future helicopter
Author's articles
New design engineering solutions for helicopters in Russia?

New design engineering solutions for helicopters in Russia?

When I read about regular advances from the ministry's designers a cost center, the amounts at Nira rubles in the amount of - billions, it always comes to mind is the monologue of a young Gennady Khazanov:

"What people are stealing money train!

And do not dream in a dream!

Once I had a dream, then I didn’t sleep for three nights. ”

And reassurance: “Russia is developing a new high-speed helicopter. According to the Deputy Prime Minister for the military-industrial complex Dmitry Rogozin, the production of a real machine can be discussed after conducting research and development (R & D), which must be carried out no later than 2016 of the year.

The Ministry of Industry and Trade in the tender specifies an even more stringent deadline for the completion of R & D - 2015 year.

And "19 January 2016. Deputy Minister of Industry and Trade of the Russian Federation, Yuri Slusar, said that Russia plans to allocate about 7,5 billion rubles from the state budget, which will be used to develop a promising high-speed helicopter. ”

So much for the "hard deadline for research - 2015 year" !?

And further: "There are new design engineering solutions that will enable this machine to move faster and more maneuverable. This is a promising task, which is already working on Alexander Mikheev (took over as director of the company "Helicopters of Russia" in September 2013 years) - said "Izvestia" Dmitry Rogozin.
… The engine is being tested for a promising high-speed helicopter. ”
(News. 3 February 2014).

Needless to say, Mr. A.Mikheev is a highly educated man, but it is not clear: what kind of “new engineering engineering solutions” for a helicopter, especially for a speed helicopter, can be issued by the candidate of economic sciences, which A.Mikheyev is.

I wonder: and in what time frame fit our ancestors? After all, there was no high-power high-speed computers, purge the system at TsAGI were much more modest today, but for its technical excellence same rotorcraft Ka-22, excluding electronics, perfect Mi-38, which was built 30 years and planned its serial production this year. And how long was built Ka-22, because at that time it was a revolutionary aircraft?

"According to updated in 1956, the requirements rotorcraft with engines of TV 2VK takeoff power on 5900 hp I had to carry up to 60 Marines with weapons. ... In this case, the maximum speed at a height of 4500 m should be within 400- 450 km / h, and the ceiling - 6500 m.

In 1957, the first glider Ka-22 transferred to static tests in TsAGI, and in the autumn of the following year the first flying machine Ka-22V ( "A" item), built at the plant number 938, entered the flight test station

... The reason for the installation of new theater is the low dynamic stability TV 2V and implementation of D-25V into production for the Mi-6 ». (Soviet rotorcraft Ka-22. 29-12-2010).

It should be noted that the installation of D-25VK total capacity was almost 800 hp less than TV 2VK led to a dramatic reduction of the payload weight and the take-off. "

In the characteristics of the Ka-22 we read: Vcr = 270k / h; Vmah. = 350 / h

What is the time for helicopter speed 270k / h. with trapezoidal blades:

21 November 1959goda Mi-6 helicopter was an absolute world speed record 262k / h, previously owned by the United States. Cruising speed Mi-6 the time = 200k / h. Then he went into a series of metal blades are rectangular in shape, with which high-speed characteristics of the helicopter grew 50k / h, ie, Vcr. = 250k / h.
Such blades A-6 were ready for Ka-22, so the cruising speed would be = 320k / h and Vmah. = 400k / hr., Even on weaker engines D-25V but rotorcraft has been discontinued.

I try to imagine: what could be today a rotorcraft, race against time for several decades

Modern helicopter engines N = 6000l.s. not in Russia, but there TV7-117V Motors (IM) with a maximum take-off power in 3000l.s, so the two-engine TV7 117V (VM) with a total capacity = 6000l.s. with great success replace a TV 2VK.

Wherein:

  • 1. By 4-x engine to improve safety, it is very important to work in the Arctic, the Arctic, the North, etc.

  • 2. The total weight of modern x-4 TV7-117V (BM) is less than 2 x-old D-25V on 1100kg.

  • 3. The hourly fuel consumption of the two engines D-25B = 2400kg, while in 4-x TV7-117В (VM) = 1800kg, i.e. savings = 600kg per hour.

  • 4. Instead, single pull screws D = 5,9m - modern coaxial zakapotirovannye propfans that are smaller in size with equal traction and safe for ground crews and passengers.

  • 5. Aircraft control removed, bearing propeller control left, like B-12. There is no flap on the wings either, there are small ailerons at the ends of the wings to assist the rotors at high cruising speeds, since at these speeds, a substantial lift force is given out by the wings, facilitating the rotors, with a significant proportion of the power spilling over to the pulling screws, therefore, at high speed, the efficiency of the rotor control is worse. The ailerons deviate synchronously with the control of rotors from the beginning to the end of the flight, the result of which is insignificant at low speeds, but effective at high speed.

Why ailerons at the end of the wing? - In the center of the rotor will be minimal shading from them the air flow in the hover when the rotor of the required maximum thrust.

In Ka-22 chassis is made with a very high drag, so in today's rotary-wing Chassis - retractable, which also have a positive impact on the cruising speed and therefore do not see any reason to spend millirdnye amount to Nira, when the question with a cruising speed of 360k / h solved our genius designer of Kamov helicopters Nikolai Ilyich half a century ago! And his disciple, outstanding designer Sergey Viktorovich Mikheyev today with this task successfully cope!

The money, in the amount of 7,5mlrd who regularly stand designers to cost centers "Nira" and R & D ", highlight the company" Kamov "on real projects of high-speed helicopter Ka-92 and Ka-102, which in the near future will bring real benefits to our State!

If the firm "Kamov" financed by the state is similar to the cost center designers, our pilots would have long since mastered the Arctic on modern rotary-wing types Ka-22 with much greater economic benefit and safety than on the expensive Mi-26 with the long-obsolete very dangerous tail rotor.

Example: "In Peru killed 20-year-old student at the time of the visit of Prime Minister Pedro Kateriano in one of the cities in the country. Lina Zapata Fahey girl broke the helicopter, in order to transmit the prime minister a letter asking to be released from the prison of her brother, who has been unjustly convicted. However, when she passed the helicopter, did not see the tail rotor works. The blade cut off in an instant the girl's head. " (Tvzvezda. 2015 / 08 / 09)

Such sad examples are many, many failures in the tail rotor helicopter in flight with a tragic outcome and gene. Designer MVZ AG Samusenko them well informed, but with maniacal persistence continues to impose on our aircraft tailed helicopters.

And further. I read everything on the Internet that could be read about Ka-22 and I had a big doubt that the catastrophes were caused by the design flaw. And that's why:

At firstPilots CB "Kamov" tested them with supercritical congestion on speed and flight weights, setting world records and no abnormalities in the Ka-22 was not, and the disaster occurred during cruise modes with minimum takeoff weight.

SecondlyIn Soviet times, in general aviation maintenance differed high culture and quality, and the more experimental techniques, which is not on the ferry experimental Ka-22:

“According to the navigator's rotorcraft Ka-22М 01-01, it flew off in 3 hours 57 minutes, but soon returned due to a malfunction (oil leaked from under the tightly closed cork of the left gearbox) and landed in 4 hours 10 minutes. In 4 hours 55 minutes a second take-off took place and an hour later - landing in Turkestan. There was already a rotary wing 01-03 Garnaev, who had smoke in the cockpit before landing. During the inspection, a loosening of the nut of the left support of the synchronization shaft was found. Inspected and refilled the car 01-01. According to the mechanic Yu. T. Denisov's explanation, the play of the slotted-hinge of the left swashplate was discovered and eliminated here. ”

What happens when oil leaks - jamming followed by a catastrophe and for such under-rotations and under-dots an ordinary aircraft technician in Aeroflot could go on trial, so I don’t believe that booster rotors were serviced so carelessly and when this number failed - they repeated the defect in the rotor control!

Vitaly Belyaev for Avia.pro

.
upstairs