The Parseval-Sigsfeld kite balloon (German: Parseval-Sigsfeld Drachenballon) was a type of non-rigid military observation balloon, designed in 1898 by August von Parseval and Hans Bartsch von Sigsfeld [de].
Its aerodynamic shape and the rear air capsule ensured a stable position owing to the force of the wind, similar to the way in which kites are stabilized; for this reason it was known as the kite balloon (German: Drachenballon).
This aircraft was widely used as the main observation balloon type by the Central Powers during World War I. German airship factory owner, August von Parseval, and German military officer, Hans Bartsch von Sigsfeld,[1] had been experimenting with different balloon shapes since 1893, previously using spherical shapes that had proved to be unstable in windy weather.
In the rear part of the envelope was a stabilizer with a characteristic phallic shape, which was filled with air under wind pressure.
The positive flight characteristics of the Parseval-Sigsfeld kite balloon led the high command of the Imperial German Army to apply this balloon design for military service, as implemented by the Austro-Hungarian Army.