• 122 kg
  • 220 hp
  • Contact us

The UL520T is based on the well proven  UL520 but now with a turbo charger
The main goal of this turbo is not to create a big boost in HP but  rather to compensate for the loss of atmospheric density during all phases of flight,  and thus eliminating the loss of power  seen with elevated altitudes. The UL520T maintains its 220HP from sea level up to 15000 ft.
An ASTM compliant version (with dual ECU) is available as well.

  • 4 stroke, 6 cylinder, horizontally opposed
  • Dual (redundant) electronic spark ignition (variable timing)
  • Electronic multipoint fuel injection (pressure and temperature compensated)
  • Electronic RPM limiter
  • Electronic overboost limiter
  • Direct propeller drive
  • 7 bearing crankshaft with surface hardening treatment and additional large thrust bearing (ball bearing type)
  • Single central camshaft
  • Push rods, tappets and OHV (hydraulic compensators have not been used)
  • Wet sump forced lubrication with integrated pressure regulator
  • Ram air cooled cylinders and cylinder heads
  • Integrated permanent magnet AC generator, external rectifier-regulator
  • Factory installed exhaust system with integrated turbo charger and waste gate.
  • Turbocharger with ceramic ball bearings
  • Electric starter
Displacement 5254 cc
Bore 105.6 mm
Stroke 100 mm [3.937 in]
Compression Ratio 8 : 1
Firing Order 1 - 4 - 5 - 2 - 3 - 6
Direction of Rotation Clockwise - Pilot's view
Maximum Torque
(ISA conditions)
585 Nm [431 ft.lb] @ 2300 rpm
Power rating
(ISA conditions)
220 hp @ 2700 rpm up to 15000 ft
Max Boost MAP 38 inHG (130kPa)
Installed weight 122 kg - 269 lbs(including starter motor and alternator)
DC output 50 A
Oil capacity 4 L
Fuel MOGAS with min. 97 RON / 88 MON (= 93 AKI) octane rating or AVGAS (100LL or UL91)

Power / Torque curve

The power and torque curve of the engine has been established by repeated dyno tests, which were performed at sea level and in weather conditions close to the ISA standard. The following graph shows the real, available power and torque coming from the crankshaft of the UL520T engine corrected to the International Standard Atmosphere conditions at sea level.

Power vs Density Altitude

The following graph shows the calculated available power of the UL520T engine at 2700 RPM setting, WOT (wide open throttle) and varying density altitude.


Dimension Weight
Maximum dimension in X direction (length)* 847 mm [33.34 inch]
Maximum dimension in Y direction (width)* 744 mm [29.28 inch]
Maximum dimension in Z direction (height)* 551 mm [21.69 inch]


  • Ready-to–fly weight: 122 kg (269 lb)
    Weight of the fuel connection kit, oil cooler kit and intercooler kit not included

For more details please check the technical data document.

The specific fuel consumption is 0.3l/h/HP (0.08USgal/h/HP).
Depending on the type of aircraft, personal style of flying,…, the average fuel consumption during cruise is 33-41 l/hour 8 -11 USgal/hour).

The following is a list of the ULPower engine standard design features, all included at no additional cost.

  • Dual (redundant) electronic spark ignition (variable timing)
  • Multi-point electronic fuel injection with automatic altitude and temperature compensation
  • Electronic RPM limiter
  • Rubber mounts
  • Alu ram airboxes
  • Breather with Oil/Air separator (including: temperature resistant hoses and banjo connections)
  • Direct propeller drive
  • ECU (electronic control unit) and mil spec wiring loom
  • Wet sump forced lubrication with integrated pressure regulator
  • Stainless steel exhaust and muffler included
  • One electric fuel pump, two fuel filters, fuel pressure regulator (not included with the UL520T)
  • Oil and air filter
  • Oil and air temperature sensors, Oil and fuel pressure sensors, Air pressue sensor which provide data read-out through RS232 OR CANBUS

Extra options

  • EGT Sensor kit
  • CHT Sensor kit
  • Fuel connection kit
  • Oil Cooler kit
  • Double ecu
  • Different types of prop flanges
  • Different exhaust systems
  • Swiveling oil pick-up tube
  • Dual alternator
  • Forced air cooling
  • Intercooler kit

Please contact us for more info / prices

Collection of ULPower spare parts
More questions? We've got you covered!

Visit our engine FAQ or contact us.

Note: Pictures may not always represent the exact colour or shape.
All prices indicated are excluding taxes and transportation costs.
Deliveries to private individuals within the European Union are subject to 21% Belgian VAT. Prices subject to change without notice.