IDEX 2017

Small yet potent [IDEX17D5]

23 February 2017

Manufacturers of lightweight and small air vehicles would do well to consider the TJ100 turbojet engine from Czech company PBS Velká Biteš (Stand 05-B02). The new high-performance engine has been purpose-designed and optimised for UAVs and target drones.

With an extensive list of envisaged performance enhancements and refinements over legacy models, PBS succeeded in significantly increasing engine thrust and end-use properties. This was done within the confines of the engine’s existing external dimensions.

The TJ100 is a single-shaft engine featuring a starter generator integrated in the radial compressor impeller, one axial turbine, an autonomous fully aerobatic oil system and digital control. Apart from the ignition device and stop valve, all accessories are integrated in the engine for easy and convenient build-up.

The key features of the engine are its compact size, low mass, reliability, wide starting envelope and low fuel and oil consumption.

Development of the new upgraded engine started in 2012. The envisaged parameters included increasing thrust to 1,300N, service life to 300 hours, reducing specific fuel consumption, increasing airspeed to Mach 0.9, and expanding the flight envelope to 10km.

PBS designed new flow parts, including a new combustion chamber and more powerful fuel pump and fuel nozzles. Verification of the starting and flight envelopes involved tests at the Central Institute of Aviation Motors (CIAM) in Moscow in a thermobaric chamber, which simulates a range of environmental conditions. The data obtained was not only used for the internal verification of the engine’s characteristics, but also to inform customers about the flying qualities of the TJ100.

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