Tow cone
The tow cone is used to calibrate the static pressure- based measuring instruments of an aircraft .
The drag cone provides the steady static pressure of the surrounding earth's atmosphere as a reference pressure . This is done by pulling the tow cone behind the aircraft during the calibration flight. The distance to the aircraft must be sufficiently large so that the surrounding air can be described as almost undisturbed by the actual aircraft.
functionality
The tow cone consists of the main components cone and hose. The static pressure above the hose is used as a reference for the measurement. The cone is mainly used for stabilization and as an aerodynamic resistance to pull the hose out of the aircraft.
literature
- Edward N. Brown: Position Error Calibration of a Pressure Survey Aircraft Using a Trailing Cone , NCAR Technical Note 313, July 1988, available online (PDF; 1.0 MB)
Web links
- (Jim Bede; Bede Aircraft inc., Cleveland, Ohio :) Calibration of Airspeed Static Source Application of the tow cone, sketch. In: Bede Design No. 27, undated, accessed September 12, 2017 - English.
- (Jim Bede; Bede Aircraft inc., Cleveland, Ohio :) Trailing Cone Static Source Dimensional drawing of a towing cone , comment. In: Bede Design No. 28, undated, January 1971 or later, accessed September 12, 2017 - English.
