Measuring Position Error
For the purpose of complying with an aircraft design standard that specifies a maximum permissible error in the airspeed indicating system it is necessary to measure the position error in a representative aircraft. There are many different methods for measuring position error. Some of the more common methods are:
- use of a GNSS receiver while flying a triangular course
- trailing conduit with static source, stabilized by a plastic cone
- tower fly-by with photographs of the passing aircraft taken from the tower to accurately show the height of the aircraft above or below the tower
- trailing bomb with both Pitot and static sources
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