Stalker UAS: Intelligent Unmanned Aerial Systems

Stalker is an operationally proven small, silent, Group 2 Unmanned Aerial System (UAS) that provides unprecedented long-endurance imaging capability in a variety of contested environments and is in use by Special Forces around the world.

Designed to combine the flexibility of a portable system with the endurance and payload performance of a larger, more costly vehicle, Stalker VXE and XE’s class-leading endurance, broad operating envelope, and open system architecture allow it to execute diverse and demanding missions while maintaining a small operational footprint and crew requirement.

Power & Fuel

Optionally powered by a ruggedized Solid Oxide Fuel Cell, Stalker uses propane to achieve 8+ hours of operation.

To support the needs of the mission, the system can also be easily reconfigured in the field to a battery powered option that provides 4 hours of endurance.


The Stalker VXE Block 30 system was upgraded with a next generation vertical take-off and landing capability to provide users with greater mission flexibility for operations in austere locations around the world.

The Stalker XE Block 25 system can be hand launched from bungee or rail options. 


The custom droppable payload compartment allows the user to precisely drop a small payload from the air. A digital backbone allows for rapid deployment of the latest technology, meaning better pictures and more capabilities.

Stabilized pan, tilt, zoom electro-optical, infrared, and low-light cameras with the ability to lock and track targets enables unprecedented imaging capabilities in a small UAS for operations in all weather conditions, day or night.

Launch bungee rail or vtol
max payload 5.5 lbs
8+ hours
altitude up to 12000 ft
Stalker VTOL eXtended Endurance (Stalker) By the Numbers   ___

The Stalker is powered by a ruggedized Solid Oxide Fuel Cell (SOFC) that uses globally available propane to achieve 8+ hours of operation.

  • Max Payload: 5.5 lbs
  • Max Takeoff Weight: 48 lbs (battery) 44 lbs. (fuel cell)
  • Flight Time: 8+ hrs
  • Altitude: Up to 12,000 ft
  • Max Speed: 58 mph
  • Propulsion: Propane Fuel Cell with Rechargeable Hybrid Battery or Dual Rechargeable Batteries
  • Launch: Vertical Takeoff and Landing
  • Wingspan: 16 ft
  • Operators: 1 to 2
Stalker In The News   ___
How US firefighters could harness the power of military drones
Dec 03, 2015
Third Party Article
Aircraft with human pilots have been supporting American firefighters for several decades. This is a new generation of machines helping to fight fires. The Stalker Extended Endurance (XE) and K-MAX drones could reinforce firefighters and potentially reduce the risk to the lives of first responders.
Lockheed completes Stalker XE unmanned aircraft system demonstration
Dec 02, 2015
Third Party Article
Lockheed Martin has demonstrated unmanned aircraft system (UAS) operations in the National Airspace System (NAS) using its prototype UAS Traffic Management (UTM) capabilities.
Unmanned helicopter and drone join forces in safer approach to fighting fire
Dec 02, 2015
Third Party Article
In a recent demonstration, Lockheed Martin has shown how the unmanned K-MAX helicopter can combine with a quadcopter to battle blazes below.
Skunk Works®   ___


At Lockheed Martin Skunk Works®, your mission defines our purpose. Our team of dedicated engineers and scientists assume it can be done. With a visionary focus on the future, we partner with our customers to anticipate tomorrow’s capability gaps and technology needs to solve the most critical national security challenges today.