In this month I've worked on my generator, it is composed of a brushless motor, a glow one and a diode bridge rectifier, as you can see in picture
It was able to generate at max throttle about 1.2 kW , starting the motor is difficult, I don't love glow engines (I only figured it now ahah) but the point is that my generator works and with some modifications to reduces vibrations can be mounted on a drone.
What I want to do now is to use a gas motor to generate the energy because glow engines consume a lot more fuel (I will be able to generate 1 kW/h with 0.30 L ).
I have also made a new frame to sustain a bigger cargo system (and the generator)
But I'm trying, the numbers are good 1kW is enough to sustain my configuration with 2KG of cargo weight.
Thank you for attention