well , I don't get the point of having this kind of lunch system .... unless the engine can't produce enough power then there is no point of mounting uav on a pickup .... after all those pickup need some run away as well !!!
Its pretty obvious that the drones in question dont use wheeled undercarriages,this is a deliberate design choice that was made to save on weight and space,both of which are at a premium in drones like this.In addition the vehicle also allows the drones to reach a far higher take off speed with a much heavier payload than they could ever reach under their own power if they had a conventional wheeled undercarriage.The only other choice for drones of this type would either be some sort of large gas/pneumatic powered catapult type launcher which would likely be fairly large and would also require having the aircraft placed on it prior to launch as well as the aircraft itself being capable of standing up to the stresses of a catapult assisted take off,or it would need some sort of rocket boosted zero length take off system,which would also require some sort of launcher plus a jettisonable booster/boosters and an aircraft that could also handle the stresses of the launch.
The beauty of using this launch system is its very simplicity,its just a converted 4x4 so you can build and deploy a lot of these very,very cheaply as opposed to something purpose built like a catapult,it also enables you to put a lot of drones in the air very quickly,you also arent just limited to a runway,you can use a paved road,hell under the right circumstances you could probably even use an unpaved road or even a flat piece of ground if really had to,it is a 4x4 after all.
Personally I think its damn clever,not to mention that as far as I can tell iran is the first to launch drones of this size from vehicles.
If you`re wondering heres what a gas/pneumatic catapult type launcher looks like,not exactly compact is it?
Heres a vid of an rq-7 launch using a pneumatic catapult.The rq-7 is smaller and lighter than the iranian drones.
And heres a zero length drone launch in action
