UL350iHPS | ULPower Aero Engines

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 (232 ft.lbs) @ 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) + 12kg (forced cooling inclusive oil cooler and lines)
DC output	30 Amp
Oil capacity	Min 2,5L
Fuel	MOGAS with min. 97 RON/88 MON (= 93 AKI) octane rating or AVGAS

Performance

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 & weights

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: 90,4 kg (199.3 lb)

For more details please check the technical data document.

Fuel consumption

Fuel consumption (Liter/hour)

Specific fuel consumption

These are values at full throttle. When cruising estimated average is UL350 ±18l.
(depending on type of plane, personal style of flying, cruise speed , climate circumstances)

Price & options

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