The present invention relates to an unmanned aerial vehicle (10) for spraying an agricultural field. The UAV has a liquid reservoir (20), a liquid spray gun (30), and a plurality of sets of rotor blades (40). The liquid spray gun has a spray axis extending away from the liquid spray gun. Each one of the plurality of sets of rotor blades is connected to a corresponding one of a plurality of drive shafts (50). A first drive shaft (51) of the plurality of drive shafts has a first drive axis extending longitudinally through the first drive shaft that is configured to be at a first angle to the spray axis. A second drive shaft (52) of the plurality of drive shafts has a second drive axis extending longitudinally through the second drive shaft that is configured to be at a second angle to the spray axis. The first drive axis and second drive axis are located in substantially the same first-second plane. The first angle extends away from the spray axis in a first direction and the second angle extends away from the spray axis in a second direction. The first direction is different to the second direction The liquid product ejected from the spray gun is at least partially entrained by a downwash of air from a first set of rotor blades connected to the first drive shaft and by a downwash of air from a second set of rotor blades connected to the second drive shaft.La présente invention concerne un véhicule aérien sans pilote (10) pour pulvériser un champ agricole. Le VASP comprend un réservoir de liquide (20), un pistolet de pulvérisation de liquide (30) et une pluralité d'ensembles de pales de rotor (40). Le pistolet de pulvérisation de liquide a un axe de pulvérisation s'étendant à distance du pistolet de pulvérisation de liquide. Chaque ensemble de la pluralité d'ensembles de pales de rotor est relié à un arbre correspondant d'une pluralité d'arbres d'entraînement (50). Un premier arbre d'entraînement (51) de la pluralité d'arbres d'entraînement a un premier axe d'entraîne
