Military Review

Such could be the French aircraft - C-450 Coleoptere

In the year 1954, in France, as part of the research of aircraft with vertical take-off and landing by two companies, BTZ and SNECMA, a joint project of an VTOL aircraft with a wing of the ring type was created under the name Coleoptere (ring-winged). The aircraft resembled the American X-13 project, which had a launching (landing) layout of a vertical-type fuselage, and the unconventional wing had all the possibilities for mounting chassis on it.

At that time, the designers working on the technology of creating an aircraft with an annular wing had the confidence that such an arrangement of the wing would allow a high-quality integration of the power plant into the wing of the aircraft for use as the outer contour of a jet engine. When using such a wing for airplanes with a subsonic speed, the resulting design will serve as the main channel for coaxial propellers. Almost all of the development of the time on the VTOL of the ring-type wing was based on projects captured in Germany, where work on these projects finally achieved some success.

Such could be the French aircraft - C-450 Coleoptere

The first experimental studies began with the construction of an unmanned flying SNECMA C.400 PI “Atar Volyan” stand. The stand was tested on a leash, experienced a vertical take-off and a vertical landing. The next was a stand called “C.400 Р2”, which, in addition to tether tests, was already tested in free flight. These tests were carried out by French engineers from 1955 for the next 3 years.

These tests made it possible to create an experimental aircraft with a wing of the ring type C-1958 Coleoptere by the year 450. In the same year, ground tests of the experimental aircraft began at the company's airfield in Milln Vilarosh, after which the tests of the aircraft in the air began. The first flights were carried out in the mode of take-off-landing. The first ascent to heaven with further free flight, took place 06.05.1959 of the year. Later flights begin with the transfer of the device to horizontal flight and vice versa. And after a month and a half there was a catastrophe.

25.06.1959 of the year when performing the next test flight test pilot A.Morel could not cope with the control of the C-450 Coleoptere, as a result of which the aircraft from a height of 75 meters entered the corkscrew and crashed, and the pilot barely managed to make bailouts at a height of approximately 20 meters, but upon landing, received serious damage (spinal injury). The investigation showed that the characteristics of this VTOL, namely the design of the wing of the ring type and the airflow control system, had nothing to do with the crash that occurred. However, SNECMA did not develop further use in the construction of ring-type wing airplanes, although it was already ready to create designs of combat vehicles — an assault fighter and a fighter jet interceptor. In addition, there were developments in civilian vertical take-off and landing vessels using TVD and coaxial screws.

Device and construction
The branded feature of the C-450 Coleoptere is the vertical positioning of the aircraft during take-off and landing and the use of a ring-type wing. The experimental aircraft had a 4 supporting chassis, the power plant - one turbojet engine. The construction of the airframe was made to order by the company "Nord". The all-metal fuselage is made with a slight elongation and a circular cross section at the place of its coupling with the wing. In the front of the cabin is made for one pilot, having a protruding lamp and side glazing, giving an improved view. Inside the cabin is a seat with a catapult "Sud SE.120B", which has an angle of inclination to 45 degrees during the ejection. Also the chair can be used on vertical modes of vletta-landing. The ring-type wing of the frame structure is made of light metal alloys with reinforcement of external and internal plating. The design of the wing did not use any mechanical parts. The main tail is made in the tail section on the outer and inner surface of the wing. Outer tail - 4-e triangular surface located cross. They are controlled by aerodynamic rudders that provide the aircraft with a horizontal flight. The inner tail is of the conjugate type with the outer tail, which has vitreous shaped surfaces connected to the body of the aircraft.

The aircraft has a non-retractable type 4-x landing gear. Racks made with the use of oil-air shock absorbers, got a good move and end with wheels of free rotation. Wheels have solid rubber tires.

Power - one turbojet mounted in the fuselage. Air flow control is carried out with the help of side air intakes of unregulated type and a nozzle with gas rudders. Compressed air emerging from the engine compressor passes through the channels of professional surfaces and reaches the nozzles of the jet control system. The system has aerodynamic rudders that control horizontal flight and gas-jet rudders that control the vertical flight of the aircraft. This system was successfully tested at the first stand and installed on the experimental aircraft “C-450 Coleoptere”.

For the transportation of the aircraft used special carts with a leaning ramp. When the aircraft was moved, it was installed in a horizontal position, and in order to take off, the ramp was fixed in an upright position.

Main characteristics;
- outer / inner wing diameter - 3.2 / 2.8 meters;
- wing chord - 3 meter;
- relative thickness of professional wing - 12 percent;
- engine - TRD 10IE "Atar";
- static thrust - 3.7 thousands of kgf.
- length 8 meters;
- speed 800 km / h;
- High-altitude ceiling - kilometer 3;
- weight of fuel 700 kilogram;

Information sources:

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  1. matex
    matex 23 June 2012 09: 23
    Hmm ... there was once a song by Elvis "Rocket Man", apparently someone from the French was inspired by this piece of art. Better to call this miracle Samalet-Kamikaze wassat
    1. Svistoplyaskov
      Svistoplyaskov 23 June 2012 09: 36
      A very interesting name for the engine: SNECMA C.400 PI “Atar Volyan”!
      Atar Volyan - Armenian? wink
      1. Hairy Siberian
        Hairy Siberian 23 June 2012 17: 33
        Quote: Whistling
        Atar Volyan - Armenian?

        Probably the Gascon!
        But seriously, Atar is the SNECMA engine family leading its pedigree from WWII aircraft engines inherited by the French after the 2nd World War.
        1. Hairy Siberian
          Hairy Siberian 23 June 2012 19: 38
          Quote: Hairy Siberian
          WWII engines

          I want to say: of course BMW (BMW - Bayerische Motoren Werke).
  2. kotdavin4i
    kotdavin4i 23 June 2012 09: 38
    They followed in the footsteps of the Germans, like the Americans, on the one hand, such an aircraft can take off from any flat site without a take-off run, therefore during the war there is no connection to airfields, which significantly increases the country's air force. On the other hand, it is difficult to control transitions from horizontal to vertical mode during take-off and landing, at that time there was no necessary electronics to control the device, and besides, the aircraft could not take a large payload without acceleration. Conclusion - a toy, played and closed the topic.
  3. Krilion
    Krilion 23 June 2012 12: 11
    the plane’s designer clearly confused the truffles with some other mushrooms ....
  4. welesson
    welesson 23 June 2012 12: 26
    The only serious problem is the landing method. And so the solution can be interesting. .. Like a small aircraft carrier, you can launch with the help of catapults, you can individual, like on an assembly line - it means you can take the load, the electronics has grown ... But why? When it is better to buy Mistral, rollback is more.
    1. Hairy Siberian
      Hairy Siberian 23 June 2012 17: 28
      Quote: welesson
      The only serious problem is the landing method.

      In this case, you can land using a parachute.
    2. luiswoo
      luiswoo 23 June 2012 22: 14
      Poor handling, high fuel consumption, very modest speed and it’s not obvious where to install weapons, a gun is more or less clear, and missiles and bombs, there are enough problems without take-off / landing.
  5. Lexx
    Lexx 23 June 2012 13: 22
    Like the pepelats from Kin-dza-dza laughing
  6. mr.Man
    mr.Man 23 June 2012 13: 47
    A good selection of photos pepelatsev:
    1. APASUS
      APASUS 23 June 2012 13: 54
      Quote: mr.Man
      A good selection of photos pepelatsev:

      It turns out that not only the French issued flying stools ........
  7. Sanches
    Sanches 23 June 2012 14: 01
    The designers went the other way - they simply change the direction of traction without any extra frills
  8. Bad_gr
    Bad_gr 23 June 2012 20: 08
    Unusually looking aircraft.
    atov / scoreid / 1137 /

    Aircraft with vertical / short take-off and landing.
    atov-prodolzhenie / scoreid / 1137 /
    1. Sehiru san
      Sehiru san 23 June 2012 20: 47
      Thanks for the links. Now I would have to find more descriptions. wink
      1. Bad_gr
        Bad_gr 23 June 2012 21: 33
        Quote: Sehiru San
        Thanks for the links. Now I would have to find more descriptions.

        Google has a picture search.
  9. Simon
    Simon 23 June 2012 21: 57
    Interesting design. And did we have anything like that? request
    1. Kibb
      Kibb 24 June 2012 18: 23
      Yes, it was, the only thing I don’t understand is how the designers came to two engines, the Yak 141 is a very good plane, but why drag an extra engine on yourself
    2. Sanches
      Sanches 24 June 2012 19: 11
      yes, development has been going on since the 50s

      Yak-36 - Soviet carrier-based attack aircraft, the prototype of the first in the USSR production aircraft vertical takeoff and landing of the Yak-38
  10. mind1954
    mind1954 24 June 2012 03: 20
    But what about! And Garnayev flew on a similar thing!
    Many times showed documentary footage!
    In the early 60s, who just did not do this!

    But on the Taunden ring - it's cool!
    1. Kibb
      Kibb 24 June 2012 18: 25
      Quote: mind1954
      But on the Taunden ring - it's cool!

      Yes, I wouldn’t even notice = really Taunden’s ring
  11. jiquetses
    jiquetses 19 December 2012 13: 09
    [size = 15] In some foreign countries, special exceptions were made in the regulation of interrogation of police agents in court: in Germany they are interrogated in the absence of other participants in the process by a specially authorized judge with the subsequent announcement of the protocol at the hearing, and in Colombia there is a double security insurance: the identity of not only the agent, but also of the judge who interrogates him, is classified. In the United States, in some cases, police officers may be interrogated about information received from informants. [/ Size]
    Thank you for choosing the Forex forum as your place of communication! MobileNavigator.part1.rar 1,91MB Number of downloads: 2608
    Mich el e AA, Krueger TI Surgery, 1956,39,2,277-284. Your favorite car won't start? Does the engine make suspicious sounds during operation?
    The course of romance (realism, postmodernism). the calculated values ​​of the coefficient of lateral thrust as the values ​​of the variation series, according to the statistical characteristics of which the arithmetic mean value and the mean square deviation of the coefficient of lateral thrust are calculated according to the formulas :(