Buckle (aviation)

See also: Loop

The buckles (or loop ) is a figure of Aerobatics. It is a rotation of the Avion or Hélicoptère around its axis of pitching (axis of the wings). Thus, the aircraft bucks, passes on the back then goes down again. The loop constitutes with the barrel one of the two basic figures of the traditional stunt-flying.

So that a loop is successful, the pilot must describe a perfect circle and does not have to deviate of its axis. The entry and the exit of the figure must be done with the same altitude.

The compensation of the offset by the wind is one of the major difficulties of this figure. At the top of the trajectory, the apparatus is in ballistic flight (0g). At the time of the two resources, at the beginning and the end of the figure, the load factor is from 3 to 3,5 G.

The first loop was carried out in 1913. Sources divergent on the identity of the first pilot who carried out this figure. It would seem that French Adolphe Pégoud on August 31st, 1913 with Buc was the first pilot to make a success of this figure with the orders of a Blériot. However, according to other sources, this honor échoirait with the Russian Pyotr Nesterov on August 27th, 1913 controlling a Nieuport.

The loop adapted to the Russian mountains

In the world of open or fixed attractions, the term loop is employed to indicate, on the course of a horse-gear of the type Russian Montagnes, a loop proposing a complete inversion in the vertical axis. The passengers thus find temporarily the upside down.

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