Accession Number : ADA194110

Title :   Field Procedure for Measurement of Flightline Offset in Forestry Spraying (Procede sur le Terrain pour Mesurer la Distance de Decentrement de la Ligne de vol dans une Operation d'Epandage des Forets).

Descriptive Note : Final rept.,

Corporate Author : NATIONAL AERONAUTICAL ESTABLISHMENT OTTAWA (ONTARIO)

Personal Author(s) : Crabbe, R S ; McCooeye, M

PDF Url : ADA194110

Report Date : Mar 1988

Pagination or Media Count : 24

Abstract : Among results from different field experiments on target deposition and off-target windborne droplet drift in aerial forest sprays, there can be disagreement due chiefly to: 1) differences in target stand characteristics which influence their droplet interception efficiencies, including mean wind speed profiles above the forest, nature and density of the stand and average size and orientation of foliage elements; b) differences in the mean and turbulent structure of the temperature, humidity and vector wind fields both in the canopy flow and in the atmospheric surface layer flow above the stand, all of which influence the sink velocity and decay rate of the aircraft vortex wake containing the ultra-low-volume (ULV) spray emission (thereby determining the effective spray release height) as well as the turbulent deposition velocity of the droplets.

Descriptors :   *FORESTS, *SPRAYS, *VECTOR ANALYSIS, *FLIGHT PATHS, AIRBORNE, AIRCRAFT, CANADA, DEPOSITION, EFFICIENCY, EMISSION, FIELD TESTS, FLOW, FOLIAGE, FORESTRY, HEIGHT, HUMIDITY, INTERCEPTION, MEAN, MEASUREMENT, ORIENTATION(DIRECTION), PROFILES, RELEASE, TARGETS, TURBULENCE, TURBULENT FLOW, VORTICES, WAKE, WIND, WIND VELOCITY, AERIAL DELIVERY, APPROACH, TREE CANOPY, PESTICIDES

Subject Categories : Commercial and General Aviation
      Fluid Mechanics
      Numerical Mathematics

Distribution Statement : APPROVED FOR PUBLIC RELEASE