The latest American helicopter SB 1 Defiant passed the next stage of testing

The American company Sikorsky continues work on the creation of a promising high-speed multi-purpose helicopter SB> 1 Defiant. Another completed was the first stage of purging tests of the helicopter model, according to the results of which the designers came to the conclusion that the helicopter could fly at a speed of 270 knots (500 km / h). This is reported by the online edition Nplus1 with reference to the Flightglobal portal. Modern helicopters cannot fly at this speed due to many limitations, including flutter (self-excited, continuous bending and twisting self-oscillation) and the effect of locking the rotor.

During the purge tests, the company's specialists used a 1: 5 helicopter model. Tests carried out in a wind tunnel at NASA's Ames Research Center have shown that the promising SB> 1 helicopter will be able to perform high-speed flights. The second stage of the blowdown tests, which will begin in the same month, will allow clarifying the speed characteristics of the helicopter.

The multipurpose high-speed helicopter SB> 1 Defiant is created on a competitive basis as part of the US Army program to create a family of promising army helicopters. aviation... Development has been underway since 2015. It uses the developments obtained during the development and testing of demonstrators of high-speed X-2 and S-97 Raider helicopters. The helicopter weighs 13,6 tons. It will be able to reach speeds of up to 250 knots (463 km / h) and carry 12 troops. The machine is built on a coaxial scheme with a tail pusher rotor. Ground tests of individual SB> 1 units and assemblies have been carried out since the spring of 2018, ground tests of the helicopter began in January this year, and the first flight is scheduled for this year.

To date, the projects of the V-280 tiltrotor of the Bell Helicopter and Lockheed Martin consortium and the SB> 1 Defiant high-speed helicopter of the Sikorsky and Boeing consortium have reached the final of the program to replace the entire fleet of American helicopters. Demonstration flights within the announced tender for the supply of helicopters are scheduled for 2020.

Comments

[Gray brother]

That is, they first build a healthy prototype demonstrator, and then blow the MODEL in a wind tunnel?
Somehow through one place everything is with them.

[Alex_You]

Everyone would be like that in one place.

[Gray brother]

Quote: Alex_You

Everyone would be like that in one place.

Judging by the results, we can assume that the Ukrainian Molot mortar was designed by the same method.

Therefore, I would not wish this to everyone, I am a kind person.

[Thunderbolt]

Quote: Gray Brother

That is, they first build a healthy prototype demonstrator, and then blow the MODEL in a wind tunnel?

In the photo, the S-97 Raider, and SB> 1 Defian is being created on its basis. You really take them for simpletons.

[Gray brother]

Quote: Thunderbolt

The photo shows the S-97 Raider, and the SB> 1 Defian is based on it.

And the first one didn’t fly? Also forgot to blow?

[Thunderbolt]

Quote: Gray Brother

And the first one didn’t fly? Also forgot to blow?

Flew, flew, but he is a technology demonstrator, but for the bird under discussion there may be a large order from the Pentagon.

[Gray brother]

Quote: Thunderbolt

Flew, flew, but he’s a technology demonstrator,

Probably set a speed record.

[Lopatov]

Quote: Gray Brother

Probably set a speed record.

No. But they did not require records from him.

[Gray brother]

Quote: Spade

No. But they did not require records from him.

But it’s precisely for the sake of speed that the propeller was inserted into the ass, that is, it must show superior characteristics, otherwise there is no special sense in it.

[Lopatov]

Quote: Gray Brother

But after all, for the sake of speed, the propeller was inserted into his ass

Everything is much, much more complicated there. For example, the higher the speed of the helicopter, the slower the rotors should rotate. Therefore, no records were needed. We needed to refine the methodology itself.

[Gray brother]

Quote: Spade

. We needed to refine the methodology itself.

I smoked a little topic and found out that they worked out the technique on the previous machine. On the X-2.

Then they made it seem like a military series, they did not finish it and now they are sawing another one that will be "better".
I would not be surprised if, in the end, this one is abandoned, and the third one starts cutting which will be "even better".

[Topgun]

you smoked something but didn’t smoke
the one that you have in the photo is really a test on which they worked out the technology
then comes the Raider - it is supposed to be percussion (like mi 24)
Well, the one in the photo for the news is already multifunctional, carry people, loads and you can do shock modifications
no one "scored" on the raider, then the word for the military ...

[Mih1974]

Let's "look at the chickens", but while the Merikases are shutting down one "super duper breakthrough" weapons program, they are dismantling something from the aviks !! Even an amateur understands that overclocking a helicopter with a "draft up" design is, if not impossible, then incredible The model of the fantastic "litaka" from the movie with Schwartz about the clones (the sixth day or something) will be implemented sooner. There is at least a more or less logical design with flexible screws (it's not for me to judge how realizable it is).

[Lopatov]

Quote: Mih1974

Even for an amateur it is clear to me that it is incredibly difficult to accelerate a helicopter with a "draft up" design, if not impossible.

The joke is that at high speeds it is no longer a helicopter, but rather a gyroplane.

[orionvitt]

Quote: Mih1974

Let's "look at the chickens"

Yeah, well. I was hinted about the Mask, the minuses flew above the roof. America is above all, even when it does nothing.

[Mih1974]

I sympathize - here on the site there are a lot of "minusyators" of liberoid orientation, so humble yourself and do not pay attention. Keep an eye on what you write - otherwise they will "shoot" and wake up "Chukchi is not a reader, Chukchi is writing" (in your case, vice versa).

[Greenwood]

Quote: Mih1974

liberoid orientation

My question is: do you write all those who do not litter America into liberoids? Do you consider this a manifestation of patriotism?

[Mih1974]

I believe that Russian citizens are not patriotic towards Russia and are acting NOT in the interests of Russia and its citizens - liberoids and Enemies of the People, whom (enemies) are subject to the precepts of Comrade Stalin with a polonium ice ax on the head !!
If a certain person is not being a citizen of Russia, then something is blinking as an citizen, then this is a liberoid and a messenger. You need to kill such people with any way you like, at least press on the rink, at least put them on the pitch, mm, from the old days they still cooked in oil meedleno.

[kapitan92]

Quote: Gray Brother

That is, they first build a healthy prototype demonstrator, and then blow the MODEL in a wind tunnel?

When conducting purge tests, company specialists used a 1: 5 helicopter model.

[UMA-UMA]

Aha. They are all smart. By the way, what about the nanogenial development of the Russian Federation - an ultra-fast helicopter? As always they said that there is no tax in the world, but in the world it turns out we have already jumped here for a long time: we have only plans and a desktop figurine, they have purge tests.

[bulvas]

Quote: UMA-UMA

Aha. They are all smart. By the way, what about the nanogenial development of the Russian Federation - an ultra-fast helicopter? As always they said that there is no tax in the world, but in the world it turns out we have already jumped here for a long time: we have only plans and a desktop figurine, they have purge tests.

Over the Vanguards and Poseidons, they also wrote something like this "does not have any analogies in the world",
and they laughed at the nuclear engine,
and what do they write and say about this now?

Let's wait - see

[UMA-UMA]

What do they say? They say that cartoons are clumsy, and Poysedon since Soviet times. And most importantly, you need to be able to click on the button, and this is a problem.

[bulvas]

Quote: UMA-UMA

What do they say? They say that cartoons are clumsy, and Poysedon since Soviet times. And most importantly, you need to be able to click on the button, and this is a problem.

In the Pentagon they say that they have no means against the Vanguards and Poseidons, they will work on it, they need money.

As for "be able to press the button" - these are your "cartoons" and the problem is only in your head.
History says something else:
- for a thousand years they pressed and more than once, so much so that for a long time they bent off any desire to try.

If they try again, there may not be any chances for the future, for the "samplers".

Want to try checking?

[UMA-UMA]

1. In the pentagon, suckers are bred - they cheer up and pretend that it’s scary for the Russian Federation to merge the remnants of its economy in the arms race. The receiver is known since the days of the SDI.
2. I have no problems just do anywhere else. Unlike sofa experts, I stung where I needed it at one time. And your loud and empty words only shake the air, under the silence of the c300 in Syria - if you press weakly there, then leave hope to everyone who enters here.

[bulvas]

Quote: UMA-UMA

1 - In the pentagon, suckers are bred - they cheer up and pretend that it’s scary for the Russian Federation to merge the remnants of its economy in the arms race. The receiver is known since the days of the SDI.

And nothing that NATO "cartoons" has already assigned codes according to its classification?
They are also "bred suckers"?

Quote: UMA-UMA

2. I have no problems just do anywhere else. Unlike sofa experts, I stung where I needed it at one time. And your loud and empty words only shake the air, under the silence of the c300 in Syria - if you press weakly there, then leave hope to everyone who enters here.

Very happy for you

I didn’t sting, but I put a little of my strength into creating what you "reaped"

-------------------------------------------------- -----------

I don’t understand the grunts of your kind.

Are you suggesting that our children and grandchildren be driven back into military communism?

So the time has already passed, start building communism again, the remnants of the talented people will simply scatter, as they are now fleeing from Ukraine

Young people will not invent robots in circles, but will rush wherever they look and anyone, if only to stay away from your ideas and your grunts

Even in the 20s, illiterate, hungry and poor people had to force them to follow the right path, the only right one for that situation.

Now it’s completely different, and the way is different

Start a new restructuring now, no matter in which direction, and the end of the country

[UMA-UMA]

1. I do not grumble, but express my point of view, which by the way is shared by many tens of millions of citizens. He was a communist, he didn’t hand over a ticket and didn’t hand it over, he didn’t build communism, he never blasphemed the Soviet past, on the contrary, I’m proud of it, he fulfilled his duty to his homeland.
2. Conversely, I am not calling for the construction of communism, for it is clear that this is impossible. But the situation in the country is very worrying, despite all the efforts of propaganda (however, these efforts did not pass by you), it is quite obvious that the situation is in crisis. We are not even talking about individual shortcomings; the entire state system of the Russian Federation is one continuous flaw.
3. About circles and robots, did you watch this on TV? The authorities do not like Russian children, which is why they die in industrial and road crashes, fall into hungry fainting and pass an exam like in a concentration camp.
4. Tell me, do you think that children in the USSR did not study in technical circles? Yes, and tell us how you in the Soviet Union suffered from war communism.

[bulvas]

Quote: UMA-UMA

Yes, and tell us how you in the Soviet Union suffered from war communism.

I'm not young, but not so old as to feel the military communism of the 20s and 30s

War communism was necessary at the time.

And in general, there is a lot of talk about the Communists, but they proved themselves in the 80s, they didn’t just take the country to their hands, they stole all the country's wealth, they also ruined the USSR in order to seize power and keep the loot with them.

How can you recall them with good words?

I understand that not everyone was like that, but it was the CPSU, which won the war, saved and restored the country, was reborn so much that it destroyed and plundered this country.

And what do you want to convince me of after that?

And why is modern Zyuganov better - he always hobnobbed with oligarchs and "red directors", kept criminals and traitors to the country in his ranks

The power of children does not like?
Yes, children at least eat tasty things, fresh fruits in any part of the country, and toys are no worse than in other countries

Write what you want, but I see:
- in the courtyards there is nowhere to put cars, in supermarkets the people are loading carts, thousands are being built in cities, millions of young people are buying apartments, a huge number of country houses are being built ...

So, finish your mossy propaganda.

You can do it better - get involved, at least in your yard or on the landing

[UMA-UMA]

Maybe enough to teach me ?! Mossiness is about you, and I don’t need to tell about the welfare of the masses. So for your information - I have no material problems - my income is much higher than average. I do not consider it necessary to comment on your fantasies about the horrors of Stalinism - you cannot be persuaded. Just because the people got rich and the standard of living improved, why did the level of life expectancy in the Russian Federation collapse in comparison with the Soviet one? Why so infant mortality soared? From a good life this does not happen. You talk about yourself, but you are not the whole of Russia, there are 146 million people besides you. 30% of them live below the poverty line.

[bulvas]

Quote: UMA-UMA

I do not consider it necessary to comment on your fantasies about the horrors of Stalinism - you cannot convince you.

You didn’t confuse me with anyone?

Do I have a word about Joseph Vissarionovich?

Actually, I respect him

So, I treat the rest of your pearls with the same distrust as your sanity as a whole, we say goodbye to that

[UMA-UMA]

Terrified of the 30s and with respect to Stalin ... Do not you think that this is somehow contradictory, a split for some reason. All the best.

[bulvas]

Quote: UMA-UMA

Horrified by the 30s

Something you get confused.

I never wrote this

Or do you subconsciously consider the phrase "war communism" horror?

I don’t think so.

And the fact that the Communists of the 80s became the country's greatest traitors and grave diggers of the USSR is true

And first of all, thanks to the CPSU for the 90s.

In Russia, they do not like and do not trust traitors.

Therefore, the Communists do not shine anything else in Russia

Let them sit in opposition, I do not mind, criticism of the authorities is never superfluous, but no more.

Moreover, there is the Liberal Democratic Party as a counterweight to the Communist Party, that's right

[UMA-UMA]

80s-90s, yes I agree with you. This is a direct result of de-stanza, in the sense of control systems. The sadness is different - the current ones are many times worse and the same mistakes are repeated: the arms race, unnecessary expenses to help incomprehensible regimes, mediocre economic policy

[bulvas]

Quote: UMA-UMA

The sadness is different - the current ones are many times worse and the same mistakes are repeated: the arms race, unnecessary expenses to help incomprehensible regimes, mediocre economic policy

Disagree

I’m not going to praise the government, but I don’t think that anyone could do better.

There can no longer be a return to a fully state-owned economy, and there are few people who can take responsibility and have little knowledge and experience.

Not grown yet.

There are many "specialists" to cut and roll back, and there are very few of those who know how to build and create

That is the reason

Frames will grow - we will see the result.

Or we won’t see, but we will not care anymore

The government is doing what it should - the military-industrial complex, infrastructure, social programs.

It is necessary to create an infrastructure for entrepreneurs.

What prevents in the forest regions of the country to create maximum conditions for the development of woodworking?

Laws, incentives, subsidies, production areas, etc. etc.

And strictly ban the export of roundwood

In 5 - 10 years, these investments will turn into a golden rain for the country

In these and similar matters, the government is still far from perfect.

[UMA-UMA]

Hmm ... i.e. statistics for you an empty phrase? All indicators of the Russian Federation are not just worse, but many times worse than Soviet ones, every year the situation and indicators are only getting worse, but you still say that the government is normal .... And what kind of forest ?! We live in the 21st century, now the forest does not bring money and development: mechanical engineering, biotechnology, biomedicine, biochemistry. This is the future, and actually the present.

[bulvas]

Quote: UMA-UMA

Hmm ... i.e. statistics for you an empty phrase? All indicators of the Russian Federation are not just worse, but many times worse than Soviet ones, every year the situation and indicators are only getting worse, but you still say that the government is normal ...

On this occasion, I say that the CPSU caused great damage to the country, after this, you have to forget about the Soviet government and the CPSU.

How can you compare the statistics of the USSR and the current? After the devastation, and most importantly, after the enormous loss of human resources.

You probably can’t even imagine how many specialists left Russia

I was at the Intel branch in Israel.
My friend works there. He led me upstairs, where developers sit in open niches and freely talk to each other.
So, there is only Russian speech heard

And so in everything!

Their economic growth in all high-tech industries and in the military-industrial complex began thanks to specialists from the USSR.

So this is just a tiny Israel

I know about our specialists in the USA, Italy, Germany, Japan, even Portugal!

These are millions of the best engineers and scientists.

And you are comparing.

I understand you better than hi-tech about it, the programmer himself, but don’t treat traditional production with such neglect.
The same woodworking is now at a completely different level of development and it pulls all kinds of technologies

[UMA-UMA]

1. The Communists went to an agrarian country lying in the ruins of a civil war. A country in which 70% of the population were illiterate. By the 90s, the country was a superpower with a share of global scientific achievements of more than 30%. Great communists ruined the union. Now the share of the Russian Federation in scientific achievements is less than a percent. I don’t even want to give a list of destroyed industries - practically everything. Those who did all this humpback, the Yeltsin team — the national heroes of the Russian Federation — this speaks of everything that you want to power.
2. Yes, yes, in the USSR there was biased statistics. The most objective in Rosstat.
3. The surge in emigration fell precisely on the rule of Eltsin. And the reason for the Israeli miracle (by the way, greatly exaggerated) is not only and not so much in the influx of Soviet specialists (here it is from the damned communists), but also in constant subsidies. Only American American 170bn., Including purchases. Abilities of the dollar in different years feel free to multiply by 5.
4. I tell you about biotechnology, you tell me that woodworking is more technologically advanced. Typical properties of IT people are to live in their virtual world and stubbornly assert that this is the truth.

[bulvas]

Quote: UMA-UMA

UMA-UMA (UMA-UMA)

you rolled down to dogma again

[Gray brother]

Quote: STALIN IS ALIVE

On a red helicopter
They give us apartments
Youth goes to the machine
And the wealth of the people is forged.

Is this a translation from English galleries?

[Gray brother]

Well, why did I read this, huh? Now this is playing in my head:

[2329 Carpenter]

Gray, he did this selfie for what instead of his brain.

[snake]

Quote: STALIN IS ALIVE

On a red helicopter
They give us apartments
On a Soviet helicopter
My table is full of food

"On the carpet - a helicopter
Past the rainbow.
We fly while you crawl
Freaks you are freaks. "

[HMR333]

they blow the budget all clearly and with imagination about violations of the laws of physics and dynamics))

[Vol4ara]

Quote: HMR333

they blow the budget all clearly and with imagination about violations of the laws of physics and dynamics))

We should blow like that

[Gray brother]

Quote: Vol4ara

We should blow like that

Wishing a lot, get in line.

[dirk182]

it’s such a sore subject that it’s better not to start

[Back]

Yeah, just recently they said that about the laser, and suddenly, as if on command, they were silent. And physics is already in order, smoke, snow and other tin hats do not interfere.

[Flyer_64]

Modern helicopters cannot fly at this speed due to many restrictions, including flutter (self-excited, continuous, bending and rotating self-oscillations) and the effect of locking the rotor ...
When conducting purge tests, company specialists used a 1: 5 helicopter model

That is, the Americans faced flutter on the blades of a new design. Flutter is a self-excited oscillation of the rotor blades, due to the energy of the air flow and leading to a rapid increase in the amplitude of the flywheel motion of the blades. Flutter is especially dangerous for a coaxial circuit, since the blades overlap due to this effect. Hence the transition to a model purge. In general, what happened was what the experts in the field of helicopter industry predicted. With an increase in size and weight, it will lead to the creeping out of the same problems that were in the last century at the dawn of helicopter construction. This is another confirmation that computer design and modeling has some drawbacks.
On modern helicopters, the problem of flutter is solved by the installation of balancing weights. The design of the blades used by the Americans differs from the classics, has a different section along the entire length. If they succeeded on a smaller screw diameter (this is the Sikorsky S-97 experimental coaxial helicopter), now there are problems with the helicopter with a larger mass and a larger diameter of HB.
Sikorsky Design Bureau has never tried to deal with the coaxial scheme, but they never brought a single helicopter to commercial use.

[Voyager]

So the Americans began to use coaxial screw technology ..

[XXXIII]

The latest American helicopter SB 1 Defiant passed the next stage of testing

Interesting car ... Interestingly, this is a hybrid helicopter or corvektoplan or a new technology .....
It is also interesting what speed will be with weapons, if it is being developed for the US armed forces ....

[Rzzz]

It’s not really a helicopter, it’s called something like a helicopter. Here, the main rotor does not create horizontal thrust, but is used only for take-off, like on a regular helicopter and as a kind of rotating wing in the horizontal flight mode. Therefore, coaxial screws are used, otherwise in any way, at high speeds, a blade moving backward loses much in lifting force.

[bone1]

And how many more stages of testing are there? -When will they be adopted? -When will they begin to find and eliminate defects?

[XXXIII]

Quote: Bone1

And how many more stages of testing are there? -When will they be adopted? -When will they begin to find and eliminate defects?

Everything is like the F35, as they announce the price, they will find defects, but they will buy everything exactly .....

[Ironclad]

Judging by the photo with the coaxial rotor system they are not quite all smooth!

[Topgun]

but more specifically you can?
for what i see

Quote: Ironclad

Judging by the photo

they are already "ahead of the rest" ...

[Ironclad]

Yes, you have Januses in everything "ahead of the rest"! Except for Kamov, no one conducted such a time of using the coaxial system! And your Januses see her for the first time! So the bulky design of theirs "carlson" turns out!

[Topgun]

"bulky construction"? :) have you forgotten what the 2-storey Kamov helicopters look like? everything is very compact here.

[Adimius38]

It seems Kamov helicopter studied

[cat hippopotamus]

To pay tribute to the Sikorsky company, they build not bad and quite reliable helicopters. This new generation model is fast enough and approaches the speed of an aircraft.

[voyaka uh]

Rational layout, all the same - tiltrotor.
Takeoff - helicopter propellers.
Flight - the same propellers in an airplane.