UL520T | ULPower Aero Engines

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)

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 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.

Dimensions & weights

Dimensions

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]

Weights

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.

Fuel consumption

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).

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