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ZofiTech ZT J23 compact turbojet engine for UAV propulsion on a dark background, showing the intake nose cone, fuel fittings, and wiring leads.
Three ZofiTech ZT J Series turbojet engines (ZT J40, ZT J80, ZT J160) lined up on a workshop bench, showing compact stainless housings for UAV propulsion.
ZofiTech ZT J Series turbojet engines (ZT J160, ZT J80, ZT J40) shown side by side on a workshop bench, illustrating compact UAV propulsion engines in multiple thrust classes.
Close-up of a ZofiTech ZT J Series turbojet engine in a workshop, highlighting the stainless housing and compact intake assembly for UAV and target drone propulsion.
ZofiTech ZT J Series turbojet engines on a workshop bench, with the largest unit in the foreground and smaller models behind for UAV and target drone propulsion.
ZofiTech

ZT J23

Thrust 230 N 51.7 Lbf
Engine diameter 130 mm 5.1 Inch
Engine length 347 mm 14.7 Inch
Engine weight 2900 g 6,4 Lbs
The ZT J23 is a compact and reliable turbojet engine developed by ZofiTech for small UAVs, target drones, and aerospace demonstrators. Delivering 230 N of thrust, it offers exceptional power, efficiency, and responsiveness in a lightweight package. With over 30 years of production and improvement, the ZT J23 has proven itself across both professional defense applications — including aerial targets and unmanned platforms — and among aerospace enthusiasts and model developers. A dedicated research version is also available for universities, helping students explore the fundamentals of thermodynamics and turbine engine operation.
  • 230 N of thrust with excellent fuel efficiency
  • Outstanding power for its size
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Technical description

All data at STP ± 2%
Engine diameter 130 mm 5.1 in
Engine length 374 mm 14.7 in
Engine weight 2 900 g 6.4 lb
System airborne weight * 3 845 g 8.5 lb
Thrust at S.T.P. ** 230 N 51.7 lbf
Maximum RPM 108 500 108 500
Thrust at idle RPM 13 N 2.9 lbf
Pressure ratio 3.5:1 3.5:1
Mass flow 450 g/s 0.99 lb/s
Max continuous EGT 750 °C 1 380 °F
Fuel consumption 640 g/min 22.5 oz/min
Specific fuel consumption 46.4 g/(kN · s) 1.64 lb/(lbf · h)
Starting method: Direct kerosene starting gas turbine, on request propane start.
* Total weight of: Engine, ECU, pump, battery, thermosensor, valves, mounting straps.
** On request the RPM can be raised to 110 000 RPM giving 10 N additional thrust.
Min operation temperature * -35 °C -31 °F
Max operating temperature +50 °C +122 °F
Max operating altitude 8 000 m 26 250 ft
Max operating speed 1 000 km/h 620 mph
* With the use of LiPo batteries the minimum operation temperature is limited to -10 °C.
1 × RS-232 Throttle and switch settings including special functions *
2 × PWM between 1–2 ms ** Throttle and switch settings. (special functions * with push button)
2 × Analog inputs 0–5 V DC ** Throttle and switch settings. (special functions * with push button)
* Activation of prime function, igniter function, starter function, speed cool.
** Specify ECU at ordering with PWM inputs or analog inputs.
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