Helicopter Cierva CR Twin. Specifications. A photo.
Helicopter Cierva CR Twin. Specifications. A photo.

Helicopter Cierva CR Twin. Specifications. A photo.


Cierva CR Twin - British multi-purpose helicopter, developed and designed by aircraft manufacturers «Cierva Autogyro Company» and «Rotorcraft Ltd.» in 1969 year.


Cierva CR Twin photo


The design of the Cierva CR Twin was started by British aircraft builders in the middle of the 60-ies of the last century. Contrary to earlier products, engineers and designers decided to design a modern and in-demand multipurpose helicopter capable of being used for transporting people, for transporting goods, for conducting observation flights and patrolling the terrain. Despite the fact that initially the helicopter was planned exclusively for civil aviation, at the final stage of design, experts claimed that this aircraft can also actively prove itself in the military aviation sphere, especially since it was reflected in the functional aircraft.

Helicopter Cierva CR Twin has the elongated shape of its fuselage, but despite this fact, the aircraft dimensions are extremely compact, which provides an aircraft on a par with high-speed travel, and a very high rate of maneuverability that does is important for aircraft of this class.

For the first time in the air flying machine model Cierva CR Twin rose in August 1969 years, however, the test was a failure, as the experts have identified problems with the stabilization of the aircraft, which is very much complicated the landing process. In 1970 year was presented the second prototype of the aircraft, which turned out to have much better, however, and he had a number of shortcomings that have been eliminated in the third version of the prototype.


Photo Cierva CR Twin


In 1973, the helicopter project Cierva CR Twin been prepared for mass production, however, due to lack of orders from both the representatives of the civil aviation sector, and from the military command, 1975 project was officially closed.

The cockpit of the Cierva CR Twin helicopter is designed to take on board up to 5 people, which provides the aircraft with the opportunity to be used in the commercial sector, however, the protracted development of the aircraft led to an inevitable price increase that did not satisfy potential customers. Among other things, in the cockpit of the aircraft of the Cierva CR Twin model, it is also possible to carry out the transportation of small loads, provided that the total weight of the transported cargo does not exceed 450 kilograms, and its dimensions will ensure placement in the cabin.

The power plant helicopter Cierva CR Twin piston aircraft engines equipped with two brand Continental IO-360, each of which is capable of traction in 135 hp, which was enough to be carried aboard 5 people, including one pilot, or for transporting payload a total weight of up to 450 kg. Helicopter Cierva CR Twin can accelerate up to speed in 210 km \ h., And to overcome the distance to 805 kilometers.


Helicopter Cierva CR Twin


Ever-produced and planned variants of the Cierva CR Twin model include the following:

  • Cierva CR Twin - A prototype of the aircraft;
  • Cierva CR.420 - Draft version of the helicopter to be equipped with two engines of the brand Continental TSIO-360-A;
  • Cierva CR.640 - Draft version of the aircraft to be equipped with two piston aircraft engines of the brand Continental Tiara T6-320.


Specifications Cierva CR Twin.


  • Crew: 1 people;
  • Capacity: 4 person;
  • helicopter length: 8,55 m .;
  • The height of the helicopter: 3,02 m .;
  • The diameter of the rotor: 10,06 m .;
  • Weight of empty helicopter: 850 kg. (Depending on version);
  • Maximum takeoff weight: 1440 kg. (Depending on version);
  • Cruising speed: 195 km \ h. (Depending on version);
  • Maximum flight speed: 210 km \ h. (Depending on version);
  • Maximum flight distance: 805 km .;
  • Maximum flight height: 6120 m .;
  • Powerplant: 2 × Continental IO-360 (depending on version);
  • Power: 2 × 135 hp (Depending on modification).



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