Russian volunteers From St. Petersburg have created 2 fixed wing kamikaze drones, Privet-82 and Privet-120.
Privet-82: 82mm mortar warhead, electric motor
Privet-120: 120mm mortar warhead, gasoline engine
Both have 30km range
I didn't watch the video till now, I thought they were drones designed to be launched by mortars... 82mm and 120mm respectively, but it is clear from the video that these drones are not designed to fit down 82mm and 120mm mortar tubes.
I guess they just use the mortar bombs as warheads, which is interesting, but not as clever as a mortar fired drone.
The 4-6kg capacity of an 82mm mortar bomb would be limiting in terms of cameras and guidance etc, but a 120mm mortar bomb is 16kgs and has rather more space and potential.
I would think rather than using mortar bombs as the warhead of a suicide drone that the 40mm under barrel grenade launcher could be redesigned to be mounted along the underside of a drone and special grenades could be made that essentially have a tiny propellent because they don't need to be blown 400m down range to a target, they just need a small propellent boost clear of the drone and launched straight down at the target with a much bigger HE payload because they would be just falling down on the target anyway, and being anti personnel grenades they would be good launched directly down at troops in trenches or troops in vehicles with open hatches.
they have a 6 round grenade launcher which is just a revolver with 6 launch tubes that rotate around to fire... this launcher could be a simple grid of 3 by about 8 or 10 launchers for 24 to 30 grenades that could be launched in series or rapid fire to deluge the ground below with fragments very quickly and easily with no chance for the targets on the ground to realise they are even under attack.
They already have air burst grenades that bound up into the air before the main charge explodes at 1.5 to 2m altitude making them rather more deadly, but if the enemy troops are already lying down then impact grenades would be just fine.
Perhaps the first few fired could be air burst and the rest impact grenade to get them on the ground.
The grenades are already designed to cause casualties and are already in mass production and would be quick and easy to load... and the launcher only needs a firing pin to launch the grenades.