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Can I make a cult of helicopter speed

# Can I make a cult of helicopter speed

"500 kilometers per hour without stalling" 07.08.2017

"Two new helicopters, civil and military, will be sent to Russia in the coming years. The know-how of our helicopter builders will enable them to develop record speed and press competitors on the world market.

"One of them (the civil version -" Stimulus ") will be made according to the traditional aerodynamic scheme, with one rotor and the other - coaxial, with two screws," Director of the Aviation Industry Department of the Ministry of Industry and Trade Sergey Emelyanov told reporters on Thursday at the HeliRussia exhibition . According to the official, in the course of research work on the PSV program, two problems have been identified: blades and additional propellers - motor energy converters. "

"Meli Emelya is your week!" (Proverb)

"It has already been determined that a car with one screw can reach a speed of 450 kilometers per hour. But it is not possible to get higher, "Yemelyanov said. - As for the co-axial scheme, here Kamov Design Bureau is working out the car at a speed over 500 kilometers per hour. This is done in the interests of the Ministry of Defense. "

"Fresh tradition, I can hardly believe it" (Chatsky).

450k / h, and only "over 500k / h" = ???

Cruising speeds of helicopters currently make 250-300 / h. and with an increase in speed greater than 350k / h, the efficiency of the horizontal component of the main rotor thrust drops sharply. Let me remind you that the record speed Mi-24 = 368k / h.

In the Mi-X1 project, from the designers of the MVZ, the tail rotor in flight had to perform the functions of the propulsor and then the helicopter would be able to accelerate to the speed of 520k / h. But here - "noodles"!

Why?

It's simple: the circumferential rotational speed of the rotor blade end of the helicopter Mi-24 = 217m / s, which corresponds to the speed of 780km / hour.

At helicopter flight speed = 500k / h. at the left half of the main rotor (counter-flow) the total speed will be: 780k / h + XNUMxk / h. = 500 / h.

On the right side, the incoming airflow will be a by-pass and, accordingly, 780k / h - 500k / h. = 280k / h, i.e. the difference in speed of the left and right sides of the rotor's main rotor will be: 1270k / h - 270k / h. = 1000 / h.

Accordingly, the difference in the lifting forces of the left and right sides of the main rotor at this speed will be such that the uncontrollable roll appears much earlier than 450k / h, which even the Milev test pilot Gurgen Karapetyan can not cope with!

In coaxial helicopters, the two screws rotate in opposite directions, which stabilizes their flight: the propellers of the opposite sides will balance each other. But even at Ka-92 coaxial helicopter, according to the general designer S.V.Mikheev, the maximum speed is supposed to be up to 460k / h. (According to S.Yemelyanov - "over 500k / h"), and the cruising speed = 420-430km / hour. In addition, propulsion (pushing) propellers, rigid rotor blades and lowering their rotors are provided in this project. as the speed increases, which allows you to push the flow separation boundaries from the ends of the blades towards a higher flight speed.

The Mi-24 flying laboratory does not have such a possibility due to the lack of a propelling screw - and this is another problem in increasing the helicopter cruising speed, so there is no talk of 450km / hour.

It is puzzling and the fact that with a maniacal persistence continues the mass release of long-obsolete Mi-8,

And this despite the fact that already with 2001y there is a real opportunity to replace it with a more advanced Ka-32-10 helicopter, and today - even more advanced Ka-32-10AG.

It does not fit with the reality that our raw Army, instead of the outstanding three-time winner of the shock Ka-50 "Black Shark", continues to supply raw Mi-28N, which even in Syria brought a catastrophe, killing two high-class pilots.

It is necessary to think that not from a good life, Minister of Defense SK Shoigu allowed to take girls to Krasnodar School. The service of a fighter pilot is clearly not a woman's job and for this reason the "Black Shark" combat helicopter should represent an invaluable find for the State. And the beautiful words about the "Night Hunter" are for our comfort and the report to Vashobkom: "Another legendary representative of the" air cavalry "- Mi-28N" Night Hunter "is successfully modernizing.

Since when did Mi-28 become "legendary": for incomplete 10 years on its account, five "hard landing" on the design flaw, of which three - with human casualties. That's probably why the commander-in-chief of the VKS is looking forward to the modernized version of this, sorry for the expression, of the "legendary" helicopter:

"According to Bondarev, the modernized helicopter Mi-28NM" Night Hunter "with dual control will begin to serially enter the troops from 2018 year. "There is not a single backlog in Mi-28NM, it's a fine helicopter, we really need it" (TASS, Army and Defense Industry 23 July).

"We really need him." And to whom is "us"?

The state and first of all the captains and lieutenants need Ka-50 "Black Shark", Ka-52 "Alligator" and Ka-32-10AG instead of long and hopelessly obsolete Mi-8 and Mi-28!

I believe that Mi-28NM will finalize the reduction gears, due to which it fell, which will allow to remove the limitations on engine power. But for its combat capabilities, and even more so for maneuverability to hold out to the level of the "Black Shark", it will not be allowed by the rear tail tail bolt, especially since Ka-50 / 52 have long been flying on these engines, so all the praises to the "Night Hunter" "Such as" this is a fine helicopter "- from the LUKOW!

Additive in 400l.s. to the available 4400l.s. little increase its combat capabilities, as well as an increase in the range of fire-guided anti-tank missiles from 6km. up to 8km. Ka-52 by this time will work with the "Chrysanthemum" ATGM already with 20km, which corresponds to the requirements of modern war, meaning not obsolete tanks under Palmira, but regular troops with modern weapons, in which the range of air defense of tank groupings is much larger than Soviet tanks 40- years ago, but which surrounded us already from all sides!

By the way, the "legendary" Mi-28N and "NM" would not be bad to equip with ejection seats like Ka-50 / 52 helicopters, but let's take a look at the story of his loss to the Black Shark:

"In August 1986, the State Comparative Flight Tests of the V-80 and the Mi-28 were completed, the results of which showed that the Kamov machine is superior to the Milev's superior combat survivability, better performance characteristics and more extensive weapon capabilities. An important advantage of B-80 was its "unicity" (a circumstance that initially caused misunderstanding and even rejection, since all combat helicopters in the world were at least two-seater), because it saved the weight of the car, reduced the cost of training crews and possible losses on the battlefield, and the functions of the navigator-operator were successfully taken over by the automation of the laser-television sighting complex "Shkval-V" and ATGM "Whirlwind" (aviation: helicopters: ka-50 [Free encyclopedia ...].

The son of the famous designer I. Sikorsky, S.Sikorsky, flew to the Mi-28 series from the USA to Russia, which shows: how strong Ka-50 is and how much Mi-28 is unsuccessful. To my great regret, ex Minister of Defense S.Ivanov in fact was on the side of the American: he removed the Black Sharks from the arsenal and replaced them with losing and raw Mi-28N, and also weakly maneuverable in comparison with the "Black Shark".

What does it mean? For example, if necessary, the Ka-50 pilot is able to instantly deploy the Black Shark at 180grad at any speed. around the axis and meet the enemy in a more favorable position for him. The helicopter "Mi" in such a situation can perform only a turn, which entails the loss of precious time. Mi-28NM will not be able to jump out to the height of 1500. with vertical speed = 30m / s, as Ka-50 "Black Shark" did in Chechnya (From the story of the army pilot-test pilot Colonel A. Rudykh).

A halo of "legendary" helicopters from the KB MVZ creates liberal media even before the release of the series:

"The armed forces will receive a" helicopter of the future "to 2018 ... A fundamentally new modification of the Mi-28N attack helicopter (" Night Hunter ") is to arrive at the troops at the end of 2017 - the beginning of 2018. Tests of Mi-28NM have just begun, and it is already called the "helicopter of the future" and they say that the novelty significantly exceeds the famous and the most widespread in the world AH-64 Apache »(pоlitrussіа.соm> Armed forces)

At the international competition in India, "Night Hunter" lost to the American "Apache" in a clean and not least in armament, that's all his "legendary" in addition to the triple loss of the "Black Shark"!

And here is how the Mi helicopters are fighting in Syria: "x-true info" - "Combat helicopters and planes almost continuously swept over the enemies' heads and struck at them throughout the formed front. Dozens of terrorists were liquidated by missile-bomb ... ". "From a cannon - through sparrows!" (Proverb).

The fact that the planes "sweep over the heads of enemies" - I understand, but the helicopters in this case are designed to hang at a certain altitude and from there to work on terrorists aimed fire, and when they work on the battlefield in the airplane, the final result they are scanty: out of five thousand fighters who came from Iraq, only "Tens of terrorists" were destroyed. In Afghanistan, supersonic fighter-bombers for such work were nicknamed "SWISTS".

The Americans in such a time all in the science:

"... the helicopter is firing at either a very low speed, or even hanging. Moreover, the helicopter has a rather high altitude, not one hundred meters ... If the militants had large-caliber machine guns like DShK or anti-aircraft Zu-23-2, it is unlikely that Apache could afford such pleasure "(" Crocodiles "without" alligators »MIC).

The killer height of the fire of the antiaircraft guns Zu-23-2 to 1500., So the hovering height in this case is required above 1500m, which with the full combat load is clearly beyond the strength of the combat Mi-24 / 28, so they are "over the heads of the enemy", so and the efficiency of their work - worse than nowhere!

Now I'm fantasizing about the high-speed theme of Ka-22 rotorcraft, fly it "today". But in the beginning about the load-carrying capacity.

It is commonly believed that the popular Mi-6 helicopter has an average load of = 8. Constructively, Ka-22 was one and a half tons lighter at an equal maximum take-off weight of 42,5., Hence the average load at Ka-22 already then would be = 9,5. The D-25V engine has not been produced for a long time, and instead of it there would have been two TV7-117Vs with the total take-off power of 5600h.s, which, from the point of view of flight safety, is archived both for the Arctic and for the Army aviation. In this case, the weight of one engine D-25B = 1300kg, and two TV7-117B = 1600kg or 700kg. easier, i. four TV7-117 lighter than two D-25 on 1400kg and average load of Ka-22 would accordingly increase: 9,5т + 1,4т = 10,9т.

The total hourly fuel consumption for two D-25B = 2200kg / hour, for four TV7-117 = 1600kg, which is less by 600kg and the average load per flight hour would increase: 10,9t + 600kg. = 11,5T. Also, 600 should be added. due to the greater of 200l.s. the total power of the engines and, as a result, 12T is obtained. This (12T) could be today the average load of the Ka-22 rotorcraft by the most modest estimations.

As for the cruising speed of the "improved" Ka-22, it should be considered at least 340k / h. But the high-speed qualities of any aircraft are interesting in the Comparison, say with the Mi-26 helicopter: "Three hours of flight from Tiksi to Kotelny, most of it passed over the Arctic Ocean," said commander Mi-26 Alexei Pavlov. " (How the territory of Russia has grown by an island in the Laptev Sea.) Gazeta.ru.2014 / 10 / 11).

For Ka-22 at speed = 340k / h. It would take a whole time = 2h15min. Saving time = 45min, i.e. there and back - 1has.30min, for which the rotorcraft would save fuel 2400kg. and as a result - its useful loading would be increased by the same amount. That's what more cruising speed is needed for.

For obvious reasons, it is also needed for combat helicopters, but everything has a measure, so for cruising speed = 400km / hour, expensive complications in the design of the helicopter and primarily the propellers will be required. On Mi-24, such blades can not work, because he does not give out a speed more than 370-380 / h due to the long-outdated design of the classical scheme. And this speed can be obtained only at the maximum engine power and at the maximum set angles of the blades, which is far from cruising, when the features of the work of NV are studied. this mode.

Unfortunately, MVZ designers made a loophole cult of helicopter speed, with which they receive good money from the State, without even trying to launch their "breakthrough projects" (Mi-X1; PSV "Rachel") into their insolvency development, and their The "flying laboratory" is just a cosmetic upgrade of the half-century Mi-24 helicopter, where Colonel E.Poluyanov "reached" the speed = 405k / h, and then A.Boginsky himself: "The flying laboratory for the creation of a promising high-speed helicopter ( PSV) based on Mi-24 reached the speed of about 400 kilometers per hour, told reporters on Monday, the head of the holding company "Russian Helicopters" Andrey Boginsky "(vpk.name 19 June 2017).

Ka-22 has pulling screws for this speed and, in the course of flight, the power of the engines smoothly flows from the carrier screws to the pulling ones as the speed increases, while the lift of the wings increases with increasing speed, removing the load from the carrier screws!

Vitalii Belyaev.

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26.09.2017

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