unmanned aircraft zala 421-08m at the international aviation and space salon maks-2021 in zhukovsky, russia

2021unmanned 42108m aerial air aircraft airfield aviation controlled defense deserted detection drone duration engineering exhibit exhibition flight industry international july light long maks maks2021 monitoring moscow multifunctional one patrol patrolling photography radio reconnaissance region remotely russia salon scout silent sized small space surveillance target technology transport uav universal unmanned vehicle zala zhukovsky