I'm a agricultural engineering student and complete newbie trying to build a simple mechanism attached to a drone that dispenses a grease-type fluid. However, since I'm not familiar with the field, I'm having a hard time googling because I don't know the correct terms to search for.
I'm looking for a mechanism that will remotely push the grease out. The problem is carrying the necessary weight for an hectare (300g to 1,5kg of fluid) and the dispenser mechanism within the drone. So I'm looking for a lightweight dispenser mechanism capable of deliver small amounts of this fluid (3g) distributed on the trees canopy. The grease do not need to be heated as it flows naturally in normal temperatures (like a toothpaste). Both pump or syringe-type arrangement would be fine as long as I can control it remotely.