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Advanced in every detail

The SQ-4 is the most advanced small VTOL UAV’s available today. Packed with excellent unique features, it is ideal for both military and civilian use. Designed to fly into very small spaces, including indoors, the SQ-4 can be controlled or observed from literally anywhere in the world.

The SQ-4 RECON offers you the ability to carry out reconnaissance tasks without putting you in harm’s way.


Lightweight yet Powerful

Built from carbon fibre, the SQ-4 offers a lightweight (600 gram) vertical take-off and landing (VTOL) surveillance air-element.

Small, fast, robust and very quiet, the SQ-4 is ideal for performing a wide range of tasks including, surveillance, reconnaissance, HASMAT damage assessment, both indoor and outside.



Custom made multilayer APM compatible PCB with MAVlink. All sensors, RF communications modules (control, telemetry and video) and GPS onboard. Multi- processor platform with integrated backup system for in-flight recovery and manual override with dedicated processor and stand-alone redundant power supply.

LIDAR interface with sense and avoid algorithm integrated on APM firmware.

Autopilot features:

Auto Takeoff and Landing:
After sent the command to takeoff and the Quadrotor will increase its altitude at a designated rate until a predefined altitude is reached. The auto landing ensures that the Quadrotor will land at a predefined place and with a specified descending rate.

This mode ensures that the Quadrotor stays in current position at a constant altitude. This mode can also make the Quadrotor orbiting around a point at a constant altitude.

Return to Launch:
When this features is activated the Quadrotor returns to its Home position, which is defined at the moment in which the Quadrotor motors are armed or can be changed during flight. The returning home can be made at a designated altitude or at the altitude in which the Quadrotor is at the moment the return to launch instruction is sent.

Waypoint Navigation:
Define a 3D track with a set of waypoints and the Quadrotor will follow the defined trajectory with a desired heading and speed.

Day / Night Video & Stills Camera

The SQ-4 has two high resolution cameras. The main high resolution camera can be moved in flight from 90° forward to 130° down. There is also an additional downward facing camera for landing. The 3.6mm lens on each camera provide a 87 degree FOV diagonal and has a low light sensitivity. Night vision is aided by a powerful spot light that is strong enough to illuminate a room or provide searching at night (limited to 20 meters range). A thermal camera can replace one of the fixed cameras if required (separate price on application).

Sense & Avoid (Indoor flying)

The SQ-4 is fitted with LIDAR as standard. Optical Flow array can also be fitted to assist with indoor flying on certain models. In cases where the drone is required to operate in close proximity with other objects it is advisable to fit propeller. Note: Good sense and avoid is a combination of sensor and pilot skill.

Perch & Stare

The downward facing camera allows you to land the SQ-4 remotely. You can then turn off the motors and monitor for up to 4 hours before flying the SQ-4 home.

Rain Resistant


Included Payloads

  • Lidar sense and avoid
  • Adjustable forward facing tilt down camera
  • Fixed landing camera
  • Forward and downward search lights
    Can be set to ‘on’, ‘off’ or ‘flashing’ while flying
  • Ultrasound Z – sensor
  • Ground Control Station (UXC-800)

Optional Payloads

  • Geiger counter (Octocopter model only)
  • Optical Flow indoor navigation
  • LIDAR and Ultra-sound sensor (z-axis)
  • Rain operation capability
  • Distance sensors to the front and underside assist together with implemented algorithms assist functions such as
    sense & avoid and auto- landing procedure.
  • Thermal camera
  • NIR camera
  • Multiple interchangeable gas sensors*

*Gas Sensors

oxygen carbon monoxide hydrogen sulphide
chlorine sulphur dioxide nitrogen dioxide
nitric oxide ozone methane
propane butane alcohol
halocarbon gas

Dimensions 30 x 30 x 8 cm
Weight (without battery) 600 grams
Weight (with 10000mAh battery) 1.1 Kilos
Weight (with 5000mAh battery) 800 grams
Horizontal speed > 8m per second
Vertical speed > 5m per second
Max height 1000 meters
Max range 3 Kilometers
Batteries 10000 mAh 7.4V Lipo battery/5000 mAh 7.4V Lipo battery
Battery recharge time 60 minutes
Battery Swap time 30 seconds
Maximum take-off weight (MTOW) 1350 grams

ARM Cortex M4 32bits processor running NuttX RTOS (main processor) ARM Cortex M3 32bits processor (fail-safe processor) (with 10000mAh battery)
U-BLOX LEA-6H GPS module U-BLOX 6 position engine
50 Channels GPS L1 frequency, C/A Code
GALILEO Open Service capable1 GLONASS FDMA1
5Hz navigation update rate Navigate down to –162 dBm and –148 dBm coldstart
Faster acquisition with AssistNow Autonomous Configurable power management
Hybrid GPS/SBAS engine (WAAS, EGNOS, MSAS) 433MHz RF transceiver for telemetry data link (900MHz available)
2.4GHz RF transceiver for control data link

Flashing hazard warning lights for poor weather conditions Temperature -20 to 50 ºC
Wind 30 Km/ hour (Beaufort Scale 5) Perch & Stare duration 4 hours (based on 10 minute flight time)
Modulation FHSS (frequency-hopping spread spectrum) Output power: +22dBm
Sensitivity: -98dBm 5.8Ghz RF transmitter for video link
Output power: +28dBm microSD card for long-time and fast data flight logging
Redundant power supply inputs and automatic failover PPM interface
PW M interface CAN bus Interface

Image Gallery

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