UL350iHPS

  • 82.4kg
  • 150hp
  • contact us

This powerful engine is developed for helicopters and gyrocopters and is equipped with a forced cooling system. While hoovering the natural airflow is not sufficient to cool down the cylinder heads. So a fan driven by the crankshaft, blows air along the aluminium air boxes.

Thanks to the modified camshaft and inlet collector the UL350IHPS generates up to 150HP at 3500 rpm. This forced cooling system has an integrated oil radiator.

  • 4 stroke, 4 cylinder, horizontally opposed
  • Dual (redundant) electronic spark ignition (variable timing)
  • Electronic multipoint fuel injection (pressure and temperature compensated)
  • Electronic RPM limiter
  • Direct propeller drive
  • 5 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
  • Electric starter
  • Electric fuel pump and pressure regulator to eliminate vapor lock and facilitate starting even under adverse conditions



Displacement 3503 cc [213.77 cu in]
Bore 105.6 mm [4.157 in]
Stroke 100 mm [3.937 in]
Compression Ratio 8.7 : 1
Firing Order 1 - 3 - 2 - 4
Direction of Rotation Clockwise - Pilot's view
Torque
(ISA conditions)
315 Nm @ 2800 rpm
Power rating
(ISA conditions)
150 hp @ 3500 rpm /  131 hp @ 3000 rpm
Installed weight 78.4 kg [172.8 lbs] (including starter motor and alternator) + 4kg (forced cooling)
DC output 30 Amp
Oil capacity 3L
Fuel MOGAS with min. 98 octane rating or AVGAS (98 Oct = 90MON = 94 AKI)

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 UL350iHPS engine corrected to the International Standard Atmosphere conditions at sea level.

Dimensions

Dimension Weight
Maximum dimension in X direction (length)* 685.0 mm [26.9 inch]
Maximum dimension in Y direction (width)* 736 mm [28.97 inch]
Maximum dimension in Z direction (height)* 550 mm [21.6 inch]

Weights

  • Dry weight of the basic standard engine from serial production: 66,1 kg (145,73 lb)
  • Ready-to–fly weight: 82,4 kg (186.3 lb)

For more details please check the installation manual.

To be released

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
  • Wet sump forced lubrication with integrated pressure regulator
  • Stainless steel exhaust and muffler included
  • One electric fuel pump, two fuel filters, fuel pressure regulator and air filter

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

Please contact us for more info / prices

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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.