PBS TJ100 UAV turbojet propulsion engine

The PBS TJ100 is a small turbojet engine from PBS Aerospace for unmanned aircraft and target aircraft. It belongs to the maker's turbine engine range and is a combustion engine that produces direct jet thrust, with an integrated starter system and variants for different missions.

Thrust ranges from 1,100 to 1,250 N depending on the modification, with a specific fuel consumption of 0.118 kg/N/h. For an integrator, thrust and fuel consumption together set the speed and range of a jet-powered airframe. The engine weighs 17.60 kg, with an outer diameter of 272 mm and a length of 636 mm, so it fits a slender fuselage or pod.

The operating envelope extends to a maximum altitude of 10,000 m and a maximum speed of 0.9 M, at ambient temperatures from -50 to +45 degrees C. The starting envelope is narrower: up to 6,000 m, up to 0.5 M and from -35 to +45 degrees C, which matters for air-launched or in-flight restart planning.

The engine runs from a 28 V DC power supply, and it provides electrical power output of 700 to 2,300 W, enough to supply part of the aircraft's own systems without a separate generator in the airframe. Time between overhauls is 25 to 300 hours depending on the modification; the higher figures suit reusable airframes while the lower ones fit short-life target and expendable applications.

Integration points are the 28 V DC supply, the electrical output, the thrust line along the 272 mm body and the starting hardware that the engine carries. PBS offers the engine in variants, with thrust, overhaul interval and electrical output varying by modification.

Typical applications are target drones, reconnaissance and strike UAVs, and other subsonic unmanned aircraft in the defense market. The same brochure lists the larger TJ150 and TJ200 and the smaller TJ80-120 in the same turbojet family.