Por U R ANTUNIASSI1, R G CHECHETTO, A A B MOTA, F K CARVALHO, I F BORGES, J F MAGGIONI e P I T SILVA

This work aimed to determine deposition uniformity, swath width and drift of two drone models at two flight heights. Drift was evaluated up to 64 m downwind. The effective swath width was measured using a string spectrophotometer. Deposition uniformity evaluation used a 60-point matrix of mylar cards. Drift and deposition were measured by spectrophotometry of target washing solutions. The drone models DJI MG-1P (10 kg payload) and DJI T-16 (16 kg payload) were equipped with AIXR 110015 nozzles producing medium to coarse droplets and calibrated to 10 L ha-1. The results showed that both drones spraying with overlapped swaths and with a 5-m swath width offered Coefficient of Variation (CV) like standard agricultural aircrafts. If spraying without overlapping the swaths both generated high deposition variability. In all applications some amount of drift was found on the last collector (64 m). Flight height was the most important factor affecting drift.

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