Sojka III

Sojka III
	Sojka III in the Kbely Aviation Museum, Prague
Role	unmanned aerial vehicle (UAV)
National origin	Czech Republic
Primary user	Czech Army

Sojka III is an unmanned aerial vehicle (UAV) operated by the Czech Army until it was decommissioned in December 2011.

Usage

The mission of Sojka ("jaybird") is to provide aerial reconnaissance, radio reconnaissance, artillery fire observation, electronic warfare, or to launch infrared targets for air defence training.

A Sojka unit usually consists of three or four Sojka UAVs, a transport truck, launch truck, control and monitoring vehicle, and an off-road vehicle for transport of the landed UAV.

Flight

The Sojka is launched from a ramp using a rocket-assisted device to get takeoff speed. Wind limits are 12 m/s against the wind or 3 m/s in a side wind. A wind speed of lower than 8 km/h is required to get a good optical environment.

The operator can choose between two modes:

Semiautomatic – the operator can change the altitude and direction of the UAV
Automatic – the operator can specify up to eight turning points. The operator can switch to semiautomatic mode or order plane to return to the starting point at any time.

Landing can be done using a parachute or via operator control.

Specifications (Sojka III)

General characteristics

Crew: unmanned/land control
Payload: 20 - 30 kg ()
Length: 3.78 m (12.4 ft)
Wingspan: 4.12 m (13.5 ft)
Height: ()
Max. takeoff weight: 145 kg (319.7 lb)
Powerplant: 1 × , ()

Performance

Maximum speed: 180 km/h (112 mph)
Cruise speed: 130 km/h (81 mph)
Range: 100 km (60 mi)

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External links

Czech Army info about Sojka

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