high-speed flight is provided by the rudder on the stabilizer and the rudders on the keels.

On the two pylons of the S-97 helicopter, AGM-114 Hellfire guided missiles, blocks of unguided missiles and machine gun containers can be suspended. Such a combat load will provide a sufficiently high flexibility of the use of a helicopter to support ground units. Thus, the helicopter can perform not only transport or reconnaissance missions, but also some shock ones.

The know-how used is said to provide fairly high flight characteristics. When using the tail pusher propeller, the S-97 Raider can fly at speeds up to 220 knots (around 407 km / h). Flight range exceeds 600 km, the maximum flight duration - more than 160 minutes. In the future, a significant increase in flight range is possible due to the installation of outboard fuel tanks or an in-flight refueling system.

Sikorsky S-97 Raider high-speed helicopter was repeatedly demonstrated at various exhibitions in the form of a model. October 2 public for the first time showed a prototype machine to be used in the tests. The first flight of the helicopter with the tail number N971SK will take place in December of this year. In the foreseeable future, the construction of the second prototype will be completed, which will also participate in flight tests.

The company Sikorsky Aircraft has high hopes for a new project. Moreover, S-97 Raider is called the new generation of combat helicopters. For four years, the company, having joined forces with several related organizations, has created the world's first high-speed helicopter, which, after passing tests and fine-tuning, can be put into operation by the armed forces. The leadership of the aircraft company considers this a reason for pride and hopes for the successful completion of the project.

Indeed, the project S-97 Raider, at least, is of great interest. The designers of the Sikorsky company managed not only to develop several pilot projects, but also to use the knowledge gained in the development of equipment designed for real use. Recall that since the late sixties, American aircraft manufacturers are engaged in the issue of high-speed helicopters with coaxial rotors and an additional pushing / pulling propeller.

Back in the mid-seventies, Sikorsky built two prototypes of the S-69 aircraft, equipped with coaxial rotors and two turbojet engines. During the tests, the car developed speeds above 515 km / h. However, the experimental aircraft had several serious flaws, which caused the project to be stopped after testing the prototypes.

The Sikorsky firm achieved the greatest success in the field of high-speed helicopters at the end of the last decade. In August 2008, the first flight of an experimental helicopter X2, built according to the same scheme as the proposed army S-97. Using coaxial rotors and a pusher propeller, rotated by a single turboshaft engine, this helicopter could accelerate to 460 km / h. Tests of the Sikorsky X2 helicopter continued until the 2011 year, after which the project was closed, and all the company's forces were thrown to develop a new high-speed helicopter.

The project of high-speed helicopter Sikorsky S-97 Raider out of the design stage and is preparing to start testing. The first flight of the prototype of the new model should take place before the end of this year. Tests and fine-tuning of the helicopter will take some time, after which the US military will be offered a new model of aircraft. The exact future of the car may still be the subject of controversy. However, due to the small number of new technology projects, the S-97 Raider project has already entered history world aviation.


On the materials of the sites:
http://sikorsky.com/
http://i-mash.ru/
http://janes.com/
http://defenseworld.net/

Comments

[Tyumen]

Probably a good bird will be. I envy. But by brutality, I think * Crocodile * can not catch up.)
Afghans still remember the ascent from behind the mountains of Soviet turntables. With horror.)

[Juborg]

So far, I think this is only a box with implantable thoughts. The most important thing that is missing is a powerful, and most importantly lightweight engine for such dimensions. Here is a complete dead end. Perhaps you need an engine with other physical principles ?!

[gridasov]

Everyone knows that a screw or any turbine has a rotation limit when the application of engine power is not able to untwist the screw further. The reasons are justified. Therefore, it is not so much physical principles as new algorithms for organizing hydrodynamic flow on the surfaces of the outflow.

[b0bi]

Here the biggest problem is the rotor. At high speed, the main rotor develops supersonic speeds in the oncoming flow. The problem of stability and indestructibility of the screw is trying to solve the years from the 60s and Western designers and Soviet. So far, no particular success in this. There were projects with a folding screw, but it's all futuristic. Ours also work in this direction http://vpk.name/news/89575_rossiiskii_skorostnoi_vertolet_smozhet_razvivat_skoro

st_svyishe_800_kilometrov_v_chas.html

[gridasov]

Not the whole screw, but only its peripheral part. The theoretical part of the problem is solved. Now it’s important who cares more.

[philippas]

Ches a word, I looked at this device ... melancholy took me. I think: Why is it better than VTOL? So his prospects seem sad to me ..

[Argon]

You don’t know the question, you were too lazy to read the article, why clog up the commentary field? power, and in the next efficiency, and all this with the condition of maintaining an acceptable resource. The main problem was the organization of the flow around the main rotor at speeds above 350 km / h, provided that normal controllability is maintained. Obviously, SA engineers solved this problem, practically solved it first And now we are witnessing the second fundamental breakthrough in the development of vehicles with rotating bearing surfaces, the first was in the transition from gyroplanes to helicopters. In my opinion, it is quite natural that his company made the first production helicopter in the world. Increasing the speed of helicopters is extremely important. task because is at the present stage, practically the only possibility of hitting the "Aheles heel" of all helicopters is a relatively low transport efficiency.

[gridasov]

All the time you have to deal with academic specialists who see only part of the question and do not want to see reality. I do not claim your place in life. I'm talking about reality. Once again, and personally for you, I repeat that the algorithms for organizing the hydro-gas-dynamic flow on the surface of the expiration of the device of its transforming, that is, the screw and all types of turbines, as its derivative, are considered as a complex mathematical process, analysis of algorithmically related physical processes. Therefore, there are no such modern methods of mathematical analysis that would allow this analysis to be carried out simultaneously at each point in the topological space and in the dynamics of transformations of this each point, as energetically interconnected in the whole complex of relations. The wing theory is designed for low potential hydrodynamic processes. Wanting to meet the requirements of the time, technical problems must also be solved at a high potential level and analysis and solutions. It follows from the foregoing that the conditions for ensuring a safe and efficient flight of any aircraft should be based on the organization of control of this flight of both efficiently organized algorithms of the transformation process and in the environment of flows flowing over the surfaces of the outflow, and their control devices. Therefore, I repeat once again that it is clear that SA engineers did not solve the problems. And do not dissemble yourself. Because, above all, the laws of proportional dependence and engine power and flight time and flight weight and number are visible in everything. fuel. Just please do not fool yourself.

[Evgeny_Lev]

So maybe they are not going to give the rotors rotational motion at all. Maybe they will only use them for take-off / landing?

At the moment when the machine moves from vertical to horizontal translational movement, the screws will lock in the X position and will serve as simple wings.

[gridasov]

Then, on some vectors of motion of air flows on the blades, there will be effects that will significantly reduce flight efficiency. And then the air is not water, any critical moments must be guaranteed to pass, and the locking of the blades is also associated with the fact that they then bring to the operating mode ..

[Evgeny_Lev]

Well, you can spin using jet nozzles at the ends of the blades.

You can use the system of exhaust gases from the main turbine. Hollow blades with nozzles at the ends.

[svyach74]

This will not work, for the function of the wings, the helicopter blades have insufficient area. They will only create unnecessary resistance, the function of the "wing" of the helicopter is created, as, once, due to the speed of rotation of the blades, and the formation, as it were, of a single surface. Have you ever done a googl-mogul? For this, the mixer must be turned on.

[Argon]

Dear gridasov, if you become a victim of spice, you don’t need to show it to others, because it’s not your trouble, but punishment.

[gridasov]

If this is for me, then I apologize. I wanted the best. I apologize and be healthy.

[ramsi]

But it is interesting if the angle of rotation of the blades is variable, i.e. on the sides - close to zero, there will be a decrease in the efficiency of the propeller, but in the most problematic areas, but should the efficiency of the wing formed by them increase? ..

[gridasov]

Such blunt-eyed people would at least be silent. There is a theoretical justification, calculations, a finished sample of a working device. Am I supposed to not believe my eyes ?. The rams will crush the water in the mortar.

[Vasek]

Quote: Argon

In my opinion, it is quite logical what his company did when it created the world's first production helicopter.

Oh, what a guy they missed in due time!
But even before the revolution, Sikorsky began to show decent results and it was amazing how the Bolsheviks did not see its potential.

[Bugor]

Exactly! The scene from "Rambo" immediately comes to mind.
Impressive ... :) :)

[svyach74]

This is when it was! Krok, of course, is beautiful, but you still remember IL-2!

[dzau]

Wunderwaffle will cost as a Comanche with a raptor combined?

[Dmitry 2246]

And also "eat" three screws. The technique is impressive, but the feasibility is questionable. And of course our "crocodiles" are worse.

[Lopatov]

Quote: Dmitry 2246

and expediency is in question

Speed. Hybrids of such a scheme overcome the maximum speed limits inherent in conventional helicopters.

[dzau]

Quote: Spade

Speed. Hybrids of such a scheme overcome the maximum speed limits inherent in conventional helicopters.

There, the matter seems to be in the design (possibly even the operating mode) of the blades, and not the pushing circuit.

And it all looks like a crutch: the stall at the ends of the blades has not disappeared.

Even convertiplanes with their complexity in the future cause more optimism.

[Lopatov]

Quote: dzau

There, the matter seems to be in the design (possibly even the operating mode) of the blades

The thing is that the blade, the tip of which moves at supersonic sound, and the part that is closer to the axis of rotation at subsonic speed, tends to collapse.

A gyroplane with a pulling or pushing propeller is devoid of this restriction: the higher the speed, the fewer rotations of the rotor are necessary to create lift. That is, the blades rotate all the time at subsonic speed.

And these hybrids combine the advantages of both cars. That is, at low speeds, this is a full-fledged helicopter with all the consequences, at high speeds, an autogyro.

Even convertiplanes with their complexity in the future cause more optimism.

Rather, the opposite. Hybrids are a more promising thing. And having more room for improvement. In my opinion, the Kamovites have a project which, when some high speeds are reached, the blades add up at all, and small wings create lift.

[gridasov]

Remember the Casimir effect. In the flow of a moving medium, the object begins to rotate. According to Poincare, this is even easier. The increasing difference el. magnetic potential at the ends of the topological space, which can be considered a propeller blade. And with a speed difference at its ends, EMF is inevitable, then there are forces of dynamic rotation, that is, backs. So at maximum speeds, the screw is destroyed not only along the plane of the wing profile itself. And it is known where, but also in the zone of the longitudinal vector of flow outflow to the rotor blades. Therefore, this problem with such an organization of the whole complex of the process of rotation of the screws, the problem cannot be solved. The way to strengthen the screw material is the road to nowhere. Is that in the development of materials science.

[Lopatov]

Quote: gridasov

Therefore, this problem with such an organization of the whole complex of the process of rotation of the screws, the problem cannot be solved

Why? This scheme overcomes the "helicopter" speed barrier

[gridasov]

Read carefully again. I have not yet described the whole complex of problems. With supersonic sound at the ends of the blades, thermionic emission of the screw material begins. And no matter what material the blade consists of. Therefore, you will overcome the barrier, but there will be no normal and safe operation. And in general, I would not argue if I did not know the solution to the problem.

[Lopatov]

There is no supersonic, dear. That's the whole ficus picus: the higher the speed of the hybrid, the lower the rotational speed of the rotor. It is subsonic all the time.

[gridasov]

If the conversation is about the screw itself, then you are wrong. The speed at each section of the blade of their radius of rotation will vary algorithmically. And the edges can rotate at the speed of a certain difference el. magnetic potential. And these parameters will not depend on the speed of the helicopter itself. Therefore, less rotation speed, less performance. It should be borne in mind that with vertical air flows, and especially the so-called. turbulent flows, when the jet is an anti-directional vector and others, then the overload of the blades is even higher.
We conducted experiments and the systemic structure of flows in turbulence determines the energy potential of the flow not at all from the arithmetic progression of the change. So, the dependencies are slightly different.

[Lopatov]

Quote: gridasov

The speed at each section of the blade of their radius of rotation will vary algorithmically.

The speed of the tip of the blade (that part of the blade that is farthest from the axis of rotation and has the highest speed) will also be subsonic.

[gridasov]

Of course, that it will be in the modes of acceleration or reduction of the subsonic rotation speed. And I also emphasize that the potential difference at different radii will always change, from the complex of acting flows along all possible vectors and the very position of the aircraft in space. BUT we do not need speed itself but the performance of the propellers, as a set of air flows for a rational flight. Therefore, overcoming the thresholds of destruction, as a limit of rotation speed, we increase productivity. It is necessary to remove many proportional dependencies and translate them into new interconnection algorithms. What am I talking about.

[cosmos111]

Quote: Spade

Why? This scheme overcomes the "helicopter" speed barrier

and can be used for the production of UAVs "drones" ...

in the 50s / 60s in the U.S. Navy, used a QH-50 DASH UAV was used to deliver torpedoes ...

[gridasov]

All right! The helicopter barrier for past requirements is being met. BUT! New tasks in this scheme cannot be solved. Especially in the field of increasing competition for a place in the world elite. If Russia wants to be in its place, then the tasks must be solved not only current, but at all levels of prospects

[cosmos111]

The "Rotodyne" developed in the mid-1950s by the British firm Fairy Aviation Company ... was even launched into small-scale production ...
in January 1959, on a closed 100-km route, they received an average speed of 307,2 km / h ...
here in detail:http://www.airwar.ru/enc/uh/rotodyne.html

[dzau]

and what is the fundamental difference between the system of turning the blades into the pushing mode and their folding in the project with a separate pushing screw if both wings have it?

[Lopatov]

At speeds when it will be necessary to fold the rotor, the tiltrotopes will never fly.

[gridasov]

In general, is there at least some scientific justification for this or that proposal?
Once again, I note that in such a plane of motion of the blade, there will always be a plot of polarization on the plane. This will lead to its destruction at high speeds. And these areas are known. Remember the same areas of destruction from cavitation during hydrodynamic outflow. In the air the same thing, but at different speeds.

[Lopatov]

Presumably, there is, if the Sikorsky company is already creating the third flying device.

[dzau]

did not quite understand you; the transformation of "main" propellers into "pushing" propellers at the tiltrotor is essentially the same - the same "folding" of the blades

Simply put, the tiltrotor is more suitable for the role of a "hybrid" (only a hybrid of a helicopter and an airplane, not a helicopter and an autogyro) than the presented wunderwaffle

and, unlike her, in the future has the opportunity to get rid of speed limits, as well as from childhood diseases like an unreliable design and difficulty in management (for example, ospri)

the use of constant bearing blades (without "folding") in the autorotation mode - it looks too much like a crutch, and only up to a certain limit solves the problem with speed limitation

I am, of course, not an expert, but an autogyro at "airplane" speeds - to what extent is it expedient, economical, controllable?

[Lopatov]

Quote: dzau

did not quite understand you; the transformation of "main" propellers into "pushing" propellers at the tiltrotor is essentially the same - the same "folding" of the blades

And who is talking about pushing screws? Kamovskiy Ka-90 concept provides a thrust jet engine.

Quote: dzau

and, unlike her, has the prospect of getting rid of speed limits,

Immediately upon encountering restrictions, new ones associated with the large size of the pulling screws

Quote: dzau

as well as from childhood diseases like an unreliable design and difficulty in managing (for example, ospri)

A tiltrotor will never be as safe as a hybrid, which is capable of landing in autorotation if the engine fails.

Quote: dzau

the use of constant bearing blades (without "folding") in the autorotation mode - too much like a crutch,

And not a gyroplane? And at a new level, with a variable pitch of the screw.

Quote: dzau

I am, of course, not an expert, but an autogyro at "airplane" speeds - to what extent is it expedient, economical, controllable?

It is more expedient than a traditional helicopter. It takes from it all the "pluses" in the form of vertical takeoff and landing, the ability to be based on small sites, emergency landing on autorotation, relatively small dimensions. And at the same time it has the ability to overcome the "helicopter" speed limit.

[dzau]

I will not argue.

[Vasek]

Quote: dzau

Simply put, the tiltrotor is more suitable for the role of a "hybrid" (only a hybrid of a helicopter and an airplane, not a helicopter and an autogyro) than the presented wunderwaffle

In general, no matter how comic it may sound, the future belongs to "transformers". At a certain high-speed stage, the transformation of a helicopter into an airplane cannot be avoided.
It’s just that today's technologies didn’t allow us to go beyond konvertoplans in transformation (and how much they had to be dropped before they were taught how to fly a little).
And tomorrow or the day after tomorrow - go know, maybe both the wing and the blade can be extended / folded? And what else can a revolution in materials offer?
But without attempts and research, the problems cannot be solved, and Sikorsky is great in this. I would like to believe that our people do not sit idly by.

[cosmos111]

Quote: Spade

Rather, the opposite. Hybrids are a more promising thing.

I agree ... convertiplanes dead end link ...
The topic of hybrids was actively developed in the 70s, but did not receive development ...

Sikorsky XH-59A ABC 70swith 2 turboprop engines ... a speed of over 300 mph ...

[svyach74]

Yes, because the tiltrotor is also a hybrid, and an autogyro that appeared much earlier! All these are attempts to combine the capabilities of an airplane and a helicopter, without loss in quality, and this will never happen, because, as one of our interlocutors mentioned, no one has canceled the laws of physics. Although, of course, there is no limit to perfection. Perhaps it will be more realistic when an alternative fuel appears, because all these schemes "eat" a lot of fuel!

[Juborg]

You are right dear Lopatov, the power of the engines is even excessive, the engine torque is even extinguished, more than twice otherwise, the destruction of the blades and other troubles. I DON'T TECHNIAR, BUT EVERYTHING STUDYED PHYSICS AND ON THE EARTH ITS LAWS UNTIL CANCELED.

[gridasov]

There are no laws of constant processes. All laws must determine the algorithmic laws of transformations of these processes. Therefore, what is in the near-earth space is not quite what it is at different heights.

[bigELDAK]

Maybe even more so as it seems he will act in tandem with a "Comanche-like" rider

[cosmos111]

refueling is also provided for the S-97 Raider hybrids ...
refueling in flight at speeds and altitudes is much higher than those commonly used for helicopters ....

[avt]

Quote: Tyumen

Probably a good bird will be. I envy.

When it is, then we'll see, but for now it's not even a bird, so far the chicken is in the nest, and the testicle is at 3,14 ... e. "Kamov" has long been engaged in such things without any pomp and exhibits models at exhibitions, and Mikheev voiced in an interview, though not on such a scale and without such pomp a la the presentation of drones in "Iron Man 2". "Sikorsky" current I made an experimental sample, but it stinks! And "Kamov", for a second, makes more than one production car according to this scheme.

[Lopatov]

Quote: avt

,, Sikorsky "current of the experimental sample made

Their prototype flew 6 years ago, what are the "current-current"?

Quote: avt

And "Kamov", for a second, makes more than one production car according to this scheme.

They also did not make a single car of this scheme, they are limited to models.

[Eggor]

Quote: Spade

Their prototype flew 6 years ago, what are the "current-current"?

Before that there was also such a helicopter:

[avt]

Quote: Spade

They also did not make a single car of this scheme, they are limited to models.

What is the first answer gone? Well, I repeat. Firstly, "Sikorsky" did not do it in series according to the coaxial scheme, in contrast to "Kamov" which only now wants to deliver the classic Ka-60. Secondly, there is a real problem in terms of cost - efficiency that no one has yet decided - the "hard" screw. with a hard screw? If not, all this is an ordinary advertising razvodilovo, as well as a presentation of a full-size layout. So if you climb up to the layout designers from Kamov, you will definitely find everything the same, but without beautiful video clips, without PRastia. But every cloud has a silver lining - perhaps, having seen enough boast overseas, the Ministry of Defense will give money to Mikheev for new cars. So, in the end - the Diva of the wondrous and wonderful miracle of the Pendostanians is not observed, and there is no less work there than with Osprey.

[Eggor]

Quote: avt

Firstly, "Sikorsky" did not make a series of coaxial

I agree, but not quite, in the 60's there was a series of almost four hundred drones Gyrodyne QH-50 DASH.

[Lopatov]

To be absolutely precise, the world's first coaxial helicopter is a Stanley Hiller helicopter

[Lopatov]

The Sikorsky firm began its experiments in this area in 1972. Their S-69 with two pushing turbojet engines in 1974 accelerated to 488 km / h

That is, for Sikorsky, this S-97 will become the third vehicle of this scheme, and work has been going on for a very long time.

So personally, I would not talk about "beautiful commercials" There is real work here.

[Tyumen]

All the same, it’s nice when such articles are held at VO. Now it’s a rarity here. When you can read the comments of specialists and amateurs interested in a particular type of technology. You will learn a lot. Thanks to everyone who wrote something. And then I'm sick of reading poster slogans.

[Jet]

Well, once a month, for a change, you can write about the technique, in order to somehow justify the name of the resource. Not only that, about the American one too! Almost sabotage, damn it .. And more often it is impossible, in the "fifth column" will be written down. Like you, by the way, for such comments;)

[Tyumen]

Quote: Jet

Like you, by the way, for similar comments;)

Let them write anywhere. I’ve been here for four years, almost from the foundation. Ura-talkers are violet. It's a pity, until you get a competent comment, you go through so much rubbish like a giant or a mihan that you already forget what you wanted.

[Jet]

So most of the old readers have not come to this site for a long time, from which it simply breathes with hatred. And what is typical, most of the likes and approving comments collect absolutely "brilliant" articles such as "Liquid chair of fascism" or "Itself will fall apart", dedicated to pouring faeces on neighbors and "partners". I hope these are trends of this resource only, and not of society as a whole ..

[iwind]

Quote: Jet

So most of the old readers have not come to this site for a long time, from which it simply breathes with hatred. And what is typical, most of the likes and approving comments collect absolutely "brilliant" articles like "Liquid chair of fascism"

Quote: Tyumen

Let them write anywhere. I’ve been here for four years, almost from the foundation. Ura-talkers are violet. It's a pity, until you get a competent comment, you go through so much rubbish like a giant or a mihan that you already forget what you wanted.

In the same topic, a good picture was hanged in LiveJournal. Which characterize the situation very well.
I'm still curious how people have enough time to type a few thousand comments in a couple of months, half a year

[Alexander]

350km \ h is a high-speed helicopter? Yes, the Mi-24 accelerates to 320, but they didn’t hear about Lynx (400 km / h))

[Lopatov]

Quote: alexandr

and about Lynx (400km \ h) they didn’t hear at all)

There is one. But this is a record helicopter. Its rotor blades cost about the same as the machine itself. Because the serial Link has a maximum of 260 km / h

Quote: alexandr

Yes Mi-24 accelerates to 320

?

[svyach74]

So s-97 is also ostentatious, there are cars that developed higher speeds, but this does not mean that it will all go into series, besides, it’s not only speed, there are a lot of factors!

[Tyumen]

In my opinion, does the 300-320 Black Shark have a maximum?

[Omega2014]

It is good that Sikorsky, at one time, managed to leave the rash ....

[Lopatov]

His father, a Russian nationalist, was killed in Ukraine. So he left.

[Master_Lviv]

I hope you left too? If you are not its resident - I ask you - never come there! And so there is enough hitting scumbag.

[avt]

Quote: Omega2014

It is good that Sikorsky, at one time, managed to leave the rashka ...

And his descendants never returned to their homeland of Kiev in present-day Ukraine, and so they would have galloped without any helicopters Sala Dropped! Heroiam Shroud! PS Now, to the evil of Russia, you will finish off “Antonov” as a legacy of the imperial past and finally there will be Svidomo happiness.

[Master_Lviv]

The rocket is still faster.

[bigELDAK]

By the way, here are the Chinese, too, something is fussing so far: http://vpk.name/news/96525_v_2014_godu_v_kitae_sovershit_svoi_pervyii_polet_unik

alnyii_vertolet_k800.html # prettyPhoto

[Tyumen]

And it will become from them, and will be overtaken by performance characteristics.

[gridasov]

Everything suggests that engineering is at its limit. Everything again looks like a torn blanket. You achieve some positive results, others aggravate. Especially obvious are the general lack of progressive ideas in the field of organizing dynamic air flows. And these are the key questions. The screws have critical flaws that cannot be fixed.

[Evgeny_Lev]

Well, of course, there is a limit to the possibility of using air to move around it. It is obvious.

Quality, I think, will be a jump when the air remains only a substance, the resistance of which will need to be overcome and which will be used for flights, will no longer be necessary.

[gridasov]

Can anyone explain to me what kind of scientists they are creating propellers and helicopters, knowing that the blades are going on electric. magnetic processes, and they solve the problem of banal physical strengthening of the structure of the material.

[Tyumen]

And this, brother, MILITARY SECRET.)

[gridasov]

Yes, but now it’s obvious that it is the rascians who can appear as the titular nation that will really save humanity from obscurantism. I not only ascertain the facts of a person falling into the abyss of lack of spirituality, cruelty, but also investigate the reasons for this. Information, flows of uncontrolled information like a virus infect the weakest and they turn into creatures in the guise of a person. Therefore, the law of the balance of forces always aligns one with the other. Against the background of mediocrity, geniuses are also born. They only need to be seen and accepted.

[voyaka uh]

I think so too. Push engine
must be reactive. So that without any tension
get by plane to the speed of sound.
And it’s wise to fold the helicopter rotor,
retractable fuselage on horizontal
flight. When you need to hang, the jet nozzle -
down for a short time - then a helicopter opens
rotor, spin and hang (or land vertically)
also without tension, calmly.

[Evgeny_Lev]

The thickness of the skew fairing, in the figure and photo are different. It seems to me that the issue has not been resolved.

pysy. Oh))) norms, I lose Major General)) there is a reason

[avt]

Quote: Evgeny_Lev

The thickness of the skew fairing, in the figure and photo are different. It seems to me that the issue has not been resolved.

And maybe they won’t decide, as one of the options for such a scheme - the screws are a kind of rotating wing without a swash plate, plus a pushing or pulling mover. But here the questions are higher than the roof, and most of all the stiff ones have a relatively cheap, technologically advanced blade, by design she will conduct herself in aerodynamics.

[Evgeny_Lev]

Those. "bearing" screws, both bearing and not?

I mean that they are used only in the "Takeoff / Landing" mode, at the moment when a linear linear motion is needed, the propellers are locked in some X position and act as simple wings? The pushing screw remains as such.

Xm. What then will serve as a flap and all sorts of ailerons *? Half wings, ala, like on a Crocodile?

[avt]

Quote: Evgeny_Lev

I mean that they are used only in the "Takeoff / Landing" mode, at the moment when a linear linear motion is needed, the propellers are locked in some X position and act as simple wings? The pushing screw remains as such.

We considered the option of changing the sweep depending on the speed of movement, moreover, for the classical scheme, both a two-blade propeller and four.

Quote: Evgeny_Lev

Xm. What then will serve as a flap and all sorts of ailerons *?

I didn’t dig the topic so deeply, but I know that mock-ups blew in the pipe. Generally I agree with

Quote: gridasov

Everything suggests that engineering is at its limit.

Moreover, both on the principles of a propulsion device, and with engines and their energy. Like after the Patriotic War, when the propeller was already at its limit, and the jet power had not yet gained power, this is especially noticeable in spacecraft on chemical rockets - the so-called "Deep Space", but simply on today's technology you just can't go to a manned planetary flight. Not the exploration of outer space, but mockery of the experimental astronauts, or rather voluntary punishment by imprisonment in inhuman conditions.

[gridasov]

Distributed flows from the turbine play the role of flaps and ailerons. One and the same turbine can distribute flows both along the thrust vector and in the directly opposite direction of motion as a brake or reverse. Everything is very simple if the turbine operates as "cold". And this is not difficult at all. Both theoretically and practically. I'll be clear. The biggest problem is in people who have a sober, analytical and non-dogmatic mind.

[saturn.mmm]

Quote: gridasov

The role of flaps and ailerons is played by distributed flows from the turbine

Everything suggests that Sikorsky created a coaxial device with the addition of a horizontal mover, which with relative efficiency preservation gives a speed increase of about 50 km. Because systems like Osprey have serious problems?

[gridasov]

The main idea in my posts is not the opposition of our discoveries to all modern helicopters, or rather the principles on which they fly, but the fact that we share low-potential and justifiably ineffective principles, those that correspond to already promising applications from the military and others. It is based on physical laws and physical algorithms. processes. Then someone said that SA made a breakthrough, but this is for simpletons. Yes, it was done qualitatively and beautifully, but the basis remained unchanged. Therefore, breakthrough technologies can not be done on the modernization of the old. And then you cannot create new models of technology without affecting changes in the scientific approach and in the depth of analysis. Everything is interconnected.

[saturn.mmm]

Quote: gridasov

The main idea in my posts is not the opposition of our discoveries to all modern helicopters

If this applies to me, then I haven’t even hinted about the confrontation.
This Sikorsky helicopter, possibly due to some slippage in the design of the convertiplane. A tiltrotor, in my opinion, is a more promising machine.
Although from a scientific point of view there is nothing new in aerodynamics.

[lexx2038]

For a long time, the Americans could not assemble the helicopter according to the coaxial scheme, during our unlimited restructuring, documents were taken out, what can I say, they were taken out by carriages, a whole military-technical department was created to digest Soviet developments, they are still working on their own. It's a shame.

[Evgeny_Lev]

judging by the width of the fairing of the swash plate, they still, normally could not create a mechanism.

[lilian]

Is all this fuss worth its result. 50-100 km / h faster than Ka-52. But what does it give? I have not heard anything about air battles between helicopters. To bring the landing to a place somewhat faster in my opinion is not particularly in demand. It’s impossible to get away from the fighter anyway; at higher speeds, the helicopter becomes more vulnerable to missiles.
And for work on the ground, he most likely will not be good, since for the sake of speed they probably sacrificed armor.

[max702]

Quote: lilian

Is all this fuss worth its result. 50-100 km / h faster than Ka-52. But what does it give?

I agree with you until there are real results of 700-800 h / km and a range of 1000 km it will all be unprofitable toys .. but as soon as the turntable can move 3-5 tons of cargo to a distance of 1000 km per hour and a half, then yes it will appear .. So far this only concepts.

[52]

I have not heard anything about air battles between helicopters. - Look for the combat use of the Mi-24 and Cobra in the Iran-Iraqi wars, and you will be happy!

[Solaris]

"the maximum flight duration is more than 160 minutes"
and one engine ...
beautiful bullshit

[theadenter]

Judging by the form, he’ll probably also swim under water

In general, I respect Sikorsky, they do good things.

[rubin6286]

It seems to me that the “highlight” of this machine is not much speed compared to already existing models of rotorcraft, but something else, for example, the implementation of the principle of controlling a rotor engine group in different flight modes, a kind of synchronization of the actions of the pilot and ACS. Coaxial helicopters do not have significant advantages over traditional helicopters and are more capricious in operation. They have a more complex and “brittle" gearbox, a higher level of vibration in the cab, such machines are sensitive to a sharp change in direction and maneuver when attacking ground targets. In the American car, a pushing screw, a two-fin tail with a stabilizer and rudders, and an additional ventral keel with a retractable tail wheel are added to the coaxial pulling screws. All this complicates the design and reduces its reliability. The Kiowa is an undeniably good helicopter, and the S-97 going to replace it will be another technical experiment. In modern warfare, a helicopter over the battlefield is very vulnerable and an increase in speed of 150-200 km / h is not significant.

[Simonov]

Handsome !! gorgeous contours!
Impressive speed and range at a single gas station.
Yes, it’s rather a flying laboratory, and therefore, the carrying capacity of about a ton and on pylons is not rich with weapons. It seems - this is the founder of the future family of specialized machines.

[saturn.mmm]

Quote: Simonov

Handsome !! gorgeous contours!

What feathers! what a sock!
And, true, the angel must have a voice!
Sing, light, do not be ashamed!
What if sister
With such beauty you’re a craftswoman,
After all, you would have had a bird king! "

[saag]

And what will these 350-400 km / h give?

[goose]

Quote: Spade

Why? This scheme overcomes the "helicopter" speed barrier

This speed developed 50 years ago quite serial and classic AH-56. Where is the breakthrough?
Oh sorry, this is a non-kosher Lockheed! Then he could not overtake Sikorsky, because Sikorsky most of all makes kickbacks for helicopters.

[Lopatov]

Quote: goose

This speed developed 50 years ago quite serial and classic AH-56

It is never serial and never classic. Take a closer look at his images. It also, like the Sikorsky hybrids, has a pusher propeller.

Well, about the "lockheed", which does not give kickbacks ... Laughing. Their practice of giving bribes led to serious government crises in Japan and Germany. In the latter case, 116 pilots were lost.

[goose]

Quote: Spade

Ibrids "Sikorsky" has a pushing screw

It’s true, and has such strong wings. Is there just something non-classical in it? It has a skew mechanism, and the new Sikorsky, as I understand it, is not, and the only force that moves it forward is the pushing screw. The presence of a pushing screw does not cease to make it a classic.

Quote: Spade

Well, about the "lockheed", which does not give kickbacks ... Laughing. Their practice of giving bribes led to serious government crises in Japan and Germany. In the latter case, 116 pilots were lost.

I did not say that Lockheed does not give kickbacks.
and if you are talking about F-104, then yes, there was an emergency plane.

the same serial
The Secretary of Defense approved pre-production funding to support an initial production order for 375 aircraft on January 8, 1968. Manufacture of the 10 Cheyenne prototypes was completed by 1969.

Full-scale serial production did not take place purely by chance, 10 pieces were released. There was a general opinion of him as the most reliable, containing less technical risk than competitors. So he was brought to a pre-production state.

[PM9mm]

I read in some article about the Mi-28, saying that the mistake is the adoption of a classic helicopter with a pushing propeller, that you just need to do coaxial machines, like the ka-50, etc., because the Americans now a boom on this ground and this is the future. Really so? Ours, it seems, are not going to do just co-aligners yet. And how are they radically better (except for the lack of a pushing screw)? Here is another link http://www.paralay.com/new_heli/uwk.html

[waggish]

Nice! Very beautiful!

[Prager]

Cyril, as always, gladly gave an excellent article.

[Engineer]

It’s a little unclear what makes it difficult for the author to identify him as a helicopter? Classic push-screw aligner for increased speed.