The PATTERNATOR – Improving Spray Pattern Uniformity in Crosswinds 

by

Gordon McDermit

Contact:  Gordon McDermit  email:  mcdeg@sasktel.net

Summary:

Pattern uniformity is one of the most important factors in the efficacy of aerially applied sprays.  Data collected during calibration clinics have shown significant pattern distortion resulting from spraying with crosswinds.  This has lead to considerable time and effort spent researching methods and developing equipment to overcome this phenomenon.  The resulting technology, the PATTERNATOR, controls individual spray nozzles as a means of compensating for the crosswind pattern distortion effect.  The major challenge is optimizing the locations of controlled nozzles.  Substantial independent pattern testing will be confirmed with additional testing done in cooperation with the USDA-ARS Aerial Application Team in College Station, TX.   Nozzle locations resulting in significant pattern uniformity increases have been determined for various aircraft, but further testing may indicate potential for even greater improvements.  This presentation will discuss, in detail, the operation principles of and the potential pattern improvements resulting from use of the PATTERNATOR.

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