40 years to the legendary Mi-24 combat helicopter (part of 3) Modification B

MI-24B

By the beginning of the development of the 9K113 "Shturm-V" supersonic anti-tank system in 1967, the Kolomna designers from KBM had a scientific and technical reserve in the class of supersonic missiles launched from tank guns - launchers, which they tried to make the most of. In 1970, KBM began to test the launch of a supersonic ATGM from a Mi-8 helicopter laboratory equipped with a prototype of a semi-automatic RCS, at the test range in Lar-tsevy Polyany. The full-scale development of the Shturm-V ATGM was started, having received in February 1972 an installation copy of the Mi-24A. In 1973, one of the Mi-24V prototypes was connected to the tests, equipped with a 9K113 complex with four 9M114 ATGMs on RP-2-149TK launchers. Pilots B. Savinov and Yu. Chapaev and navigator-operator V. Puganov took part in this work.

When launched at the same distance, the supersonic rocket consumes more fuel than its subsonic counterpart, which is associated with a significant increase in aerodynamic drag. Therefore, it was tried to reduce ^, reducing the diameter of the rocket body to the minimum, providing the optimal form of a cumulative warhead for a given armor penetration. For the 9М114 ATGM, they chose a two-stage layout with an accelerating solid propellant rocket motor with nozzles at an angle to the longitudinal axis, which ensure the rocket rotation at the start. Unlike the Phalanx in its various modifications, the 130-mm rocket 9М114 was compactly housed in a fiberglass container. Four arc-shaped feather-wings tightly adhered to the surface of the instrument compartment, two flat aerodynamic steering wheels were sunk into the slots of the steering compartment. The electric hub from the steering compartment to the instrument compartment was held in a heat-insulated tube through the central channel of the sustained solid propellant rocket motor. At the start, after the rocket emerged from the container, under the action of centrifugal force, the rudders and wings held a fixed working position. Further rotation of the rocket on the trajectory was provided by the shape of the wings.

Mi-24 In the first series

Mi-24V with the installation of the machine gun NSVT-12,7 "Rock"

Mi-24V late release

As a result of the painstaking work, the starting mass of the 9М114 supersonic rocket, with a maximum range of more than a quarter, was heavier than the 9М17П by just 10%. At the same time, the flight time of the “Sturm-Ma-B” on 4 km did not exceed 10,7 s, and on the old “Phalanx-PV” it had 24 s. Reducing flight time significantly reduced the time of enemy fire impact on the attacking helicopter. The appearance of the new complex allowed returning to the Mi-24В variant. He has an ATGM 9K113 "Sturm-V" with the guidance system "Raduga-Sh" provided the probability of hitting the target more than 92%.

On the Mi-24V, there were other innovations. For firing a machine gun in a fixed (zero) position and launching a NAR, the pilot set up a more sophisticated telescope ASP-17B. Additional fuel tanks were transferred from the cargo compartment to the wing pylons. State tests of the Mi-24В with the new ATGM system successfully ended on November 1975 at the Gorokhovetsky testing ground.

Already during operation, the insufficient effectiveness of the tail rotor was revealed. This was especially felt when maneuvering while hovering and having a certain wind speed. Sometimes it came to the point that the helicopter that started the rotation could not be “tamed” even with a full dacha. The way out was found quite simple: the screw was transferred from the starboard to the left, changing the direction of its rotation. The blades began to move toward the flow of air thrown by the rotor. This led to a decrease in the angles of installation of the blade and an increase in the margin to counter the negative influence of the wind on the efficiency of the tail rotor, which from the pushing one turned into a pulling one. They paid for this with a few big losses due to blowing the end beam with greater speed. After completion of the tail gearbox for changing the direction of rotation of the blades, the steering screw was again returned to its place as pushing.

The finished appearance of the Mi-24V acquired after entering service. By this time, the resource and reliability of the TVZ-117 engine had increased significantly. In 1977, ZMZ mastered the serial production of TVZ-117 3-series with resource 750 h and assigned resource 1500 h.

In the second half of the 1980-ies, after installing on the Mi-24В launchers APU-8 / 4-U the number of ATGM doubled. As noted above, the Achilles' heel of the Mi-24 was a rotor with a low efficiency factor. The use of a helicopter in the harsh conditions of Afghanistan required urgent measures to increase the static ceiling. On the engines TVZ-117 installed new electronic regulators. In addition, for a brief increase in power during takeoff and landing, a water injection system was introduced in front of the turbine. As a result, the static ceiling of the Mi-24D and Mi-24В in Afghanistan was succeeded in raising to 2,1 km.

Mi-24V Armed Forces of the Czech Republic

Mi-24V AF of Afghanistan

Mi-24V of the Armed Forces of Bulgaria

Mi-24V of the Armed Forces of Hungary

Mi-24V of the Armed Forces of Georgia

MI-24B Macedonia

Mi-24W Nigeria's Sun

Mi-24V of the Armed Forces of Poland

Mi-24V Armed Forces of Serbia

Mi-24B of the Armed Forces of Slovakia

Mi-24V of the Armed Forces of Ukraine

Mi-24B of the armed forces of Croatia

Mi-24W of Sri Lanka

Mi-xnumx in sierra leone

To be continued ...

Comments

[AlNikolaich]

Thank you so much for the series of articles about MI-24! Very good, interesting and tasty!

[Chicot 1]

I agree - the cycle is excellent! But ... Let (nevertheless) correct the author ...

The author's signature below the illustration below reads: "Mi-24V late release"...
In fact, this illustration does not depict Mi-24V of any issue, but the so-called. Mi-24KPV. One was a modification of the Mi-24V, which was converted for installation in the rear of the fuselage of a heavy machine gun. This was done taking into account the experience of military use in Afghanistan to protect the rear hemisphere ...
Due to the design features of the Mi-24 airframe, it was not possible to successfully place the machine gun. The shooter's cockpit turned out to be cramped, its placement is inconvenient. During takeoff and landing, the shooter suffered from severe dust ... Moreover, during a rough (emergency, forced) landing, he was one of the first (if not the very first!) Contenders from the crew to replenish the "cargo 200". For these reasons, the placement of a stern firing unit on Mi-24 helicopters was abandoned, and the Mi-24KPV did not go into production. If I'm not mistaken, it was released in a single copy ...
Due to the lack of fire cover from the tail section, the "Crocodiles" were fired on "in pursuit" much more often than the Mi-8, on which (on parts of the machines) stern firing installations were installed ...

[Bad_gr]

In Afghanistan, more than once I saw a side-shooter on the Mi-24 in the cargo compartment: the doors on the right side are open, and a man with a machine gun in the opening. In principle, if a helicopter from a combat approach goes up and a right turn, then a gunner could shoot at the place over which he had just flown. A machine gun in the stern, as it were, and nothing.
By mi-8.
I have never seen (1983-85g) he has a machine gun in the stern. But in the back, on the right side, he has a door.

[Bad_gr]

. "....... The way out was found quite simple: we moved the propeller from the starboard side to the left one, changing the direction of its rotation. The blades began to move towards the air flow thrown by the main rotor. This led to a decrease in the angles of the blade and an increase in the margin for parry the negative effect of the wind on the efficiency of the tail rotor, which turned from a pusher into a pulling one. For this they paid a little higher losses due to the blowing of the end beam at a higher speed. After the tail gear was modified to change the direction of rotation of the blades, the tail rotor was returned to its place as a pushing one. .... "

But this is not clear to me.
The rear propeller on the right side of the Mi-24 is found only on the very first models (on "glasses").
Then he was removed to the left side, so he stayed there. And judging by the shape of the rotor blades, we determine the direction of its rotation - in all the Mi-24 photos (with the exception of the very first ones, where it is on the right) - the rear screw is pulling.
If I am mistaken, give a link to a photo where this is not so.

By the way, on the Mi-8 the screw was originally the same on the right, but starting with the Mi-8md it was also transferred to the left side.

[igor67]

But I have not seen such a machine, that there was probably a transitional model on the "glass" and USPU24 and PN.

[Bad_gr]

Quote: igor67

But I haven’t seen such a car

Have you come across this?

[smprofi]

Quote: Bad_gr

A machine gun in the stern, as it were, and nothing.

it meant slamming a shooter with MANPADS or some other "hooligan" with DShK or KPVT

Quote: Bad_gr

By mi-8.

take a look here: http://steb.kiev.ua/?p=1191

[Bad_gr]

Quote: smprofi

Bad_gr
- A machine gun in the stern, as it were, and nothing.
smprofi
- it meant slamming a shooter with MANPADS or some other "bully" with DShK or KPVT

So I am about the same. The helicopter dives slightly during a combat approach, then makes a slide with a turn in some direction. If the machine gun is on the starboard side (and I saw it on the starboard side), then the shooter can work on the ground, just in the direction from where the helicopter just flew in (that is, back)

[igor67]

Just the cars came from Afghanistan to the ROMs painted eyes, and cards on the fuselages, aces of hearts

[igor67]

After the "aquarium" we went to 24, or product 246, Arsentiev, on the devices instead of the sheers there were "pads", it took longer to disassemble and remove the tidy, since it was necessary to unscrew the nuts m 4 a bunch, And from us truckers bought landing lights from turntables and put on KAMAZ, fought with amateurs not to turn off the high beam, the crosspiece from the transmission went to the Niva with a reinforced chassis, since all Afgan cars were repaired at our repair base, the mi24 kpv did not meet, indeed the cars came that received a stinger in the rear of the radio compartment, probably therefore on the mi6 behind in Afghanistan they put a TV camera in the tail boom.

[polly]

There were - ed. 240, ed. 242, ed. 244, ed. 246 ... And not "Arsenyevskie", but - Arsenievskie. There is such a city of Arseniev on the planet!

[igor67]

Horoshe Arsenievsk, the same product 245 and 243 exist and so what?

[polly]

Nothing. With what products I worked about those I know. And distorting the name of the city a second time, apparently, in disrespect ...

[igor67]

Worked with all the products, but the name of the city is not a cover, just out of ignorance

[avt]

Great photos Perhaps not even a continuation of the article, but a photo report to it.

[LaGlobal]

Thank you for the article! Very interestingly painted! The fact remains - OUR turntables are flying dragons that bring death worthless.

[Prapor Afonya]

Invincible crocodile! I hope he will have worthy descendants!

[Chicot 1]

Quote: Prapor Afonya

I hope he will have worthy descendants!

It would be more accurate to say "worthy successors"...

Mi-24V (if I'm not mistaken, in Afghanistan) ...

[Chicot 1]

Modification "B" is perhaps the most popular and famous of all modifications of "Crocodile" ...

Mi-24V. In the sky of Afghanistan ... (Illustration by A. Zhirnov)

[Strey]

Thank you for the article! Excellent turntable, more than once helped out. Thanks to those who invented and assembled this flying tank and the crews of this handsome ,, Crocodile ,,

[Nayhas]

In the second photo in the cockpit on the right is the first Soviet LCD monitor! And on its screen is the world's first Office!

[Avenger711]

If the machine does not pull well in any way, then who interfered with the propeller from a real flying Mi-8?

[homosum20]

I want to say many thanks to the author. I haven’t even read the text - such magnificent photos. I enjoyed it a lot. Thank.

[smirnov]

I’ve already read the third part with pleasure, thanks to the author, informative ... This is the question to those who know what kind of lever in the floor is on the right in the cockpit, is there really a parking brake? (In the photo in the second part)

[scarva]

This is the rotor brake, and a place for transportation to the AKS.

[ABV]

I really like the Mi-24, and yet-- see the airborne squad there ... well, then I woke up later, but on further modifications it could have been fixed ..