MAY-21 Observer

MAY-21 Observer is small tactical unmanned aerial vehicle (UAV) with vertical take off and landing (VTOL) capabilities. Its structure is made of advanced composite materials, such as CFRP-carbon reinforced polymer matrix composites. We also use additive manufacturing process to produce some components for the UAV. It has 4 electric motors for vertical take off and landing. For cruise flight it has IC engine, it increases flight duration. All systems are controlled by advanced flight controller.

Following systems and capabilities are integrated in one unmanned aerial vehicle:

  • VTOL
  • Hybrid energy system
  • Safe flight termination system
  • Low Drag Design
  • Triple redundant system

UAV has 3 flight modes.

  • Fully autonomous
  • Semi-autonomous
  • Controlled by pilot

General characteristics

  • Crew: 0 Remote: 1
  • Capacity: 8 kg
  • Length: 2 m
  • Wingspan: 4 m
  • Height: 70 cm
  • Empty weight: 27 kg
  • Gross weight: 35 kg
  • Powerplant: 4 x Electric motors, IC 3hp Wankel Engine (Electric motor for fully electric version)


  • Maximum speed:  200 km/h
  • Cruise speed: 120 km/h
  • Range: 100 km (more then 100km is optional)
  • Endurance: up to 24 hrs (up to 8 hours for fully electric version)
  • Service ceiling: up to 8000m

Designed For:

  • Long duration aerial live monitoring during day and night
  • Delivery of high importance payload

Areas of Use:

  • Environment management, protection
    • Wildfire prevention
    • Illegal logging monitoring, prevention
    • Poaching monitoring, prevention
    • Scientific data acquisition
  • Crisis Management
    • Emergency response management
    • First aid delivery
  • Medicine
    • Delivery of biological samples
    • Delivery of human organs for transplantation
  • Energy Industry
    • Monitoring of infrastructure
  • Defense