Hi Giulia,
Currently, drones are not used in the actual lighting of fires; if used, it would be in the monitoring of and overall management of the cultural burning processes.
To learn more about cultural burning practices, and the methods used in both lighting and managing the fires, I’d head to google – there are several example orgs working across North Queensland and the Northern Territory. Drones are being used by numerous organisations doing this work, so this would be a great area to focus your investigations in determining drone models etc.
I’d recommend you have a read of this response to a similar question as well – https://ewbchallenge.org/forums/topic/7-1-fire-management-drones/
Cheers,
Luke