QDR (aviation)

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Drawing of a QDR

The term QDR comes from radio navigation and, in aviation, indicates the magnetic bearing from a ground transmitter to an aircraft . Like QDM, as a short name for a certain direction from the times of the Morse code, QDR belongs to the so-called Q key , which is still used in aviation today, and is not an abbreviation. However, Question: Direction Radial can serve as a donkey bridge . Unlike the QDM, however, the QDR is rarely used.

QDM = MH + RB

The QDR is the reverse of the QDM; H.:

QDR = QDM +/- 180 °

Exemplary calculation of the QDR:

Given: MH 220 °, RB 040 °

Wanted: QDM, QDR

Solution:

QDM = 220 ° + 040 ° = 260 °
QDR = 260 ° + 180 ° = 440 ° - 360 ° = 080 ° or shortened
QDR = 260 ° - 180 ° = 080 °

See also

literature

  • Peter Dogan: The instrument flight training manual as developed by Professional Instrument Courses, Inc. Aviation Book Co., Seattle WA 1999, ISBN 0-916413-26-8 .
  • Wolfgang Kühr: The private pilot . Volume 4, A: Air Navigation . 2nd improved edition. Verlag Friedrich Schiffmann, Bergisch Gladbach 1979, ISBN 3-921270-05-7 .
  • Jürgen Mies: Funknavigation , Motorbuch Verlag, Stuttgart 1995, ISBN 3-613-01648-6 , ( private pilot library 3).
  • Jeppesen Sanderson (Ed.): Private pilot FAA practical test study guide. Airplane single-engine land . Jeppesen Sanderson, Englewood Col. 2000, ISBN 0-88487-265-3 .
  • Jeppesen Sanderson (Ed.): Private Pilot Manual . Jeppesen Sanderson, Englewood Col. 2001, ISBN 0-88487-238-6 .
  • Walter Air - CVFR textbook Mariensiel 2001.