Military Review

Bypassing competitors. New success for the Sikorsky-Boeing SB-1 Defiant


Experienced SB-1 shortly after rolling out

Boeing and Sikorsky, participating in the Pentagon's Future Vertical Lift (FVL) and Future Long Range Assault Aircraft (FLRAA) programs, are reporting new successes in their joint development, the SB-1 Defiant. During a recent test flight, the machine again improved its speed record and showed compliance with the basic requirement of promising programs. At the same time, the tests are not over yet, and new successes and achievements are expected in the future.

Faster than predecessor

The next flight with the achievement of increased speed took place on June 9 at the West Palm Beach airfield (pc. Florida). In the cockpit of the experienced SB-1 were Sikorsky test pilot Bill Fell and Boeing pilot Ed Hendershade. The main objective of the flight was to accelerate in flight in a straight line with the given modes of operation of the systems, providing for some restrictions.

When accelerating before measuring speed, the power plant worked at half power, which limited propeller thrust. In these modes, the helicopter was able to reach a speed of 205 knots - 379,7 km / h. During acceleration and flight at such a speed, the pilots appreciated the operation of control systems and the power plant.

It is noted that the flight on June 9 demonstrates the compliance of the SB-1 helicopter with one of the main requirements of the FVL program. The objective of the project is to create a promising helicopter that, in terms of its flight characteristics, is superior to the existing serial Sikorsky UH-60 Black Hawk. The maximum permissible speed of the Black Hawk is 360 km / h, or 194 knots. Thus, the new Defianf has already surpassed its predecessor in speed, and the maximum possible performance has not yet been achieved.

Sequence of achievements

Tests of the experienced SB-1 are at a fairly high pace. The overall complexity of the project and emerging problems as a whole do not interfere with their implementation. The helicopter is tested in different modes and gradually shows an increase in flight performance. The achieved results look very interesting, and in the near future it is expected to reach maximum performance.

The SB-1 Defiant prototype began to be built in the middle of the tenth years, and its first flight was originally planned for 2017. Later, the start of the tests was postponed several times due to the need for processing and improvement of the project. The finished car was rolled out of the workshop only in December 2018 and was soon transferred to ground tests.

Helicopter in June record flight

In January 2019, they conducted the first taxiing, jogging and other tests on the ground. The first flight took place on March 21, during which we checked the operation of the systems, maneuverable and limited-speed characteristics. In the following months, SB-1 completed several new flights, including with a gradual increase in speed. In the summer, the car was sent for repair due to a breakdown of the rotor hub. Flight tests resumed on September 24 and continue to this day.

To date, an experienced helicopter, using half the available power, has developed a speed of 205 knots. According to the development companies, using the full power of engines and propellers should ensure a cruising speed of 250 knots (more than 460 km / h) and a maximum speed of at least 500 km / h. The achievement of such indicators is expected within the next few months, however, they cannot yet give an exact date.

Record technology

In fact, the entire SB-1 Defiant project is built around the idea of ​​increasing the maximum and cruising speeds of the project. To solve this problem, original ideas and designs are used that were previously worked out with the help of experienced Sikorsky X2 and S-97 helicopters.

A decisive contribution to flight performance is the special propeller design. SB-1 is equipped with two counter-rotating coaxial rotors. The design of the screws is optimized for operation at high horizontal speeds. For this, blades of increased stiffness and a special shape with curved edges, as well as with curved tips, are used. The original reinforced hub of the screws covered with a fairing was used.

In take-off and landing modes and at low flight speeds, the rotors are responsible for both the creation of lifting force and translational movement. However, a further increase in traction to increase speed may be associated with negative phenomena on the blades. To avoid this, at high speeds, the helicopter creates a lift with both propellers and a tail stabilizer.

Acceleration to high speeds is carried out using a separate pushing screw in the tail. All three screws of the machine are connected by a common transmission with several operating modes, providing for connecting or disconnecting different units. In all modes, two high-power turboshaft engines are used.

In the experimental configuration, the SB-1 is equipped with engines like Honeywell T55 with a takeoff power of 4000 hp. Helicopters with a different power plant should go into mass production. In the interests of the FVL program, a new General Electric T901 engine with an output of over 5000 hp is created, formerly known as the Future Affordable Turbine Engine (FATE).

According to calculations, the use of T55 or T901 engines provides a cruising speed of 250 knots. The introduction of promising products will bring the flight range to 424 km, as required by the mission on the FVL / FLRAA. In the experimental configuration, the Defiant helicopter has a shorter range. However, in both cases, the helicopter of the new scheme surpasses the army UH-60 in all main indicators.

A helicopter with high flight performance can solve a wide range of problems. Depending on its purpose and configuration, the crew can include up to four people. In a closed cabin, the installation of 12-14 seats for passengers or other equipment, weapons, etc.

Tough competition

It should be recalled that the Sikorsky-Boeing SB-1 Defiant helicopter requires not only high flight performance. This machine should bypass a competitor, get a contract of the armed forces and bring profit to its creators. Her rival in the framework of the FVL / FLRAA competition is the upcoming V-280 Valor tiltrotor designed by a group of companies led by Bell and Lockheed Martin.

Competitor SB-1: Bell-Lockheed Martin V-280 Valor

At the moment, the V-280 project is noticeably ahead of the SB-1. The first flight of this tiltrotor took place in December 2017, and only six months later a horizontal speed of 190 knots (350 km / h) was obtained. In October 2018, a new “personal record” was set - 250 knots. Valor cruising speed is set at 280 knots (518 km / h), and this was the first result in January 2019. Tests are ongoing, new achievements are taking place. The maximum speed of the tiltrotor should exceed 500 km / h.

At the moment, two promising aircraft of the FVL and FLRAA programs show similar flight performance parameters, however, there are significant structural and other differences. SB-1 and V-280 have various advantages over each other, and there is no obvious favorite so far.

According to current plans, flight design tests of two aircraft will continue until 2022. After that, the customer will choose the most successful project for further development, which will last until the end of the decade. Serial production of new equipment will begin only in 2030. Deliveries of the winning machine FVL and FLRAA will allow the replacement of obsolete UH-60s to begin.

Thus, the participating companies of the project did not have much time left to demonstrate the capabilities of their developments. Therefore, we can expect that in the near future new interesting news about those or other achievements. But only in 2022 will it become clear whether the recent SB-1 flight was the next step on the path to orders and series.
Photos used:
Sikorsky Aircraft Corp., Boeing Co., Bell Textron Inc.
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  1. Mavrikiy
    Mavrikiy 19 June 2020 05: 27 New
    Beautiful dog. Licked like a plane. Where we are going? request
  2. Ravil_Asnafovich
    Ravil_Asnafovich 19 June 2020 05: 31 New
    Yes, it’s impressive, whoever has the video, put it in advance, thanks in advance.
    1. Ragnar Lodbrok
      Ragnar Lodbrok 19 June 2020 05: 38 New
      yes full of online video
      1. Ravil_Asnafovich
        Ravil_Asnafovich 19 June 2020 05: 56 New
        Thank you.
        1. Ragnar Lodbrok
          Ragnar Lodbrok 19 June 2020 06: 09 New
          To your health, Ravil Asnafovich. I agree with Mauritius, handsome, such a dog!
          What progress has come to! To unprecedented miracles:
          Dipped to the depths and ascended to heaven!
  3. Cowbra
    Cowbra 19 June 2020 05: 34 New
    -13 qualifying.
    One of the words - either Boeing or success - is superfluous. Boeing is synonymous with "screwed up" wink So let's wait, with the refuellers, they also all started with victorious reports. As with the 747 Max, as with the 777, as with the Starliner. While they themselves are experiencing - they lie like breathing, let's see what will happen at the state reception
    1. Obi-Wan Kenobi
      Obi-Wan Kenobi 19 June 2020 07: 15 New
      Boeing is synonymous with "screwed up"

      What are you talking about?
      1. Cowbra
        Cowbra 19 June 2020 07: 28 New
        Boeing 747 Max - no flights around the world. Boeing 777 actually disrupted production due to newfangled decisions on "production optimization". Starliner was kicked into space, after which he sent MCC to catch butterflies at the farm and refused to fly where he was sent. It's fun with the KS-46 refueling tanker. Several units have already been purchased, none of them can work as a refueling tanker, which is why the Pentagon is in panic looking for private offices that could refuel US combat aircraft. For all projects Boeing reported as "breakthrough", "revolutionary", and "unparalleled." In connection with what Boeing at the moment is actually bankrupt.
        Therefore, faith in stories about a helicopter - zero
        1. kamui91
          kamui91 19 June 2020 08: 35 New
          Dinosaurs must die out.
          It will be funny if SpaceX ultimately buys the Boeing space division.
        2. Obi-Wan Kenobi
          Obi-Wan Kenobi 19 June 2020 09: 21 New
          Due to what Boeing at the moment is actually bankrupt.
          Therefore, faith in stories about a helicopter - zero

          You, apparently being in a mode of self-isolation, overdid it with ingestion of weak, fortified and strong antiviral drugs. And then, under the influence of these drugs, they became interested in watching Kiselev and Soloviev.
          Well, the result is on the face ...
          Hmm, that’s what the coronavirus is cunning with people.
          1. Cowbra
            Cowbra 19 June 2020 15: 02 New
            I love bots. Nothing to say, but it must be said. The result is loud and spiritual, like a bunch in a puddle)))
          2. Red_Baron
            Red_Baron 20 June 2020 14: 47 New
            You know how strange it is that you make statements no less loud and much more boorish, but unlike Cowbra you did not give any specifics, nor substantiated your position regarding him in general.
        3. Pete mitchell
          Pete mitchell 19 June 2020 14: 12 New
          Quote: Cowbra
          Boeing at the moment is actually bankrupt.

          Do not bring the Lord to us to see the bankruptcy of Boeing - the whole world will hear. What you listed is just short-term troubles.
          And by the way - do not confuse the materiel
          1. Cowbra
            Cowbra 19 June 2020 15: 06 New
            Nothing, the bankruptcy of Bombardier, for example, was not heard. A lot of things - did not hear. Even the collapse of a peaceful atom in the entire Western world (both offices that could build nuclear power plants were covered up), some kind of left-wing Boeing will be no more loud than the bankruptcy of Remington, the oldest gunsmith in the United States. And what about the materiel?
            1. Undecim
              Undecim 19 June 2020 15: 44 New
              bankruptcy of Remington
              Remington in bankruptcy was only a month and a half.
              1. Undecim
                Undecim 19 June 2020 15: 53 New
                Even the collapse of a peaceful atom in the entire Western world (both offices that could build nuclear power plants were covered)
                Come on.
                1. Cowbra
                  Cowbra 19 June 2020 16: 05 New
                  Not okay. The last block in the USA was built 30 years ago. in France - 20 years ago. The problem is not even that Areva and Westinghouse are bankrupt, but that those who fastened the Whatman paper buttons to the culman with buttons 20 years ago are now retiring! There are no specialists, and there is no one to even teach. Result - see Olkiluoto NPP (NOT built by France) and Vogtl NPP (NOT built by USA). And how exactly was NOT built - a song! For this, both offices in full force should be sent to the bunks.
                  And nothing. no one buzzes.
                  According to Remington, well, here's an article from this year.
            2. Pete mitchell
              Pete mitchell 19 June 2020 16: 52 New
              Quote: Cowbra
              Boeing 747 Max

              ??? And if you are talking about 737MAX, then wait a little and see them in considerable numbers. About their disasters, please do not: there is at least half the wine of drugs. And what kind of 777 are you talking about? All these are temporary troubles for Boeing and the like has already been, no one remembers.
              1. malyvalv
                malyvalv 14 September 2020 12: 35 New
                There it is even about the B-737 itself, but about the approach that Boeing showed in creating a new aircraft. We decided to install new engines, but they won't fit on the old glider. It is necessary to change the design of the airframe and test it again. And this is long and expensive. We decided to save money. We put the engines not in their old place, but a little forward and up. Well, think about it. The plane began to spontaneously turn up its nose in flight. And the garbage question, we will now adjust it with software. But the software in two cases at least did not work as it should. And then somehow half of the blame falls on the crews.
                We have a similar story with the Superjet. They designed it in such a way that other engines will not fit in, and you still need to abandon the French ones. But the glider needs to be altered. The people are crying, biting their elbows, but they do not follow the path of Boeing.
                1. Pete mitchell
                  Pete mitchell 15 September 2020 01: 29 New
                  Quote: malyvalv
                  but in the approach that Boeing showed in creating a new aircraft ..

                  I understand you wanted to say in no competent approach request from the boeinga side. Not using data from two available sensors, but using only one, without signaling a possible failure - this is definitely nonsense, the time will come and they will be greeted with a good screw. About how it was certified - it seems like the FBI is figuring out that they screwed up from the heart ... With the software they wanted to achieve acceptable handling characteristics hand to hand for certification, but we worked with MCAS from idea to implementation: they wanted the best - it turned out not at all good.
                  Quote: malyvalv
                  then somehow half of the blame falls on the crews.
                  But why somehow - the need to control the plane has not been canceled. Even the ores of the fallen cars were not moved back; control was not transferred and they did not systematically fight against failures ... you must have read about the general situation in these companies. CRM specialists will competently call it Swiss cheese.
                  Nevertheless, one of these days in London, representatives of the European aviation authorities will decide whether to start up the MAX or not; tests seemed to fly off.
          2. Grazdanin
            Grazdanin 19 June 2020 20: 59 New
            Quote: Pete Mitchell
            God forbid us to see the bankruptcy of Boeing

            Well go bankrupt, so what? Bankruptcy does not mean the closure of the company, just change hands or reformat the company or whatever else they do. Generally do not care.
            Gulfstream Aerospace Corporation, McDonnell Douglas, Fairchild-Dornier, Raytheon Aircraft, Cirrus, Commander Aircraft Company, Hawker Beechcraft Corporation, Cessna Aircraft, Adam Aircraft Industries, New Piper Aircraft, AASI, Bell / Agusta Aerospace Company, Kestrel Aircraft, Lanearing Aircraft Corporation, Lockheed Corporation - any of them will take the place of Boeing, give only a chance.
        4. Korax71
          Korax71 19 June 2020 16: 42 New
          -64 qualifying.
          Probably all the same, 737 max. With a ban they can somehow figure it out without you laughing this model from 14 to 17 did not have a single accident, it all started after 18 sides collapsed at 2. The Pentagon's use of civilian tankers for refueling Air Force aircraft is no secret to anyone and before that they were used. then sketching? or there is a logic: "let the neighbor's cow die!"
          1. Cowbra
            Cowbra 19 June 2020 16: 56 New
            Quote: Korax71
            this model did not have a single accident from the year 14 to 17, it all started after 18 sides collapsed at 2. The Pentagon used civilian tankers to refuel the Air Force

            What kind of painful delirium? Since 737 max has not yet been figured out and everyone’s downtime is annual million-dollar losses. The problems with the refueling tanker began at the design stage, when they learned that the tanks of the required volume did not climb into the passenger plane initially, and the tanker’s catastrophe near Japan was with Lockheed KS-130, not Boeing, and it was KS-46 that didn’t take off:
            The US Air Force is extremely dissatisfied with the Boeing’s proposals regarding the refinement of the “remote [tele] vision" system for the refueling operator on the milking Pegasus KS-46. In fact, due to the inability of the operator to work normally in a combat situation, the Air Force is already thinking about an “alternative” for the KS-46. At least about private contractors, at least for non-combat conditions ...

            On the third day, the US Air Force specifically abandoned the plans proposed by Boeing to refine the television system. Boeing agreed to bring the system software package at its own expense and ... in just three to four years. And the Air Force has already taken 30 "Pegasus" and will take it further, not even knowing when they have reached full "combat readiness"!
          2. Cowbra
            Cowbra 19 June 2020 17: 00 New
            Nate to you about Boeing))) They will figure it out, yes:
            1. Korax71
              Korax71 19 June 2020 19: 13 New
              Why not a link to the messenger of Mordovia laughing Are you kidding me ???? angry just for the sake of interest, I went over the articles of this spark. in short, the comrade simply collects all the icteric info that can only be posted in his own zheshke. No.
              1. Cowbra
                Cowbra 19 June 2020 19: 49 New
                You can not understand. You do not at all operate with any information other than the one expressed above. Look who Firsov is. It's just that he doesn’t write everything in technology and weapons
        5. Evgeny Goncharov (smoogg)
          Evgeny Goncharov (smoogg) 21 June 2020 08: 15 New
          You somehow paint very long. It would be simpler for us voters: when does the sworn west decay?
          1. Cowbra
            Cowbra 21 June 2020 09: 01 New
            In minStets, ask the new leader, and which of you are voters? Whom Soros appoints you - he and the president
            1. Evgeny Goncharov (smoogg)
              Evgeny Goncharov (smoogg) 21 June 2020 22: 08 New
              Every Russian patriot is a great expert in the election, although it would seem. Apparently, demented balabolstvo is a generic sign of a patriot.

              Hello from St. Petersburg.
              1. Cowbra
                Cowbra 21 June 2020 22: 12 New
                Quote: Evgeny Goncharov (smoogg)
                Hello from St. Petersburg.

                Will screw up, will burn! Well, to someone "patriot" is an insult. Apparently born not in the Hero-City, but in the "shelter of the poor Chukhonts"
                Come on, unpatriot - object to the case - is there anything? Or so - croaked - and in the mud, frogs to catch?
                1. Evgeny Goncharov (smoogg)
                  Evgeny Goncharov (smoogg) 21 June 2020 22: 18 New
                  Well, to someone "patriot" is an insult

                  Diagnosis, be honest.

                  object to the case - is there anything?

                  I would very carefully look at any real documentary evidence of Boeing's bankruptcy. These, I suggest, are not those that whisper the voices in your head.

                  Well, or on the exact date of decay of the strongholds of imperialism, choose to your taste.
                  1. Cowbra
                    Cowbra 21 June 2020 22: 20 New
                    In short, the flood to shame - not to this portal. You have nothing to say, agios
                    1. Evgeny Goncharov (smoogg)
                      Evgeny Goncharov (smoogg) 21 June 2020 22: 21 New
                      Wait a minute, Boeing is not bankrupt, or what? But you said ...
        6. sg7s
          sg7s 29 October 2020 13: 29 New
          And look, what the hell, he flew on an attached second and indicated to turn off the pump, and two 737s fell and voila ... Morality - teach materiel ... By the way, our education is also falling, Ulyanovsk will NEVER replace Aktyubinsk and Kirovograd ...
    2. vadim dok
      vadim dok 19 June 2020 14: 33 New
      Superjet is where success is!
  4. shinobi
    shinobi 19 June 2020 05: 47 New
    My question arose. But why don’t they use a jet stream from dviguns for acceleration? In theory, it should be enough. The design will turn out easier. And here is a pushing screw, some kind of archaic.
    1. Undecim
      Undecim 19 June 2020 07: 12 New
      Turboshaft "engines" do not have a thrust-generating nozzle and, accordingly, there is no "jet".
      1. Aviator_
        Aviator_ 19 June 2020 08: 37 New
        Quite right, almost all the energy is taken to the shaft (that’s why the name is), almost nothing remains in the remaining exhaust.
      2. Zufei
        Zufei 20 June 2020 20: 58 New
        10 percent remaining.
    2. prodi
      prodi 19 June 2020 09: 30 New
      in principle, this can be done, according to the F-35V type, but the helicopter has no important fuel economy, and for speeds of 500 km / h there is little sense in a jet propulsion.
      Another thing is a tiltrotor of the Valor type (photo in the article): here it would be possible to "unload" huge propellers when they turn and stabilize the transient mode by transferring thrust to the jet stream
      1. shinobi
        shinobi 19 June 2020 12: 06 New
        The Germans in the late 60s had an interesting concept of transport, vertical take-off and landing. Dornier 31. It would be interesting to see what came out of it now, with modern economical engines
        1. prodi
          prodi 19 June 2020 13: 44 New
          nothing would have happened there, it must be assumed that modern Amer’s crafts are already the maximum that could be squeezed out of this idea
        2. Undecim
          Undecim 19 June 2020 15: 25 New
          The Germans in the late 60s had an interesting concept of transport, vertical take-off and landing. Dornier 31.
          In those years, such an idea was popular; not only Germans worked on it.

          One of the options is Armstrong Whitworth AW.681.
          1. Undecim
            Undecim 19 June 2020 15: 26 New

            Bristol 208
            1. shinobi
              shinobi 22 June 2020 04: 34 New
              Oh, oh! I didn’t come across this. Thanks for the info comrades hi I’ll start a comp
    3. Pandiurin
      Pandiurin 25 August 2020 19: 41 New
      "And here is a pushing screw, some kind of archaic."
      The screw is obviously with variable pitch or reverse. Those. he can not only push forward but also pull back.
      Those. the helicopter can tilt forward but not move forward, but stand still or even move backward.
      I am not an expert in helicopters, but it seems to me that this, for example, makes it possible to work with nourishes being close to an obstacle.
      Maneuvering and aiming become more independent of each other.
  5. The leader of the Redskins
    The leader of the Redskins 19 June 2020 06: 20 New
    If possible, I keep track of information about this car. I am sure that she has a thorny but sure path to success. This helicopter, like Osprey, will occupy its niche in the lineup.
  6. mvg
    mvg 19 June 2020 08: 45 New
    Mi-8, in different guises, our ALL! Perfection does not require modernization. Just like Zhiguli 2101-2107, 50 years old, almost unchanged ... Or UAZ-469. Let the bourgeois come up with something ...
    1. Lt. Air Force stock
      Lt. Air Force stock 19 June 2020 11: 33 New
      It is being modernized, there is Mi-171A2, now the Mi-38 is undergoing tests.
      1. mvg
        mvg 19 June 2020 21: 51 New
        It is being upgraded

        The essence of this does not change. This is the development of 1960, the first flight of 1963, serial. Lada also modernized, the engine, interior, etc., but as was the "penny", and remained. Our design bureaus froze on the spot. There is nothing new. Or does not reach the series.
        1. Grazdanin
          Grazdanin 20 June 2020 15: 12 New
          Quote: mvg
          Our design bureaus froze on the spot.

          And besides Sukhoi, is there anything left? This question began to torment me
        2. Lt. Air Force stock
          Lt. Air Force stock 21 June 2020 14: 59 New
          Well, in the USA, the Boeing 737 is also being modernized, and not creating a new one, the Mi-171A2 is equipped with modern avionics. The Mi-38 has blades made of composites, the helicopter set several records for the maximum ceiling.
          1. 3danimal
            3danimal 24 June 2020 03: 27 New
            So Kopek can be equipped with a projector on glass, a digital speedometer, the ignition is done from the button .. Put alloy wheels and Michelin wheels.
  7. Sidor Amenpodestovich
    Sidor Amenpodestovich 19 June 2020 09: 26 New
    I wonder how much it will cost?
  8. exo
    exo 19 June 2020 12: 46 New

    As far as I know, Kamov Design Bureau had good developments. But, they did not receive further progress.
    The coaxial scheme is perhaps more promising for a high-speed helicopter. That is what the Americans confirm.
    1. nks
      nks 20 June 2020 10: 40 New
      The Americans confirm another, but the speed record for helicopters in airbus x3, which is not coaxial. .
      1. exo
        exo 20 June 2020 12: 06 New
        The Americans confirm this. The coaxial design leaves the tail part free to accommodate a thrust propeller engine (or other option).
        1. nks
          nks 20 June 2020 12: 45 New
          Hm. x3 / racer leaves the tail part completely free, although it was possible to place pushing screws there. SB-1 now shows a more expensive and less elaborate solution, which now shows the worst result.
  9. exo
    exo 19 June 2020 14: 39 New
    Here, such a variant, presented Kamovtsy
  10. iouris
    iouris 19 June 2020 17: 20 New
    I think the speed of sound is not exceeded.
    1. iouris
      iouris 20 June 2020 13: 30 New
      By the way, no competitors are visible.
  11. tarackanovaleksei
    tarackanovaleksei 19 June 2020 23: 08 New
    In general, this seems to be a gyroplane with a saosnoy scheme of screws. When overclocking this ... Shnyaga, (let's say) over the high-speed parameter on the rotor blades, this design will collapse to the ground. What is it to be smart? And then, this is a prototype, so to speak. Things will not go further than him.
    1. Maki Avellevich
      Maki Avellevich 20 June 2020 11: 13 New
      Quote: tarackanovaleksei
      In general, this seems to be a gyroplane with a saos scheme of screws.

      In general, this is a coaxial sehema ane aaosnoi. you are so categorically reflecting on the topic of aerodynamics and the name of the system is somehow wrong with you, it turns out to write.
      Quote: tarackanovaleksei
      When you disperse this ... Shnyaga,

      where does this neglect come from, what is it based on?
      1. iouris
        iouris 20 June 2020 11: 52 New
        "Learning is light, and the ignorant is darkness." As soon as I become president, the first thing we will do is create a Cheka to eliminate the illiteracy of the electorate, and if there is no war, then in fifty years it will be a completely different country. Until then, universal suffrage should be abolished.
        1. 3danimal
          3danimal 24 June 2020 03: 31 New
          Do not forget to blame the enemies of the people for all your failures, with mandatory acts of intimidation of the electorate good And the elections are generally harmful to the dictatorship, only wasting money.
      2. tarackanovaleksei
        tarackanovaleksei 27 September 2020 22: 26 New
        Come on. Don't get excited. Sorry if I'm jargon. Tune in to your knowledge, concentrate and imagine the work and movements of this machine (mechanism).
  12. Outsider
    Outsider 22 June 2020 03: 34 New
    Quote: shinobi
    My question arose. But why don’t they use a jet stream from dviguns for acceleration? In theory, it should be enough. The design will turn out easier. And here is a pushing screw, some kind of archaic.

    - He creates much bоlower thrust than could be obtained from the remnants of jet jets - too much of the thermal energy already triggered here on the rotors. In addition - so much higher fuel efficiency.
  13. trahterist
    trahterist 28 June 2020 19: 52 New
    Westland Lynx AH1-400km / h.
    Yes, a record instance.
    But, this is already in the "dense" 1986.
    And without a pushing propeller.
    So this ... ostentatious demonstrator with a bunch of children's sores (as the memorable F-35 to this day).
  14. trahterist
    trahterist 25 August 2020 19: 56 New
    "A special scheme of screws" has been used in the products of the Kamov Design Bureau for more than 70 years, moreover, it is quite serial.
    And here it is presented as if a revolution in aircraft construction ...
  15. Black Colonel
    Black Colonel 29 August 2020 19: 38 New
    A pusher helicopter is a dead-end development. Tiltrotor - this is the further development of high-speed machines with vertical takeoff